CN109020387B - Graphene oxide and diatom ooze composite material and preparation method thereof - Google Patents
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Abstract
The invention discloses a graphene oxide diatom ooze composite material which comprises the following components in parts by weight: 30-35 parts of diatomite, 9-16 parts of calcium carbonate, 16-28 parts of quartz sand, 6-15 parts of kaolin, 3-6 parts of white cement, 0.5-2 parts of rubber powder, 0.8-2 parts of hydroxypropyl methyl cellulose, 0-1.8 parts of flax fiber and graphene oxide/TiO25-9 parts of a composite catalyst. According to the invention, by compounding the graphene oxide and the diatom ooze material and optimizing the proportion of the components, the heat dissipation of the material is greatly improved, the material has a better flame retardant effect, the humidity regulation performance and the mechanical property of the diatom ooze are improved, the photocatalytic efficiency of titanium dioxide is improved, indoor volatile organic compounds are rapidly and effectively decomposed, air is purified, and the air quality of an indoor environment is improved.
Description
Technical Field
The invention relates to the technical field of diatom oozes, and particularly relates to a graphene oxide diatom ooze composite material and a preparation method thereof.
Background
With the development of social economy and the improvement of the living standard of people, the types of decorative materials for building decoration are more and more, and the decoration is gradually complicated. Because the interior decoration material slowly releases pollutants, the discharge of indoor air pollutants is extremely easy to exceed the standard, and if the indoor air cannot be purified in time, the health of people is seriously threatened. Formaldehyde is a substance with pungent smell, strong toxicity and strong volatility, is one of the main pollutants of indoor air at present, and can generate adverse effects on the respiratory tract of a human body. With the improvement of environmental protection consciousness of people, various decoration materials for removing formaldehyde are produced.
The diatomite is formed by depositing marine organism diatom remains for thousands of years, the main component of the diatomite is amorphous silicon dioxide, a large number of nano-scale micropores are distributed on the surface of the diatomite, and the diatomite has the advantages of light weight, porosity, high strength, wear resistance, sound absorption, no toxicity, no odor, good chemical stability and the like, and is widely applied to interior wall decoration materials. The diatom ooze takes the diatomite as a main functional filler, the inorganic cementing material and the auxiliary agent are added, the components such as titanium dioxide and the like are doped into the diatomite, the formaldehyde decomposition effect is achieved, the diatom ooze material does not release harmful substances, no pungent smell is generated, and the diatom ooze is an environment-friendly decoration material. However, titanium dioxide is a wide band gap semiconductor, absorbs only a small fraction of the ultraviolet light, has relatively low photocatalytic activity, and results in low efficiency of titanium dioxide in the photocatalytic removal of formaldehyde, and needs to be improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a graphene oxide and diatom ooze composite material and a preparation method thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the graphene oxide and diatom ooze composite material comprises the following components in parts by weight: 30-35 parts of diatomite, 9-16 parts of calcium carbonate, 16-28 parts of quartz sand, 6-15 parts of kaolin, 3-6 parts of white cement, 0.5-2 parts of rubber powder, 0.8-2 parts of hydroxypropyl methyl cellulose, 0-1.8 parts of flax fiber and graphene oxide/TiO25-9 parts of a composite catalyst.
In the invention, graphene oxide/TiO is adopted2Composite catalyst for improving TiO content by graphene oxide2The photocatalytic activity of the diatom ooze composite material is improved, and therefore the capability of the diatom ooze composite material in decomposing formaldehyde and purifying air is improved. Meanwhile, the mechanical property and the heat dissipation of the composite material can be improved by adding the graphene oxide, and the composite material has a good flame-retardant effect.
As a preferred embodiment of the graphene oxide diatom ooze composite material, the graphene oxide/TiO2In the composite catalyst, graphene oxide and TiO2The weight ratio of (A) to (B) is 0.1-0.25: 1.
As a preferred embodiment of the graphene oxide diatom ooze composite material, the graphene oxide/TiO2In the composite catalyst, graphene oxide and TiO2In a weight ratio of 0.15: 1.
As a preferred embodiment of the graphene oxide diatom ooze composite material, the graphene oxide/TiO2The preparation method of the composite catalyst comprises the following steps: adding graphene oxide into absolute ethyl alcohol, performing ultrasonic dispersion, and adding hydrochloric acid andcarrying out ultrasonic treatment on deionized water for 2-3 h, adding ammonium sulfate, uniformly stirring, adding butyl titanate, aging for 4-6 h, carrying out hydrothermal reaction at 120-160 ℃ for 12-24 h, centrifuging, washing, precipitating and drying to obtain the graphene oxide/TiO2And (3) compounding a catalyst.
As a preferred embodiment of the graphene oxide and diatom ooze composite material, the diatomite is graphene oxide modified diatomite.
As a preferred embodiment of the graphene oxide and diatom ooze composite material, the preparation method of the graphene oxide modified diatomite comprises the following steps: weighing graphene oxide and diatomite according to the weight ratio of 0.01-0.05: 1; adding graphene oxide into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain a graphene oxide suspension; adding diatomite into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain a diatomite suspension; dropwise adding the graphene oxide suspension into the diatomite suspension, stirring at 2000-3000 rpm for 1-2 h, performing ultrasonic dispersion for 0.5-1 h, filtering, washing, and drying to obtain the graphene oxide modified diatomite.
The heat dissipation and mechanical strength of the prepared diatom ooze material can be effectively improved by adding the graphene oxide into the diatomite, but the graphene oxide has high surface energy and strong pi-pi interaction, so that the graphene oxide is easy to agglomerate in the diatomite. According to the invention, the uniformly dispersed graphene oxide suspension and the diatomite suspension are obtained through ultrasonic treatment, the graphene oxide is positively charged, the surface of the diatomite is negatively charged, and the graphene oxide and the diatomite are loaded into the diatomite through electrostatic interaction, so that the dispersibility of the graphene oxide in the diatomite is improved.
In a preferred embodiment of the graphene oxide and diatom ooze composite material, the weight ratio of graphene oxide to diatomite in the graphene oxide-modified diatomite is 0.02: 1.
In a preferred embodiment of the graphene oxide-diatom ooze composite material, the mass fraction of graphene oxide in the graphene oxide suspension is 5-10%, and the mass fraction of diatomite in the diatomite suspension is 10-20%.
The graphene oxide and diatom ooze composite material provided by the invention comprises the following components in parts by weight: 32 parts of diatomite, 10 parts of calcium carbonate, 20 parts of quartz sand, 9 parts of kaolin, 5 parts of white cement, 1.6 parts of rubber powder, 1 part of hydroxypropyl methyl cellulose, 1.2 parts of flax fiber and graphene oxide/TiO27 parts of composite catalyst.
The invention also provides a preparation method of the graphene oxide diatom ooze composite material, which comprises the following steps:
(1) weighing raw materials of each component according to a proportion;
(2) mixing diatomite and graphene oxide/TiO2And adding the composite catalyst into a mixer, mixing for 3-4 hours, adding calcium carbonate, quartz sand, kaolin, white cement, rubber powder, hydroxypropyl methyl cellulose and flax fiber, mixing for 4-5 hours, and packaging to obtain the graphene oxide and diatom ooze composite material.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, by compounding the graphene oxide and the diatom ooze material and optimizing the proportion of the components, the heat dissipation of the material is greatly improved, the material has a better flame retardant effect, the humidity regulation performance and the mechanical property of the diatom ooze are improved, the photocatalytic efficiency of titanium dioxide is improved, indoor volatile organic compounds are rapidly and effectively decomposed, air is purified, and the air quality of an indoor environment is improved.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples. It will be understood by those skilled in the art that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the examples, the experimental methods used were all conventional methods unless otherwise specified, and the materials, reagents and the like used were commercially available without otherwise specified.
Example 1
The graphene oxide and diatom ooze composite material comprises the following components in parts by weight: 32 parts of diatomite and calcium carbonate10 parts of quartz sand 20 parts, 9 parts of kaolin, 5 parts of white cement, 1.6 parts of rubber powder, 1 part of hydroxypropyl methyl cellulose, 1.2 parts of flax fiber and graphene oxide/TiO27 parts of composite catalyst, wherein the graphene oxide/TiO2In the composite catalyst, graphene oxide and TiO2In a weight ratio of 0.15: 1.
The graphene oxide/TiO2The preparation method of the composite catalyst comprises the following steps: adding graphene oxide into absolute ethyl alcohol for ultrasonic dispersion, adding hydrochloric acid and deionized water for continuous ultrasonic treatment for 2 hours, adding ammonium sulfate, uniformly stirring, adding butyl titanate, aging for 5 hours, carrying out hydrothermal reaction at 120-160 ℃ for 18 hours, centrifuging, washing and precipitating, and drying to obtain the graphene oxide/TiO2And (3) compounding a catalyst.
The preparation method of the graphene oxide and diatom ooze composite material comprises the following steps:
(1) weighing raw materials of each component according to a proportion;
(2) mixing diatomite and graphene oxide/TiO2And adding the composite catalyst into a mixer, mixing for 3 hours, adding calcium carbonate, quartz sand, kaolin, white cement, rubber powder, hydroxypropyl methyl cellulose and flax fiber, mixing for 4 hours, and packaging to obtain the graphene oxide and diatom ooze composite material.
Comparative example 1
The graphene oxide and diatom ooze composite material comprises the following components in parts by weight: 32 parts of diatomite, 10 parts of calcium carbonate, 12 parts of quartz sand, 9 parts of kaolin, 5 parts of white cement, 1.6 parts of rubber powder, 1 part of hydroxypropyl methyl cellulose and 1.2 parts of flax fiber.
The preparation method of the graphene oxide and diatom ooze composite material comprises the following steps:
(1) weighing raw materials of each component according to a proportion;
(2) adding diatomite, calcium carbonate, quartz sand, kaolin, white cement, rubber powder, hydroxypropyl methyl cellulose and flax fiber into a mixer, mixing for 4 hours, and packaging to obtain the diatom ooze composite material.
Example 2
Oxygen gasThe graphene diatom ooze composite material comprises the following components in parts by weight: 32 parts of graphene oxide modified diatomite, 20 parts of calcium carbonate, 20 parts of quartz sand, 9 parts of kaolin, 5 parts of white cement, 1.6 parts of rubber powder, 1 part of hydroxypropyl methyl cellulose, 1.2 parts of flax fiber and graphene oxide/TiO27 parts of composite catalyst, wherein the graphene oxide/TiO2In the composite catalyst, graphene oxide and TiO2In a weight ratio of 0.15: 1; in the graphene oxide modified diatomite, the weight ratio of graphene oxide to diatomite is 0.02: 1.
The graphene oxide/TiO2The preparation method of the composite catalyst comprises the following steps: adding graphene oxide into absolute ethyl alcohol for ultrasonic dispersion, adding hydrochloric acid and deionized water for continuous ultrasonic treatment for 3 hours, adding ammonium sulfate, uniformly stirring, adding butyl titanate, aging for 4 hours, carrying out hydrothermal reaction at 120 ℃ for 24 hours, centrifuging, washing and precipitating, and drying to obtain the graphene oxide/TiO2And (3) compounding a catalyst.
The preparation method of the graphene oxide modified diatomite comprises the following steps: weighing graphene oxide and diatomite according to the weight ratio of 0.02: 1; adding graphene oxide into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain a graphene oxide suspension, wherein the mass fraction of the graphene oxide in the graphene oxide suspension is 6%; adding diatomite into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain a diatomite suspension, wherein the mass fraction of the diatomite in the diatomite suspension is 20%; and dropwise adding the graphene oxide suspension into the diatomite suspension, stirring at 2000rpm for 1h, performing ultrasonic dispersion for 0.5h, filtering, washing, and drying to obtain the graphene oxide modified diatomite.
The preparation method of the graphene oxide and diatom ooze composite material comprises the following steps:
(1) weighing raw materials of each component according to a proportion;
(2) mixing diatomite and graphene oxide/TiO2And adding the composite catalyst into a mixer, mixing for 3 hours, adding calcium carbonate, quartz sand, kaolin, white cement, rubber powder, hydroxypropyl methyl cellulose and flax fiber, mixing for 4 hours, and packaging to obtain the graphene oxide and diatom ooze composite material.
Example 3
The graphene oxide and diatom ooze composite material comprises the following components in parts by weight: 32 parts of graphene oxide modified diatomite, 10 parts of calcium carbonate, 20 parts of quartz sand, 9 parts of kaolin, 5 parts of white cement, 1.6 parts of rubber powder, 1 part of hydroxypropyl methyl cellulose, 1.2 parts of flax fiber and graphene oxide/TiO27 parts of composite catalyst, wherein the graphene oxide/TiO2In the composite catalyst, graphene oxide and TiO2In a weight ratio of 0.1: 1; in the graphene oxide modified diatomite, the weight ratio of graphene oxide to diatomite is 0.05: 1.
The graphene oxide/TiO2The preparation method of the composite catalyst comprises the following steps: adding graphene oxide into absolute ethyl alcohol for ultrasonic dispersion, adding hydrochloric acid and deionized water for continuous ultrasonic treatment for 2 hours, adding ammonium sulfate, uniformly stirring, adding butyl titanate, aging for 5 hours, carrying out hydrothermal reaction at 160 ℃ for 12 hours, centrifuging, washing and precipitating, and drying to obtain the graphene oxide/TiO2And (3) compounding a catalyst.
The preparation method of the graphene oxide modified diatomite comprises the following steps: weighing graphene oxide and diatomite according to the weight ratio of 0.05: 1; adding graphene oxide into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain a graphene oxide suspension, wherein the mass fraction of the graphene oxide in the graphene oxide suspension is 5%; adding diatomite into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain a diatomite suspension, wherein the mass fraction of the diatomite in the diatomite suspension is 10%; and dropwise adding the graphene oxide suspension into the diatomite suspension, stirring at 3000rpm for 1h, performing ultrasonic dispersion for 1h, filtering, washing, and drying to obtain the graphene oxide modified diatomite.
The preparation method of the graphene oxide and diatom ooze composite material comprises the following steps:
(1) weighing raw materials of each component according to a proportion;
(2) mixing diatomite and graphene oxide/TiO2Adding the composite catalyst into a mixer, mixing for 4h, adding calcium carbonate, quartz sand, kaolin, white cement, rubber powder, hydroxypropyl methyl cellulose and sodium sulfiteAnd mixing fibrilia for 5h, and packaging to obtain the graphene oxide diatom ooze composite material.
Example 4
The graphene oxide and diatom ooze composite material comprises the following components in parts by weight: 32 parts of graphene oxide modified diatomite, 10 parts of calcium carbonate, 20 parts of quartz sand, 9 parts of kaolin, 5 parts of white cement, 1.6 parts of rubber powder, 1 part of hydroxypropyl methyl cellulose, 1.2 parts of flax fiber and graphene oxide/TiO27 parts of composite catalyst, wherein the graphene oxide/TiO2In the composite catalyst, graphene oxide and TiO2In a weight ratio of 0.25: 1; in the graphene oxide modified diatomite, the weight ratio of graphene oxide to diatomite is 0.01: 1.
The graphene oxide/TiO2The preparation method of the composite catalyst comprises the following steps: adding graphene oxide into absolute ethyl alcohol for ultrasonic dispersion, adding hydrochloric acid and deionized water for continuous ultrasonic treatment for 3 hours, adding ammonium sulfate, uniformly stirring, adding butyl titanate, aging for 6 hours, carrying out hydrothermal reaction at 150 ℃ for 18 hours, centrifuging, washing and precipitating, and drying to obtain the graphene oxide/TiO2And (3) compounding a catalyst.
The preparation method of the graphene oxide modified diatomite comprises the following steps: weighing graphene oxide and diatomite according to the weight ratio of 0.01: 1; adding graphene oxide into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain a graphene oxide suspension, wherein the mass fraction of the graphene oxide in the graphene oxide suspension is 5%; adding diatomite into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain a diatomite suspension, wherein the mass fraction of the diatomite in the diatomite suspension is 10%; and dropwise adding the graphene oxide suspension into the diatomite suspension, stirring at 2500rpm for 1.5h, performing ultrasonic dispersion for 1h, filtering, washing, and drying to obtain the graphene oxide modified diatomite.
The preparation method of the graphene oxide and diatom ooze composite material comprises the following steps:
(1) weighing raw materials of each component according to a proportion;
(2) mixing diatomite and graphene oxide/TiO2After the composite catalyst is added into a mixer and mixed for 4 hours,adding calcium carbonate, quartz sand, kaolin, white cement, rubber powder, hydroxypropyl methyl cellulose and flax fiber, mixing for 4 hours, and packaging to obtain the graphene oxide and diatom ooze composite material.
Example 5
The graphene oxide and diatom ooze composite material comprises the following components in parts by weight: 34 parts of graphene oxide modified diatomite, 15 parts of calcium carbonate, 16 parts of quartz sand, 14 parts of kaolin, 5 parts of white cement, 1.5 parts of rubber powder, 1.8 parts of hydroxypropyl methyl cellulose, 0.5 part of flax fiber and graphene oxide/TiO26 parts of composite catalyst, wherein the graphene oxide/TiO2In the composite catalyst, graphene oxide and TiO2In a weight ratio of 0.2: 1; in the graphene oxide modified diatomite, the weight ratio of graphene oxide to diatomite is 0.04: 1.
The graphene oxide/TiO2The preparation method of the composite catalyst comprises the following steps: adding graphene oxide into absolute ethyl alcohol for ultrasonic dispersion, adding hydrochloric acid and deionized water for continuous ultrasonic treatment for 3 hours, adding ammonium sulfate, uniformly stirring, adding butyl titanate, aging for 6 hours, carrying out hydrothermal reaction at 150 ℃ for 18 hours, centrifuging, washing and precipitating, and drying to obtain the graphene oxide/TiO2And (3) compounding a catalyst.
The preparation method of the graphene oxide modified diatomite comprises the following steps: weighing graphene oxide and diatomite according to the weight ratio of 0.04: 1; adding graphene oxide into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain a graphene oxide suspension, wherein the mass fraction of the graphene oxide in the graphene oxide suspension is 5%; adding diatomite into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain a diatomite suspension, wherein the mass fraction of the diatomite in the diatomite suspension is 10%; and dropwise adding the graphene oxide suspension into the diatomite suspension, stirring at 2500rpm for 1h, performing ultrasonic dispersion for 1h, filtering, washing, and drying to obtain the graphene oxide modified diatomite.
The preparation method of the graphene oxide and diatom ooze composite material comprises the following steps:
(1) weighing raw materials of each component according to a proportion;
(2) mixing diatomite and graphene oxide/TiO2And adding the composite catalyst into a mixer, mixing for 4 hours, adding calcium carbonate, quartz sand, kaolin, white cement, rubber powder, hydroxypropyl methyl cellulose and flax fiber, mixing for 4 hours, and packaging to obtain the graphene oxide and diatom ooze composite material.
Example 6
The graphene oxide and diatom ooze composite material comprises the following components in parts by weight: 30 parts of graphene oxide modified diatomite, 16 parts of calcium carbonate, 25 parts of quartz sand, 15 parts of kaolin, 3 parts of white cement, 2 parts of rubber powder, 0.8 part of hydroxypropyl methyl cellulose, 1.8 parts of flax fiber and graphene oxide/TiO25-9 parts of a composite catalyst, wherein the graphene oxide/TiO is2In the composite catalyst, graphene oxide and TiO2In a weight ratio of 0.16: 1; in the graphene oxide modified diatomite, the weight ratio of graphene oxide to diatomite is 0.04: 1.
The graphene oxide/TiO2The preparation method of the composite catalyst comprises the following steps: adding graphene oxide into absolute ethyl alcohol for ultrasonic dispersion, adding hydrochloric acid and deionized water for continuous ultrasonic treatment for 2 hours, adding ammonium sulfate, uniformly stirring, adding butyl titanate, aging for 5 hours, carrying out hydrothermal reaction at 150 ℃ for 20 hours, centrifuging, washing and precipitating, and drying to obtain the graphene oxide/TiO2And (3) compounding a catalyst.
The preparation method of the graphene oxide modified diatomite comprises the following steps: weighing graphene oxide and diatomite according to the weight ratio of 0.04: 1; adding graphene oxide into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain a graphene oxide suspension, wherein the mass fraction of the graphene oxide in the graphene oxide suspension is 8%; adding diatomite into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain a diatomite suspension, wherein the mass fraction of the diatomite in the diatomite suspension is 16%; and dropwise adding the graphene oxide suspension into the diatomite suspension, stirring at 2500rpm for 1h, performing ultrasonic dispersion for 1h, filtering, washing, and drying to obtain the graphene oxide modified diatomite.
The preparation method of the graphene oxide and diatom ooze composite material comprises the following steps:
(1) weighing raw materials of each component according to a proportion;
(2) mixing diatomite and graphene oxide/TiO2And adding the composite catalyst into a mixer, mixing for 3 hours, adding calcium carbonate, quartz sand, kaolin, white cement, rubber powder, hydroxypropyl methyl cellulose and flax fiber, mixing for 5 hours, and packaging to obtain the graphene oxide and diatom ooze composite material.
Example 7
The graphene oxide and diatom ooze composite material comprises the following components in parts by weight: 35 parts of graphene oxide modified diatomite, 9 parts of calcium carbonate, 28 parts of quartz sand, 6 parts of kaolin, 6 parts of white cement, 0.5 part of rubber powder, 2 parts of hydroxypropyl methyl cellulose and graphene oxide/TiO25-9 parts of a composite catalyst, wherein the graphene oxide/TiO is2In the composite catalyst, graphene oxide and TiO2In a weight ratio of 0.1: 1; in the graphene oxide modified diatomite, the weight ratio of graphene oxide to diatomite is 0.05: 1.
The graphene oxide/TiO2The preparation method of the composite catalyst comprises the following steps: adding graphene oxide into absolute ethyl alcohol for ultrasonic dispersion, adding hydrochloric acid and deionized water for continuous ultrasonic treatment for 2 hours, adding ammonium sulfate, uniformly stirring, adding butyl titanate, aging for 5 hours, carrying out hydrothermal reaction at 150 ℃ for 20 hours, centrifuging, washing and precipitating, and drying to obtain the graphene oxide/TiO2And (3) compounding a catalyst.
The preparation method of the graphene oxide modified diatomite comprises the following steps: weighing graphene oxide and diatomite according to the weight ratio of 0.05: 1; adding graphene oxide into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain a graphene oxide suspension, wherein the mass fraction of the graphene oxide in the graphene oxide suspension is 10%; adding diatomite into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain a diatomite suspension, wherein the mass fraction of the diatomite in the diatomite suspension is 20%; and dropwise adding the graphene oxide suspension into the diatomite suspension, stirring at 2500rpm for 1h, ultrasonically dispersing for 1h, filtering, washing and drying to obtain the graphene oxide modified diatomite.
The preparation method of the graphene oxide and diatom ooze composite material comprises the following steps:
(1) weighing raw materials of each component according to a proportion;
(2) mixing diatomite and graphene oxide/TiO2And adding the composite catalyst into a mixer, mixing for 3.5 hours, adding calcium carbonate, quartz sand, kaolin, white cement, rubber powder and hydroxypropyl methyl cellulose, mixing for 4.5 hours, and packaging to obtain the graphene oxide and diatom ooze composite material.
The bonding strength, humidity control performance, formaldehyde purification effect durability, mold-proof performance, mold-proof durability and combustion performance of the diatom ooze composite materials obtained in examples 1-7 and comparative example 1 were tested according to the specification of standard JC/T2177-2013, and the results are shown in Table 1.
TABLE 1
The results in table 1 show that the addition of graphene oxide is beneficial to improving the photocatalytic efficiency of titanium dioxide, decomposing formaldehyde, purifying air and improving the air quality of indoor environment; the invention has better bonding strength and humidity regulation performance. The high oxygen index indicates that the material is not easy to burn, the low oxygen index indicates that the material is easy to burn, the oxygen index is generally considered to be less than 22 and belongs to a combustible material, the oxygen index is between 22 and 27 and belongs to a flame-retardant material, and through determination, the combustibility of the diatom ooze can reach the A level, the diatom ooze belongs to a flame-retardant material, and a good flame-retardant effect is achieved.
The content of harmful substances in the diatom ooze composite materials of examples 1-7 was detected according to the standard JC/T2177-2013, and the results are shown in Table 2.
TABLE 2
The results in table 2 show that the diatom ooze material of the invention does not contain soluble heavy metals such as lead, volatile organic compounds or free formaldehyde, does not pollute the environment, and is safe and environment-friendly.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. The graphene oxide and diatom ooze composite material is characterized by comprising the following components in parts by weight: 30-35 parts of graphene oxide modified diatomite, 9-16 parts of calcium carbonate, 16-28 parts of quartz sand, 6-15 parts of kaolin, 3-6 parts of white cement, 0.5-2 parts of rubber powder, 0.8-2 parts of hydroxypropyl methyl cellulose, 0-1.8 parts of flax fiber and graphene oxide/TiO25-9 parts of a composite catalyst, wherein the preparation method of the graphene oxide modified diatomite comprises the following steps: weighing graphene oxide and diatomite according to the weight ratio of 0.01-0.05: 1; adding graphene oxide into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain a graphene oxide suspension; adding diatomite into absolute ethyl alcohol, and performing ultrasonic dispersion to obtain a diatomite suspension; dropwise adding the graphene oxide suspension into the diatomite suspension, stirring at 2000-3000 rpm for 1-2 h, performing ultrasonic dispersion for 0.5-1 h, filtering, washing, and drying to obtain the graphene oxide modified diatomite.
2. The graphene oxide diatom ooze composite of claim 1, wherein said graphene oxide/TiO is2In the composite catalyst, graphene oxide and TiO2The weight ratio of (A) to (B) is 0.1-0.25: 1.
3. The graphene oxide diatom ooze composite of claim 1, wherein said graphene oxide/TiO is2In the composite catalyst, graphene oxide and TiO2In a weight ratio of 0.15: 1.
4. The graphene oxide diatom ooze composite of any of claims 1-3, wherein the graphene oxide/TiO is2The preparation method of the composite catalyst comprises the following steps: adding graphene oxide into absolute ethyl alcohol for ultrasonic dispersion, adding hydrochloric acid and deionized water for continuous ultrasonic treatment for 2-3 hours, adding ammonium sulfate for uniform stirring, adding butyl titanate, aging for 4-6 hours, carrying out hydrothermal reaction at 120-160 ℃ for 12-24 hours, centrifuging, washing and precipitating, and drying to obtain the graphene oxide/TiO2And (3) compounding a catalyst.
5. The graphene oxide diatom ooze composite material of claim 1, wherein the graphene oxide-modified diatomaceous earth has a weight ratio of graphene oxide to diatomaceous earth of 0.02: 1.
6. The graphene oxide and diatom ooze composite material of claim 1, wherein the graphene oxide suspension comprises 5-10% by weight graphene oxide and the diatomaceous earth suspension comprises 10-20% by weight diatomaceous earth.
7. The graphene oxide diatom ooze composite material of claim 1, comprising the following components in parts by weight: 32 parts of diatomite, 10 parts of calcium carbonate, 20 parts of quartz sand, 9 parts of kaolin, 5 parts of white cement, 1.6 parts of rubber powder, 1 part of hydroxypropyl methyl cellulose, 1.2 parts of flax fiber and graphene oxide/TiO27 parts of composite catalyst.
8. The preparation method of the graphene oxide and diatom ooze composite material according to any one of claims 1-7, comprising the steps of:
(1) weighing raw materials of each component according to a proportion;
(2) mixing diatomite and graphene oxide/TiO2And adding the composite catalyst into a mixer, mixing for 3-4 hours, adding calcium carbonate, quartz sand, kaolin, white cement, rubber powder, hydroxypropyl methyl cellulose and flax fiber, mixing for 4-5 hours, and packaging to obtain the graphene oxide and diatom ooze composite material.
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| CN113244887B (en) * | 2021-05-17 | 2022-11-08 | 吉林建筑大学 | Preparation method of high-functionality graphene diatomite composite material |
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