CN112430407A - Material with air purifying and negative ion releasing functions, preparation method thereof and application thereof in coating - Google Patents
Material with air purifying and negative ion releasing functions, preparation method thereof and application thereof in coating Download PDFInfo
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- CN112430407A CN112430407A CN202011273802.1A CN202011273802A CN112430407A CN 112430407 A CN112430407 A CN 112430407A CN 202011273802 A CN202011273802 A CN 202011273802A CN 112430407 A CN112430407 A CN 112430407A
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
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Abstract
The invention discloses a material with the functions of purifying air and releasing negative ions, a preparation method thereof and application thereof in paint, wherein the material is prepared from the following raw materials: tourmaline powder, modified titanium dioxide, modified montmorillonite, heavy calcium powder, sodium silicate, humic acid, lithopone, silica sol, tea polyphenol, chitosan, magnesium oxide and deionized water. The material with the functions of purifying air and releasing negative ions can effectively purify air and release negative ions, and can be widely applied to indoor and outdoor air purification; the material can effectively release negative ions by adding tourmaline powder, and the material can effectively improve the absorption of indoor harmful gas by combining physical adsorption, chemical oxidation and photocatalyst catalytic degradation through scientific and reasonable proportioning, thereby achieving the effect of purifying air.
Description
Technical Field
The invention relates to the technical field of air purification materials, in particular to a material with the functions of purifying air and releasing negative ions, a preparation method thereof and application thereof in paint.
Background
Indoor furniture, ornaments, household chemicals and the like respectively cause pollution of different degrees to indoor environment. At present, scientists detect over 500 organic substances from indoor air, wherein the common indoor pollutants are mainly formaldehyde, benzene, toluene, xylene, ammonia and Total Volatile Organic Compounds (TVOC). These contaminants directly affect people's quality of life and health. Air purification materials in interior wall coatings are generally favored by people and accepted by markets, but the problem of how to improve the purification effect of the air purification materials is urgently solved.
Chinese patent CN201510776125.8 discloses a bentonite color coating powder with air-purifying function, which uses nano titanium dioxide, and specifically describes that nano titanium dioxide can generate photocatalytic reaction similar to photosynthesis under the action of light, and generate free hydroxyl and active oxygen with extremely strong oxidizing power, and has very strong photo-oxidation-reduction function, and can oxidize and decompose various organic compounds and partial inorganic substances, and can destroy the cell membrane of bacteria and solidify the protein of virus, and can kill bacteria and decompose organic pollutants, and decompose organic pollutants into pollution-free water and carbon dioxide, thus having extremely strong functions of sterilization, deodorization, mildew prevention, self-cleaning and air purification. However, when the nano titanium dioxide is applied to the coating, the titanium dioxide only responds in an ultraviolet region, so that the application of the nano titanium dioxide to the inner wall is not facilitated, namely, the photocatalytic activity of the nano titanium dioxide can be performed only under the irradiation of ultraviolet light.
The Chinese article 'preparation and performance research of natural zeolite supported titanium dioxide photocatalyst' discloses that a TiO 2/zeolite photocatalyst is prepared by using butyl titanate as a titanium source and natural zeolite as a carrier by a sol-gel method, and the prepared TiO2 photocatalyst has a good photocatalytic degradation effect on methyl orange. TiO 2/zeolite photocatalyst with 35% TiO2 load is used, when the dosage is 2 g/L, ultraviolet light irradiation is carried out for 30min, and the decolorization rate of the methyl orange solution can reach 96%. It teaches that natural zeolite supports titanium dioxide, but it still requires continuous irradiation of ultraviolet light to exert the function of titanium dioxide, and cannot be applied to the field of indoor coating, and it does not disclose whether the effect of titanium dioxide after supporting is improved for purifying air.
The Chinese article, "photocatalytic performance research of titanium dioxide supported by molecular sieve" discloses that TiO2/A type molecular sieve photocatalyst is synthesized by adopting a sol-gel impregnation method. The surface active sites of the A-type molecular sieve are improved by loading TiO2, the photocatalytic activity of a sample is effectively improved, and the degradation rate of the A-type molecular sieve catalyst loaded with TiO2 to RhB reaches 95.4% after 2 hours of ultraviolet irradiation. After the load is passed, ultraviolet irradiation is required for ultraviolet light, the coating cannot be applied to the field of indoor coatings, and the degradation rate of RhB reaches 95.4%. It is not disclosed whether the effect of the titanium dioxide after loading is improved for purifying air.
Disclosure of Invention
The invention provides a material with the functions of purifying air and releasing negative ions, a preparation method thereof and application thereof in paint.
The invention adopts the following technical scheme for solving the technical problems:
a material with the functions of purifying air and releasing negative ions is prepared from the following raw materials in parts by weight: 10-20 parts of tourmaline powder, 4-10 parts of modified titanium dioxide, 4-10 parts of modified montmorillonite, 2-6 parts of heavy calcium powder, 2-5 parts of sodium silicate, 1-4 parts of humic acid, 1-3 parts of lithopone, 0.5-2.5 parts of silica sol, 0.5-2 parts of tea polyphenol, 0.5-1.5 parts of chitosan, 0.5-1.5 parts of magnesium oxide and 45-70 parts of deionized water.
As a most preferable scheme, the material with the functions of purifying air and releasing negative ions is prepared from the following raw materials in parts by weight: 12 parts of tourmaline powder, 7 parts of modified titanium dioxide, 6 parts of modified montmorillonite, 5 parts of heavy calcium powder, 3 parts of sodium silicate, 2 parts of humic acid, 1.5 parts of lithopone, 1.5 parts of silica sol, 1.2 parts of tea polyphenol, 1 part of chitosan, 0.8 part of magnesium oxide and 60 parts of deionized water.
As a preferable scheme, the preparation method of the modified titanium dioxide comprises the following steps:
adding 1-4 parts of titanium dioxide into 40-60 parts of absolute ethyl alcohol, and stirring at the rotating speed of 60-100 rpm for 30-60 min to obtain a suspension;
adding 1-4 parts of zeolite into 20-40 parts of hydrochloric acid solution, stirring at 60-80 ℃ and 60-100 rpm for 100-150 min, filtering, and drying to obtain pretreated zeolite;
adding 1-4 parts of pretreated zeolite into 5-15 parts of suspension, adding 0.05-0.15 part of octadecyltrimethoxysilane, heating to 60-90 ℃, stirring at the rotating speed of 60-100 rpm for 100-200 min, filtering, drying, and grinding to 100-300 meshes to obtain the modified titanium dioxide.
Under the action of light or ultraviolet light, the titanium dioxide can generate active oxygen and hydroxyl with extremely strong oxidizing power, and the polluted gas of formaldehyde is decomposed into water and carbon dioxide, so that the aim of purifying air is fulfilled, and the titanium dioxide is an ideal air purifying raw material.
When the titanium dioxide is applied to the paint, the titanium dioxide only responds in an ultraviolet region, so that the application of the titanium dioxide in an inner wall is not facilitated, namely, the photocatalytic activity of the titanium dioxide can be carried out only under the irradiation of ultraviolet light, and the photoproduction electron-hole pairs of pure titanium dioxide are easy to recombine, so that the pure nano titanium dioxide needs to be modified, and the titanium dioxide can also carry out the photocatalytic activity under the irradiation of sunlight and indoor light.
According to the invention, titanium dioxide and zeolite subjected to acidification treatment are tightly combined, the zeolite has a special pore channel structure, has ion exchange, selective adsorption and catalytic reaction activities, can obviously inhibit the recombination of photoproduction electrons and holes, increases the specific surface area of photocatalysis, can effectively improve the photocatalysis efficiency, improves the air purification effect, and can be widely applied to the field of indoor decoration.
The applicant of the present invention finds, in a great deal of research centers, that although the photocatalytic efficiency of titanium dioxide modified by zeolite is significantly improved and the titanium dioxide can be applied to the field of interior decoration, the obtained modified titanium dioxide is difficult to disperse in paint formulations and aqueous solutions, and agglomeration phenomenon occurs, which seriously affects the application of the modified titanium dioxide, and therefore, how to solve the problem of dispersion of the modified titanium dioxide becomes a new problem faced by the inventor.
Preferably, the hydrochloric acid solution has a molar concentration of 4 mol/L.
As a preferred scheme, the preparation method of the modified montmorillonite is characterized by comprising the following steps:
adding 1-4 parts of montmorillonite into 20-50 parts of deionized water, and stirring at the rotating speed of 60-100 rpm for 80-150 min to obtain a suspension;
adding 1-4 parts of sepiolite into 30-60 parts of nitric acid solution, and stirring at the rotating speed of 80-150 rpm at 70-95 ℃ for 50-80 min to obtain a mixed solution;
and (3) dripping 0.5-2 parts of the mixed solution into 10-20 parts of the suspension, carrying out ultrasonic treatment for 25-40 min, filtering, drying, and grinding to 100-300 meshes to obtain the modified montmorillonite.
The applicant of the invention finds that interlayer lattices are cracked by modifying montmorillonite, the interlayer spacing of the montmorillonite is enlarged, the specific surface area of the montmorillonite is improved, and the adsorption effect of the montmorillonite is obviously improved in a large amount of researches.
The applicant of the invention surprisingly finds that the modified montmorillonite obtained through modification has good suspension performance and dispersibility in an aqueous solution, and can effectively adjust the leveling performance of the aqueous solution (or a coating formula), so that the problem of dispersibility of modified titanium dioxide in the aqueous solution (or the coating formula) can be effectively solved, and the modified montmorillonite and the modified titanium dioxide have good synergistic effect.
Preferably, the molar concentration of the nitric acid is 1.5-2.5 mol/L.
As a preferred scheme, the ultrasonic power is 400-800W.
The invention also provides a preparation method of the material with the functions of purifying air and releasing negative ions, which comprises the following steps:
(1) adding modified titanium dioxide, modified montmorillonite and deionized water into a mixer, and stirring at the rotating speed of 200-400 rpm for 6-10 min;
(2) then adding tourmaline powder, heavy calcium powder, sodium silicate, humic acid, lithopone, silica sol, tea polyphenol, chitosan and magnesium oxide, and stirring at the rotating speed of 600-1000 rpm for 8-15 min to obtain a mixed solution;
(3) filtering and drying the mixed solution to obtain the material with the functions of purifying air and releasing negative ions.
As a preferable scheme, the step (1) is specifically: adding the modified titanium dioxide, the modified montmorillonite and the deionized water into a mixer, and stirring for 8min at the rotating speed of 300 rpm.
The invention also provides application of the material with the functions of purifying air and releasing negative ions in the coating.
The invention has the beneficial effects that: (1) the material with the functions of purifying air and releasing negative ions can effectively purify air and release negative ions, and can be widely applied to indoor and outdoor air purification; (2) the material can effectively release negative ions by adding tourmaline powder, and the invention can effectively improve the absorption of indoor harmful gas by combining physical adsorption, chemical oxidation and photocatalyst catalytic degradation through scientific and reasonable proportioning, thereby achieving the effect of purifying air; (3) according to the invention, titanium dioxide and zeolite subjected to acidification treatment are tightly combined, the zeolite has a special pore channel structure, has ion exchange, selective adsorption and catalytic reaction activities, can obviously inhibit the recombination of photoproduction electrons and holes, increases the specific surface area of photocatalysis, can effectively improve the photocatalysis efficiency, improves the air purification effect, and can be widely applied to the field of indoor decoration; the interlayer lattice is cracked by modifying the montmorillonite, the interlayer spacing of the montmorillonite is enlarged, the specific surface area of the montmorillonite is improved, and the adsorption effect of the montmorillonite is obviously improved; the modified montmorillonite obtained through modification has good suspension performance and dispersibility in an aqueous solution, and the leveling performance of the aqueous solution (or a coating formula) can be effectively adjusted, so that the problem of dispersibility of modified titanium dioxide in the aqueous solution (or the coating formula) can be effectively solved, the modified montmorillonite and the modified titanium dioxide have good synergistic effect, and the modified titanium dioxide and the modified montmorillonite can have synergistic effect in the aspect of air purification; (4) the material has obvious antibacterial effect, wherein the antibacterial effect can be obviously improved by the modified titanium dioxide and the modified montmorillonite.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless otherwise stated, the parts are parts by weight.
Example 1
A material with the functions of purifying air and releasing negative ions is prepared from the following raw materials in parts by weight: 12 parts of tourmaline powder, 7 parts of modified titanium dioxide, 6 parts of modified montmorillonite, 5 parts of heavy calcium powder, 3 parts of sodium silicate, 2 parts of humic acid, 1.5 parts of lithopone, 1.5 parts of silica sol, 1.2 parts of tea polyphenol, 1 part of chitosan, 0.8 part of magnesium oxide and 60 parts of deionized water.
The preparation method of the modified titanium dioxide comprises the following steps:
adding 2 parts of titanium dioxide into 48 parts of absolute ethyl alcohol, and stirring at the rotating speed of 80rpm for 50min to obtain a suspension;
adding 2 parts of zeolite into 38 parts of hydrochloric acid solution, stirring at the rotating speed of 80rpm at 75 ℃ for 100-150 min, filtering, and drying to obtain pretreated zeolite;
adding 2 parts of pretreated zeolite into 13 parts of the suspension, adding 0.1 part of octadecyltrimethoxysilane, heating to 75 ℃, stirring at 80rpm for 120min, filtering, drying, and grinding to 200 meshes to obtain the modified titanium dioxide.
The molar concentration of the hydrochloric acid solution is 4 mol/L.
The preparation method of the modified montmorillonite comprises the following steps:
adding 2 parts of montmorillonite into 48 parts of deionized water, and stirring at the rotating speed of 80rpm for 100min to obtain a suspension;
adding 2 parts of sepiolite into 38 parts of nitric acid solution, and stirring at the rotating speed of 120rpm at 85 ℃ for 70min to obtain a mixed solution;
and (3) dropping 1 part of the mixed solution into 14 parts of the suspension, performing ultrasonic treatment for 30min, filtering, drying, and grinding to 200 meshes to obtain the modified montmorillonite.
The molar concentration of the nitric acid is 2 mol/L.
The ultrasonic power is 500W.
The preparation method of the material with the function of purifying air and releasing negative ions comprises the following steps:
(1) adding modified titanium dioxide, modified montmorillonite and deionized water into a mixer, and stirring for 8min at the rotating speed of 300 rpm;
(2) then adding tourmaline powder, heavy calcium powder, sodium silicate, humic acid, lithopone, silica sol, tea polyphenol, chitosan and magnesium oxide, and stirring at the rotating speed of 800rpm for 12min to obtain a mixed solution;
(3) filtering and drying the mixed solution to obtain the material with the functions of purifying air and releasing negative ions.
Example 2
A material with the functions of purifying air and releasing negative ions is prepared from the following raw materials in parts by weight: 10 parts of tourmaline powder, 4 parts of modified titanium dioxide, 4 parts of modified montmorillonite, 2 parts of heavy calcium powder, 2 parts of sodium silicate, 1 part of humic acid, 1 part of lithopone, 0.5 part of silica sol, 0.5 part of tea polyphenol, 0.5 part of chitosan, 0.5 part of magnesium oxide and 45 parts of deionized water.
The preparation method of the modified titanium dioxide comprises the following steps:
adding 2 parts of titanium dioxide into 48 parts of absolute ethyl alcohol, and stirring at the rotating speed of 80rpm for 50min to obtain a suspension;
adding 2 parts of zeolite into 38 parts of hydrochloric acid solution, stirring at the rotating speed of 80rpm at 75 ℃ for 100-150 min, filtering, and drying to obtain pretreated zeolite;
adding 2 parts of pretreated zeolite into 13 parts of the suspension, adding 0.1 part of octadecyltrimethoxysilane, heating to 75 ℃, stirring at 80rpm for 120min, filtering, drying, and grinding to 200 meshes to obtain the modified titanium dioxide.
The molar concentration of the hydrochloric acid solution is 4 mol/L.
The preparation method of the modified montmorillonite comprises the following steps:
adding 2 parts of montmorillonite into 48 parts of deionized water, and stirring at the rotating speed of 80rpm for 100min to obtain a suspension;
adding 2 parts of sepiolite into 38 parts of nitric acid solution, and stirring at the rotating speed of 120rpm at 85 ℃ for 70min to obtain a mixed solution;
and (3) dropping 1 part of the mixed solution into 14 parts of the suspension, performing ultrasonic treatment for 30min, filtering, drying, and grinding to 200 meshes to obtain the modified montmorillonite.
The molar concentration of the nitric acid is 2 mol/L.
The ultrasonic power is 500W.
The preparation method of the material with the function of purifying air and releasing negative ions comprises the following steps:
(1) adding modified titanium dioxide, modified montmorillonite and deionized water into a mixer, and stirring for 8min at the rotating speed of 300 rpm;
(2) then adding tourmaline powder, heavy calcium powder, sodium silicate, humic acid, lithopone, silica sol, tea polyphenol, chitosan and magnesium oxide, and stirring at the rotating speed of 800rpm for 12min to obtain a mixed solution;
(3) filtering and drying the mixed solution to obtain the material with the functions of purifying air and releasing negative ions.
Example 3
A material with the functions of purifying air and releasing negative ions is prepared from the following raw materials in parts by weight: 20 parts of tourmaline powder, 10 parts of modified titanium dioxide, 10 parts of modified montmorillonite, 6 parts of heavy calcium powder, 5 parts of sodium silicate, 4 parts of humic acid, 3 parts of lithopone, 2.5 parts of silica sol, 2 parts of tea polyphenol, 1.5 parts of chitosan, 1.5 parts of magnesium oxide and 70 parts of deionized water.
The preparation method of the modified titanium dioxide comprises the following steps:
adding 2 parts of titanium dioxide into 48 parts of absolute ethyl alcohol, and stirring at the rotating speed of 80rpm for 50min to obtain a suspension;
adding 2 parts of zeolite into 38 parts of hydrochloric acid solution, stirring at the rotating speed of 80rpm at 75 ℃ for 100-150 min, filtering, and drying to obtain pretreated zeolite;
adding 2 parts of pretreated zeolite into 13 parts of the suspension, adding 0.1 part of octadecyltrimethoxysilane, heating to 75 ℃, stirring at 80rpm for 120min, filtering, drying, and grinding to 200 meshes to obtain the modified titanium dioxide.
The molar concentration of the hydrochloric acid solution is 4 mol/L.
The preparation method of the modified montmorillonite comprises the following steps:
adding 2 parts of montmorillonite into 48 parts of deionized water, and stirring at the rotating speed of 80rpm for 100min to obtain a suspension;
adding 2 parts of sepiolite into 38 parts of nitric acid solution, and stirring at the rotating speed of 120rpm at 85 ℃ for 70min to obtain a mixed solution;
and (3) dropping 1 part of the mixed solution into 14 parts of the suspension, performing ultrasonic treatment for 30min, filtering, drying, and grinding to 200 meshes to obtain the modified montmorillonite.
The molar concentration of the nitric acid is 2 mol/L.
The ultrasonic power is 500W.
The preparation method of the material with the function of purifying air and releasing negative ions comprises the following steps:
(1) adding modified titanium dioxide, modified montmorillonite and deionized water into a mixer, and stirring for 8min at the rotating speed of 300 rpm;
(2) then adding tourmaline powder, heavy calcium powder, sodium silicate, humic acid, lithopone, silica sol, tea polyphenol, chitosan and magnesium oxide, and stirring at the rotating speed of 800rpm for 12min to obtain a mixed solution;
(3) filtering and drying the mixed solution to obtain the material with the functions of purifying air and releasing negative ions.
Example 4
The material with the functions of purifying air and releasing negative ions is characterized by being prepared from the following raw materials in parts by weight: 15 parts of tourmaline powder, 8 parts of modified titanium dioxide, 6 parts of modified montmorillonite, 3 parts of heavy calcium powder, 3 parts of sodium silicate, 2 parts of humic acid, 1.5 parts of lithopone, 1 part of silica sol, 1 part of tea polyphenol, 0.8 part of chitosan, 0.7 part of magnesium oxide and 58 parts of deionized water.
The preparation method of the modified titanium dioxide comprises the following steps:
adding 2 parts of titanium dioxide into 48 parts of absolute ethyl alcohol, and stirring at the rotating speed of 80rpm for 50min to obtain a suspension;
adding 2 parts of zeolite into 38 parts of hydrochloric acid solution, stirring at the rotating speed of 80rpm at 75 ℃ for 100-150 min, filtering, and drying to obtain pretreated zeolite;
adding 2 parts of pretreated zeolite into 13 parts of the suspension, adding 0.1 part of octadecyltrimethoxysilane, heating to 75 ℃, stirring at 80rpm for 120min, filtering, drying, and grinding to 200 meshes to obtain the modified titanium dioxide.
The molar concentration of the hydrochloric acid solution is 4 mol/L.
The preparation method of the modified montmorillonite comprises the following steps:
adding 2 parts of montmorillonite into 48 parts of deionized water, and stirring at the rotating speed of 80rpm for 100min to obtain a suspension;
adding 2 parts of sepiolite into 38 parts of nitric acid solution, and stirring at the rotating speed of 120rpm at 85 ℃ for 70min to obtain a mixed solution;
and (3) dropping 1 part of the mixed solution into 14 parts of the suspension, performing ultrasonic treatment for 30min, filtering, drying, and grinding to 200 meshes to obtain the modified montmorillonite.
The molar concentration of the nitric acid is 2 mol/L.
The ultrasonic power is 500W.
The preparation method of the material with the function of purifying air and releasing negative ions comprises the following steps:
(1) adding modified titanium dioxide, modified montmorillonite and deionized water into a mixer, and stirring for 8min at the rotating speed of 300 rpm;
(2) then adding tourmaline powder, heavy calcium powder, sodium silicate, humic acid, lithopone, silica sol, tea polyphenol, chitosan and magnesium oxide, and stirring at the rotating speed of 800rpm for 12min to obtain a mixed solution;
(3) filtering and drying the mixed solution to obtain the material with the functions of purifying air and releasing negative ions.
Comparative example 1
Comparative example 1 differs from example 1 in that comparative example 1 does not contain modified titanium dioxide, and the other is the same.
Comparative example 2
Comparative example 2 is different from example 1 in that comparative example 2 replaces the modified titanium dioxide with titanium dioxide, and the others are the same.
Comparative example 3
Comparative example 3 is different from example 1 in that the modified titania described in comparative example 3 is prepared by the same method as example 1, but otherwise.
The preparation method of the modified titanium dioxide comprises the following steps:
adding 2 parts of titanium dioxide into 48 parts of absolute ethyl alcohol, and stirring at the rotating speed of 80rpm for 50min to obtain a suspension;
adding 2 parts of diatomite into 38 parts of hydrochloric acid solution, stirring at a rotating speed of 80rpm at 75 ℃ for 100-150 min, filtering, and drying to obtain pretreated diatomite;
adding 2 parts of pretreated diatomite into 13 parts of the suspension, adding 0.1 part of octadecyltrimethoxysilane, heating to 75 ℃, stirring at 80rpm for 120min, filtering, drying, and grinding to 200 meshes to obtain the modified titanium dioxide.
The molar concentration of the hydrochloric acid solution is 4 mol/L.
Comparative example 4
Comparative example 4 is different from example 1 in that the modified titanium dioxide was prepared by a different method, and the others were the same.
The preparation method of the modified titanium dioxide comprises the following steps:
adding 2 parts of titanium dioxide into 48 parts of absolute ethyl alcohol, and stirring at the rotating speed of 80rpm for 50min to obtain a suspension;
adding 2 parts of zeolite into 13 parts of suspension, adding 0.1 part of octadecyltrimethoxysilane, heating to 75 ℃, stirring at 80rpm for 120min, filtering, drying, and grinding to 200 meshes to obtain the modified titanium dioxide.
The molar concentration of the hydrochloric acid solution is 4 mol/L.
Comparative example 5
Comparative example 5 differs from example 1 in that comparative example 5 does not contain modified montmorillonite, and the other is the same.
Comparative example 6
Comparative example 6 is different from example 1 in that comparative example 6 replaces the modified montmorillonite with montmorillonite, and the others are the same.
Comparative example 7
Comparative example 7 is different from example 1 in that the modified montmorillonite described in comparative example 7 is prepared by a method different from that of example 1, and the other steps are the same.
The preparation method of the modified montmorillonite comprises the following steps:
adding 2 parts of montmorillonite into 48 parts of deionized water, and stirring at the rotating speed of 80rpm for 100min to obtain a suspension;
adding 2 parts of chitosan into 38 parts of nitric acid solution, and stirring at the rotating speed of 120rpm at 85 ℃ for 70min to obtain a mixed solution;
and (3) dropping 1 part of the mixed solution into 14 parts of the suspension, performing ultrasonic treatment for 30min, filtering, drying, and grinding to 200 meshes to obtain the modified montmorillonite.
The molar concentration of the nitric acid is 2 mol/L.
The ultrasonic power is 500W.
The ultrasonic power is 500W.
Comparative example 8
Comparative example 8 is different from example 1 in that comparative example 8 does not contain modified titanium dioxide, modified montmorillonite, and the others are the same.
To further demonstrate the effect of the present invention, the following test methods were provided:
1. the detection method comprises the following steps: taking 12 pieces of the same size and 10m in volume3And the air-purifying materials prepared in examples 1 to 4 and comparative examples 1 to 8 were placed in the closed box (per m)3Evenly placing 10 g); putting a smoke generator in the sealed box, starting the smoke generator to generate smoke, so that the concentration of PM2.5 in each sealed box is 6.0 mu g/m3(ii) a After 3 hours, the concentration of PM2.5 in each box was measured, and the removal rate was calculated, and the specific results are shown in table 1.
2. The detection method comprises the following steps: the air-cleaning materials of examples 1 to 4 and comparative examples 1 to 8 were placed at 1m in equal mass, respectively3(per m)3Evenly placing 10 g) of the test chamber on the inner wall of the environment test chamber, filling equal amount of smoke into the environment test chamber through a smoke generator, purifying the smoke filled in the test chamber, wherein the test pollutants are formaldehyde and toluene respectively, the initial concentration of the pollutants is 100mg/L, analyzing the concentration of the pollutants by using a gas chromatograph after 20 minutes, and calculating the purification rate, and the test result is shown in table 1.
TABLE 1 test results
As can be seen from Table 1, the material of the invention has good air purification effect and can effectively remove PM2.5, formaldehyde and toluene.
As can be seen from comparison of examples 1-4, different formulation ratios can affect removal of PM2.5, formaldehyde and toluene, wherein example 1 is the best ratio.
It can be seen from comparison of example 1 and comparative examples 1 to 2 that the modified titanium dioxide of the present invention can significantly improve removal of PM2.5, formaldehyde, and toluene, and if the modified titanium dioxide is replaced with titanium dioxide, removal of PM2.5, formaldehyde, and toluene is significantly reduced.
Comparing example 1 with comparative examples 3 and 4, it can be seen that the removal of PM2.5, formaldehyde and toluene is significantly reduced if the method for preparing modified titania is replaced.
Comparing example 1 with comparative examples 5 to 6, it can be seen that the modified montmorillonite provided by the invention can significantly improve removal of PM2.5, formaldehyde and toluene, and if the montmorillonite is used for replacing the modified montmorillonite, removal of PM2.5, formaldehyde and toluene is significantly reduced.
Comparing example 1 with comparative example 7, it can be seen that in the present invention, if the preparation method of the modified montmorillonite is replaced, the removal of PM2.5, formaldehyde and toluene is significantly reduced.
Comparing example 1 with comparative example 8, it can be seen that the modified montmorillonite and modified titanium dioxide of the present invention have synergistic effect on removal of PM2.5, formaldehyde and toluene.
The modified montmorillonite obtained through modification has good suspension performance and dispersibility in an aqueous solution, and can effectively adjust the leveling performance of the aqueous solution (or a paint formula), so that the problem of dispersibility of the modified titanium dioxide in the aqueous solution (or the paint formula) can be effectively solved, and the modified montmorillonite and the paint formula have good synergistic effect when combined.
3. The release amount of negative ions was measured by the method described in JCT 1016-2006 Material negative ion Generation amount test method, and the test results are shown in Table 2.
TABLE 2 test results of anion release amount
As can be seen from Table 2, the material of the present invention can effectively release negative ions, and as can be seen from comparative examples 1-4, different ratios can affect the amount of negative ions released, wherein example 1 is the best ratio.
4. The antibacterial rate is tested according to the China light industry standard QB/T2591-2003. The strains used in the experiment: the results of the Staphylococcus aureus and Escherichia coli tests are shown in Table 3.
TABLE 3 results of the antibacterial test
As can be seen from table 1, the material according to the invention has an antibacterial effect.
As can be seen from comparison of examples 1-4, different formulation ratios can affect the antibacterial effect, wherein example 1 is the best ratio.
As can be seen from comparison of example 1 and comparative examples 1 to 2, the modified titanium dioxide of the present invention can significantly improve the antibacterial effect, and if the modified titanium dioxide is replaced with titanium dioxide, the antibacterial effect is significantly reduced.
Comparing example 1 with comparative examples 3 and 4, it can be seen that the antibacterial property is significantly reduced if the preparation method of the modified titanium dioxide is replaced.
Comparing example 1 with comparative examples 5 to 6, it can be seen that the modified montmorillonite of the present invention can significantly improve the antibacterial effect, and if the montmorillonite is used to replace the modified montmorillonite, the antibacterial effect is significantly reduced.
Comparing example 1 with comparative example 7, it can be seen that, in the present invention, if the preparation method of the modified montmorillonite is replaced, the antibacterial effect is significantly reduced.
Comparing example 1 with comparative example 8, it can be seen that the modified montmorillonite and modified titanium dioxide of the present invention have synergistic effect in antibacterial aspect.
The modified montmorillonite obtained through modification has good suspension performance and dispersibility in an aqueous solution, and can effectively adjust the leveling performance of the aqueous solution (or a paint formula), so that the problem of dispersibility of the modified titanium dioxide in the aqueous solution (or the paint formula) can be effectively solved, and the modified montmorillonite and the paint formula have good synergistic effect when combined.
In light of the foregoing description of preferred embodiments according to the invention, it is clear that many changes and modifications can be made by the person skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The material with the functions of purifying air and releasing negative ions is characterized by being prepared from the following raw materials in parts by weight: 10-20 parts of tourmaline powder, 4-10 parts of modified titanium dioxide, 4-10 parts of modified montmorillonite, 2-6 parts of heavy calcium powder, 2-5 parts of sodium silicate, 1-4 parts of humic acid, 1-3 parts of lithopone, 0.5-2.5 parts of silica sol, 0.5-2 parts of tea polyphenol, 0.5-1.5 parts of chitosan, 0.5-1.5 parts of magnesium oxide and 45-70 parts of deionized water.
2. The material with the function of purifying air and releasing negative ions as claimed in claim 1, wherein the material with the function of purifying air and releasing negative ions is prepared from the following raw materials in parts by weight: 12 parts of tourmaline powder, 7 parts of modified titanium dioxide, 6 parts of modified montmorillonite, 5 parts of heavy calcium powder, 3 parts of sodium silicate, 2 parts of humic acid, 1.5 parts of lithopone, 1.5 parts of silica sol, 1.2 parts of tea polyphenol, 1 part of chitosan, 0.8 part of magnesium oxide and 60 parts of deionized water.
3. The material with the function of purifying air and releasing negative ions as claimed in claim 1, wherein the modified titanium dioxide is prepared by the following steps:
adding 1-4 parts of titanium dioxide into 40-60 parts of absolute ethyl alcohol, and stirring at the rotating speed of 60-100 rpm for 30-60 min to obtain a suspension;
adding 1-4 parts of zeolite into 20-40 parts of hydrochloric acid solution, stirring at 60-80 ℃ and 60-100 rpm for 100-150 min, filtering, and drying to obtain pretreated zeolite;
adding 1-4 parts of pretreated zeolite into 5-15 parts of suspension, adding 0.05-0.15 part of octadecyltrimethoxysilane, heating to 60-90 ℃, stirring at the rotating speed of 60-100 rpm for 100-200 min, filtering, drying, and grinding to 100-300 meshes to obtain the modified titanium dioxide.
4. The material with the effect of purifying air and releasing negative ions as claimed in claim 3, wherein the molar concentration of the hydrochloric acid solution is 4 mol/L.
5. The material with the function of purifying air and releasing negative ions as claimed in claim 1, wherein the preparation method of the modified montmorillonite is as follows:
adding 1-4 parts of montmorillonite into 20-50 parts of deionized water, and stirring at the rotating speed of 60-100 rpm for 80-150 min to obtain a suspension;
adding 1-4 parts of sepiolite into 30-60 parts of nitric acid solution, and stirring at the rotating speed of 80-150 rpm at 70-95 ℃ for 50-80 min to obtain a mixed solution;
and (3) dripping 0.5-2 parts of the mixed solution into 10-20 parts of the suspension, carrying out ultrasonic treatment for 25-40 min, filtering, drying, and grinding to 100-300 meshes to obtain the modified montmorillonite.
6. The material with the effect of purifying air and releasing negative ions as claimed in claim 5, wherein the molar concentration of the nitric acid is 1.5-2.5 mol/L.
7. The material with the functions of purifying air and releasing negative ions as claimed in claim 5, wherein the ultrasonic power is 400-800W.
8. The method for preparing the material with the functions of purifying air and releasing negative ions as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
(1) adding modified titanium dioxide, modified montmorillonite and deionized water into a mixer, and stirring at the rotating speed of 200-400 rpm for 6-10 min;
(2) then adding tourmaline powder, heavy calcium powder, sodium silicate, humic acid, lithopone, silica sol, tea polyphenol, chitosan and magnesium oxide, and stirring at the rotating speed of 600-1000 rpm for 8-15 min to obtain a mixed solution;
(3) filtering and drying the mixed solution to obtain the material with the functions of purifying air and releasing negative ions.
9. The method for preparing the material with the function of purifying air and releasing negative ions according to claim 8, wherein the step (1) is specifically as follows: adding the modified titanium dioxide, the modified montmorillonite and the deionized water into a mixer, and stirring for 8min at the rotating speed of 300 rpm.
10. The use of the material with air purifying and anion releasing effects prepared according to claim 8 in coatings.
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| CN116288870B (en) * | 2023-03-25 | 2024-01-16 | 常州市林克制衣有限公司 | Negative ion fiber blended flame-retardant garment fabric and preparation method thereof |
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