CN113349219B - Anti-freezing disinfectant and preparation method thereof - Google Patents
Anti-freezing disinfectant and preparation method thereof Download PDFInfo
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Abstract
The invention relates to an anti-freezing disinfectant and a preparation method thereof, belonging to the technical field of disinfection. The final product of the disinfectant consists of a disinfecting component, a freezing point depressant, a solvent, a freezing retardant, a surfactant, a synergist, a corrosion inhibitor, water and a pH value regulator; removing the pH value regulator, wherein the mass fraction of each component is as follows based on the sum of the mass of other components in the disinfectant final product as 100 percent: 3 to 10 percent of disinfection components, 20 to 50 percent of freezing point depressant, 3 to 8 percent of solvent, 1 to 10 percent of freezing retardant, 2 to 5 percent of surfactant, 0.5 to 2 percent of synergist, 0.2 to 1 percent of corrosion inhibitor and the balance of water; and adjusting the pH value of the disinfectant to 7.0-8.5 by using a pH value regulator. The disinfectant has good antifreezing effect, good sterilizing effect, small corrosivity to metal and no corrosivity to plastics.
Description
Technical Field
The invention relates to an anti-freezing disinfectant and a preparation method thereof, belonging to the technical field of disinfection.
Background
The disinfectants commonly used for disinfection of articles at present are: chlorine-containing disinfectants, peroxide disinfectants, quaternary ammonium salt disinfectants; these disinfectants have poor sterilizing effect at low temperature, and the sterilizing effect is exponentially reduced with the reduction of the temperature, so that the sterilizing effect of the disinfectants has a large relationship with the temperature. The effective disinfectant is used at normal temperature, and when the disinfectant is used at low temperature, the disinfection effect is greatly reduced and even loses efficacy, so that in order to realize effective disinfection, the problem can be solved only by increasing the concentration of the disinfectant, but the corrosivity of the disinfectant to articles is increased, and the disinfection cost is increased; in addition, when the temperature is lower than 0 ℃, some disinfectants are frozen and cannot be used, and need to be heated and dissolved for use, so that the energy consumption is increased, and the efficiency is low.
According to WS/T774-2021 "evaluation standard of on-site disinfection during New coronary pneumonia epidemic situation", the low-temperature disinfection is defined, namely the disinfection of environment or articles with the temperature below 0 ℃. Low temperature sterilization requires the use of sterilization factors that have proven effective at this temperature. The disinfectant capable of being used at low temperature at present is chlorine-containing disinfectant containing organic chlorine compounds, and the chlorine-containing disinfectant has the following problems when in use: firstly, the disinfection effect at low temperature is unsatisfactory; secondly, organic chlorine compounds in the chlorine-containing disinfectant contact with water to form carcinogenic substances, namely trichloromethane, which are harmful to human health; third, such chlorine-containing disinfectants are corrosive to both metals and plastics; fourthly, some of these chlorine-containing disinfectants require mixing on site for use, which is cumbersome.
Disclosure of Invention
In view of the above, the present invention is to provide an antifreeze disinfectant and a preparation method thereof, wherein the disinfectant has a good antifreeze effect, has a freezing point below-18 ℃, can disinfect an environment or an article at a temperature below 0 ℃, and has a good sterilization effect, low corrosivity to metals, and no corrosivity to plastics.
In order to achieve the purpose of the invention, the following technical scheme is provided.
An antifreeze disinfectant, the final product of the disinfectant consists of a disinfectant component, a freezing point depressant, a solvent, a freezing retardant, a surfactant, a synergist, a corrosion inhibitor, water and a pH value regulator.
Removing the pH value regulator, wherein the mass fraction of each component is as follows based on the sum of the mass of other components in the disinfectant final product as 100 percent: 3 to 10 percent of disinfection components, 20 to 50 percent of freezing point depressant, 3 to 8 percent of solvent, 1 to 10 percent of freezing retardant, 2 to 5 percent of surfactant, 0.5 to 2 percent of synergist, 0.2 to 1 percent of corrosion inhibitor and the balance of water;
and adjusting the pH value of the disinfectant to 7.0-8.5 by using a pH value regulator.
Wherein the disinfecting component is a peroxide; preferably, the disinfecting component is one or more of hydrogen peroxide, peracetic acid, sodium percarbonate, sodium perborate, carbamide peroxide, and magnesium monoperoxyphthalate hexahydrate.
The freezing point depressant is organic acid salt; preferably, the freezing point depressant is more than one of potassium acetate, sodium acetate, calcium acetate, sodium citrate, potassium formate, sodium formate and potassium diformate.
The solvent is more than one of ethanol, propylene glycol, isopropanol and isobutanol.
The freezing retardant consists of polyacrylic acid derivatives and polyacrylamide, and the mass ratio of the polyacrylic acid derivatives to the polyacrylamide is 1: 9-1: 1.5.
Preferably, the polyacrylic acid derivative is polyhydroxypropylacrylate, tert-butyl polyacrylate, isobutyl polyacrylate, isodecyl polyacrylate, lauryl polyacrylate or n-butyl polyacrylate.
Preferably, the polyacrylamide is cationic polyacrylamide with the molecular weight of 500-1500 ten thousand.
The surfactant is an amphoteric surfactant; preferably, the surfactant is one or more of cocamidopropyl betaine, lauramidopropyl betaine, cocamidopropyl hydroxysultaine, lauramidopropyl amine oxide, and sodium lauryl amphoacetate.
The synergist is ferrous chloride (FeCl) 2 ) Copper nitrate (Cu (NO) 3 ) 2 ) Potassium bicarbonate (KHCO) 3 ) Potassium molybdate (KMoO) 4 ) Or tetraacetylethylenediamine.
The corrosion inhibitor is sodium gluconate.
Preferably, the pH value regulator is a potassium carbonate aqueous solution, and the mass fraction of potassium carbonate in the potassium carbonate aqueous solution is 10%.
When the disinfecting component in the disinfectant end product is added as a disinfecting component solution in the disinfectant raw material, the water comprises water in the disinfecting component solution.
Preferably, the water is water with the purity of deionized water or more.
The invention relates to a preparation method of an antifreeze disinfectant, which comprises the following steps:
(1) adding a surfactant into water, and stirring until the surfactant is completely dissolved to obtain a solution a;
(2) adding the solvent, the freezing point depressant and the freezing retardant into the solution a while stirring the solution a, and stirring until the solution a is completely dissolved to obtain a solution b;
(3) adding a disinfection component and/or a disinfection component solution into the solution b, uniformly stirring, adding a synergist and a corrosion inhibitor, stirring until the synergist and the corrosion inhibitor are completely dissolved, adding the rest water, and uniformly stirring to obtain a solution d;
(4) and then, regulating the pH value of the solution d by using a pH value regulator, and continuously stirring until the solution is clear and transparent to obtain the antifreeze disinfectant.
Advantageous effects
1. The antifreeze disinfectant provided by the invention adopts organic acid salt as a freezing point depressant, and simultaneously adopts a polymer, namely a mixture consisting of polyacrylic acid derivatives and polyacrylamide as a freezing retardant, and the freezing point of water is lowered by the freezing point depressant; the freezing retardant is a high molecular compound which can play a bridging role and can delay freezing; the disinfectant has a good anti-freezing effect, and can be guaranteed to be still in a liquid state when used at the temperature of below 0 ℃.
2. The antifreeze disinfectant provided by the invention adopts peroxide as a main disinfection component, can effectively improve the bactericidal activity of the peroxide under a low-temperature condition under the condition of adding the synergist, improves the bactericidal rate below 0 ℃, and does not generate substances harmful to the environment after the peroxide is decomposed.
3. The antifreeze disinfectant provided by the invention greatly reduces the surface tension of the object to be disinfected by combining the solvent and the amphoteric surfactant, ensures that the disinfectant can completely cover the surface of the object under the low-temperature condition, and ensures that the surface of the object to be disinfected is completely sterilized; in addition, the invention adopts short-chain alcohol as a solvent, which can enhance the sterilization effect of the peroxide.
4. The antifreeze disinfectant provided by the invention has small corrosivity of peroxide to metal or plastic, and the auxiliary materials, namely the corrosion inhibitor and the pH value regulator, are matched with a high molecular polymer for use, so that the corrosivity of the peroxide to the metal is further reduced, and the antifreeze disinfectant has no corrosivity to the plastic.
5. The antifreeze disinfectant provided by the invention can be directly used without being prepared on site, so that the operation flow on site is reduced.
6. The preparation method of the antifreeze disinfectant provided by the invention is simple to operate and suitable for industrial production.
Detailed Description
The invention will be described in more detail with reference to specific examples, which should not be construed as limiting the scope of the invention.
Example 1
An antifreeze disinfectant comprises 8kg of 50% hydrogen peroxide solution, 50kg of sodium acetate, 3kg of propylene glycol, 4kg of freezing retardant, 5kg of laurylamidopropyl betaine and 1.5kg of KHCO 3 0.2kg of sodium gluconate, 28.3kg of deionized water and an aqueous potassium carbonate solution.
Therefore, the potassium carbonate aqueous solution is removed, and the mass fractions of the components are as follows, based on the sum of the mass of other components in the disinfectant final product being 100 percent: 4% of hydrogen peroxide, 50% of sodium acetate, 3% of propylene glycol, 4% of freezing retardant, 5% of laurylamidopropyl betaine and KHCO 3 1.5 percent, 0.2 percent of sodium gluconate and the balance of water.
The pH of the disinfectant was adjusted to 8.0 with aqueous potassium carbonate.
The freezing retardant consists of hydroxypropyl polyacrylate and cationic polyacrylamide with the molecular weight of 500 ten thousand, and the mass ratio of the hydroxypropyl polyacrylate to the cationic polyacrylamide with the molecular weight of 500 ten thousand is 1: 9.
The mass fraction of potassium carbonate in the potassium carbonate aqueous solution is 10%.
The preparation method of the antifreeze disinfectant comprises the following specific steps:
(1) adding 20kg of deionized water into a stirring kettle, adding 5kg of lauramidopropyl betaine into the deionized water, and stirring until the lauramidopropyl betaine is completely dissolved to obtain a solution a;
(2) adding 3kg of propylene glycol, 50kg of sodium acetate, 0.4kg of polyhydroxypropyl acrylate and 3.6kg of cationic polyacrylamide with the molecular weight of 500 ten thousand into the solution a while stirring the solution a, and stirring until the solution a is completely dissolved to obtain a solution b;
(3) adding 8kg of hydrogen peroxide solution with the mass fraction of 50% into the solution b, uniformly stirring, adding 1.5kg of potassium bicarbonate and 0.2kg of sodium gluconate, stirring until the potassium bicarbonate and the sodium gluconate are completely dissolved, adding the rest deionized water, and uniformly stirring to obtain a solution d;
(4) and then, regulating the pH value of the solution d to be 8.0 by using a potassium carbonate aqueous solution, and continuously stirring until the solution is clear and transparent to obtain the anti-freezing disinfectant.
Example 2
An antifreeze disinfectant comprises 1.5kg of sodium perborate, 1.5kg of sodium percarbonate, 30kg of potassium formate, 8kg of isopropanol, 1kg of freezing retardant, 2kg of cocamidopropyl betaine and 2kg of FeCl 2 0.8kg of sodium gluconate, 53.2kg of deionized water and an aqueous potassium carbonate solution.
Therefore, the potassium carbonate aqueous solution is removed, and the mass fractions of the components are as follows, wherein the sum of the mass of the other components in the disinfectant final product is 100 percent: sodium perborate of 1.5%, sodium percarbonate of 1.5%, potassium formate of 30%, isopropanol of 8%, freezing retardant of 1%, cocamidopropyl betaine of 2%, FeCl 2 2 percent, 0.8 percent of sodium gluconate and the balance of deionized water.
The disinfectant was adjusted to a pH of 8.2 with an aqueous potassium carbonate solution.
The freezing retardant consists of tert-butyl polyacrylate and cationic polyacrylamide with the molecular weight of 800 ten thousand, and the mass ratio of the tert-butyl polyacrylate to the cationic polyacrylamide with the molecular weight of 800 ten thousand is 1: 4.
The mass fraction of potassium carbonate in the potassium carbonate aqueous solution is 10%.
The preparation method of the antifreeze disinfectant comprises the following specific steps:
(1) adding 50kg of deionized water into a stirring kettle, adding 2kg of cocamidopropyl betaine into the deionized water, and stirring until the cocamidopropyl betaine is completely dissolved to obtain a solution a;
(2) adding 8kg of isopropanol, 30kg of potassium formate, 0.2kg of poly (tert-butyl acrylate) and 0.8kg of cationic polyacrylamide with the molecular weight of 800 ten thousand into the solution a while stirring the solution a, and stirring until the solution a is completely dissolved to obtain a solution b;
(3) adding 1.5kg of sodium perborate and 1.5kg of sodium percarbonate into the solution b, stirring uniformly, and adding 2kg of FeCl 2 And 0.8kg of sodium gluconate, stirring until the sodium gluconate is completely dissolved, adding the rest deionized water, and uniformly stirring to obtain a solution d;
(4) and then, regulating the pH value of the solution d to be 8.2 by using a potassium carbonate aqueous solution, and continuously stirring until the solution is clear and transparent to obtain the anti-freezing disinfectant.
Example 3
An antifreeze disinfectant comprises 10kg magnesium monoperoxyphthalate hexahydrate, 20kg sodium formate, 5kg isopropanol, 10kg freezing retardant, 3kg lauramide propyl ammonium oxide, and 0.5kg Cu (NO) 3 ) 2 1kg of sodium gluconate, 50.5kg of deionized water and an aqueous potassium carbonate solution.
Therefore, the potassium carbonate aqueous solution is removed, and the mass fractions of the components are as follows, based on the sum of the mass of other components in the disinfectant final product being 100 percent: 10% magnesium monoperoxyphthalate hexahydrate, 20% sodium formate, 5% isopropanol, 10% freezing retardant, 3% lauramidopropyl ammonium oxide, Cu (NO) 3 ) 2 0.5 percent, 1 percent of sodium gluconate and the balance of deionized water.
The disinfectant was adjusted to pH 7.8 with an aqueous potassium carbonate solution.
The freezing retardant consists of isobutyl polyacrylate and cationic polyacrylamide with the molecular weight of 1500 ten thousand, and the mass ratio of the isobutyl polyacrylate to the cationic polyacrylamide with the molecular weight of 1500 ten thousand is 1: 1.5.
The mass fraction of potassium carbonate in the potassium carbonate aqueous solution is 10%.
The preparation method of the antifreeze disinfectant comprises the following specific steps:
(1) adding 40kg of deionized water into a stirring kettle, adding 3kg of lauramidopropyl ammonium oxide into the deionized water, and stirring until the lauramidopropyl ammonium oxide is completely dissolved to obtain a solution a;
(2) adding 5kg of isopropanol, 20kg of sodium formate, 4kg of polyisobutyl acrylate and 6kg of cationic polyacrylamide with the molecular weight of 1500 ten thousand into the solution a while stirring the solution a, and stirring until the solution a is completely dissolved to obtain a solution b;
(3) adding 10kg of magnesium monoperoxyphthalate hexahydrate into the solution b, uniformly stirring, and adding 0.5kg of Cu (NO) 3 ) 2 And 1kg of sodium gluconate, stirring until the sodium gluconate is completely dissolved, adding the rest deionized water, and stirring uniformly to obtain a solution d;
(4) and then, regulating the pH value of the solution d to be 7.8 by using a potassium carbonate aqueous solution, and continuously stirring until the solution is clear and transparent to obtain the anti-freezing disinfectant.
Example 4
An antifreeze disinfectant comprises 6kg of sodium percarbonate, 25kg of potassium acetate, 4kg of isopropanol, 8kg of freezing retardant, 2kg of sodium lauryl amphoteric acetate and 0.7kg of KMoO 4 0.8kg of sodium gluconate, 53.5kg of deionized water and an aqueous potassium carbonate solution.
Therefore, the potassium carbonate aqueous solution is removed, and the mass fractions of the components are as follows, based on the sum of the mass of other components in the disinfectant final product being 100 percent: 6% of sodium percarbonate, 25% of potassium acetate, 4% of isopropanol, 8% of freezing retardant, 2% of sodium lauryl amphoacetate, and KMoO 4 0.7 percent of sodium gluconate, 0.8 percent of sodium gluconate and the balance of deionized water.
The pH of the disinfectant was adjusted to 7.5 with aqueous potassium carbonate.
The freezing retardant consists of isodecyl polyacrylate and cationic polyacrylamide with the molecular weight of 1500 ten thousand, and the mass ratio of the isodecyl polyacrylate to the cationic polyacrylamide with the molecular weight of 1500 ten thousand is 3: 7.
The mass fraction of potassium carbonate in the potassium carbonate aqueous solution is 10%.
The preparation method of the antifreeze disinfectant comprises the following specific steps:
(1) adding 20kg of deionized water into a stirring kettle, adding 2kg of sodium lauryl amphoteric acetate into the deionized water, and stirring until the sodium lauryl amphoteric acetate is completely dissolved to obtain a solution a;
(2) adding 4kg of isopropanol, 25kg of potassium acetate, 2.4kg of isodecyl polyacrylate and 5.6kg of cationic polyacrylamide with the molecular weight of 1500 ten thousand into the solution a while stirring the solution a, and stirring until the solution a is completely dissolved to obtain a solution b;
(3) adding 6kg of sodium percarbonate into the solution b, stirring uniformly, adding 0.7kg of KMoO 4 And 0.8kg of sodium gluconate, stirring until the sodium gluconate is completely dissolved, adding the rest deionized water, and uniformly stirring to obtain a solution d;
(4) and then, regulating the pH value of the solution d to be 7.5 by using a potassium carbonate aqueous solution, and continuously stirring until the solution is clear and transparent to obtain the anti-freezing disinfectant.
Example 5
An antifreeze disinfectant comprises the raw materials of 3kg of carbamide peroxide, 3kg of peroxyacetic acid solution with the mass fraction of 23%, 30kg of potassium diformate, 6kg of ethanol, 8kg of freezing retardant, 4kg of cocamidopropyl hydroxysultaine, 0.6kg of tetraacetylethylenediamine, 0.4kg of sodium gluconate, 45kg of deionized water and a potassium carbonate aqueous solution.
Therefore, the potassium carbonate aqueous solution is removed, and the mass fractions of the components are as follows, based on the sum of the mass of other components in the disinfectant final product being 100 percent: 3% of urea hydrogen peroxide, 0.69% of peracetic acid, 30% of potassium diformate, 6% of ethanol, 8% of freezing retardant, 4% of cocamidopropyl hydroxysultaine, 0.6% of tetraacetylethylenediamine, 0.4% of sodium gluconate and the balance of water.
The disinfectant was adjusted to pH 7.0 with an aqueous potassium carbonate solution.
The freezing retardant consists of poly-n-butyl acrylate and cationic polyacrylamide with the molecular weight of 1000 ten thousand, and the mass ratio of the poly-n-butyl acrylate to the cationic polyacrylamide with the molecular weight of 1000 ten thousand is 3: 7.
The mass fraction of potassium carbonate in the potassium carbonate aqueous solution is 10%.
The preparation method of the antifreeze disinfectant comprises the following specific steps:
(1) adding 40kg of deionized water into a stirring kettle, adding 4kg of cocamidopropyl hydroxysultaine into the deionized water, and stirring until the cocamidopropyl hydroxysultaine is completely dissolved to obtain a solution a;
(2) adding 6kg of ethanol, 30kg of potassium diformate, 2.4kg of poly-n-butyl acrylate and 5.6kg of cationic polyacrylamide with the molecular weight of 1000 ten thousand into the solution a while stirring the solution a, and stirring until the solution a is completely dissolved to obtain a solution b;
(3) adding 3kg of carbamide peroxide and 3kg of a peroxyacetic acid solution with the mass fraction of 23% into the solution b, uniformly stirring, adding 0.6kg of tetraacetylethylenediamine and 0.4kg of sodium gluconate, stirring until the tetraacetylethylenediamine and the sodium gluconate are completely dissolved, adding the rest deionized water, and uniformly stirring to obtain a solution d;
(4) and then potassium carbonate aqueous solution is used for adjusting the pH value of the solution d to 7.0, and the solution is continuously stirred until the solution is clear and transparent, so that the antifreeze disinfectant is obtained.
Example 6
An antifreeze disinfectant comprises the raw materials of 5kg of hydrogen peroxide solution with the mass fraction of 50%, 4kg of peracetic acid solution with the mass fraction of 23%, 30kg of potassium formate, 10kg of potassium acetate, 7kg of propylene glycol, 6kg of freezing retardant, 3kg of cocamidopropyl hydroxysultaine, 1.4kg of tetraacetylethylenediamine, 0.3kg of sodium gluconate, 33.3kg of deionized water and potassium carbonate aqueous solution.
Therefore, the potassium carbonate aqueous solution is removed, and the mass fractions of the components are as follows, based on the sum of the mass of other components in the disinfectant final product being 100 percent: 2.5% hydrogen peroxide, 0.92% peracetic acid, 30% potassium formate, 10% potassium acetate, 7% propylene glycol, 6% freezing retardant, 3% cocamidopropyl hydroxysultaine, 1.4% tetraacetylethylenediamine, 0.3% sodium gluconate, and the balance water.
The disinfectant was adjusted to pH 8.5 with aqueous potassium carbonate solution.
The freezing retardant consists of polylauryl acrylate and cationic polyacrylamide with the molecular weight of 700 ten thousand, and the mass ratio of the polylauryl acrylate to the cationic polyacrylamide with the molecular weight of 700 ten thousand is 1: 4.
The mass fraction of potassium carbonate in the potassium carbonate aqueous solution is 10%.
The preparation method of the antifreeze disinfectant comprises the following specific steps:
(1) adding 30kg of deionized water into a stirring kettle, adding 3kg of cocamidopropyl hydroxysultaine into the deionized water, and stirring until the cocamidopropyl hydroxysultaine is completely dissolved to obtain a solution a;
(2) adding 7kg of propylene glycol, 30kg of potassium formate, 10kg of potassium acetate, 1.2kg of polylauryl acrylate and 4.8kg of cationic polyacrylamide with the molecular weight of 700 ten thousand into the solution a while stirring the solution a, and stirring until the solution a is completely dissolved to obtain a solution b;
(3) adding 5kg of hydrogen peroxide solution with the mass fraction of 50% and 4kg of peroxyacetic acid solution with the mass fraction of 23% into the solution b, uniformly stirring, adding 1.4kg of tetraacetylethylenediamine and 0.3kg of sodium gluconate, stirring until the tetraacetylethylenediamine and the sodium gluconate are completely dissolved, adding the rest deionized water, and uniformly stirring to obtain a solution d;
(4) and then, regulating the pH value of the solution d to be 8.5 by using a potassium carbonate aqueous solution, and continuously stirring until the solution is clear and transparent to obtain the anti-freezing disinfectant.
Example 7
An antifreeze disinfectant comprises 3kg of hydrogen peroxide solution with the mass fraction of 50%, 7kg of carbamide peroxide, 25kg of potassium diformate, 15kg of potassium acetate, 4kg of propylene glycol, 3kg of freezing retardant, 4kg of cocamidopropyl betaine and 1.8kg of KHCO 3 0.5kg of sodium gluconate, 36.7kg of deionized water and an aqueous potassium carbonate solution.
Therefore, the aqueous potassium carbonate solution is removed, and the sum of the mass of other components in the disinfectant final product is 100 percentThe mass fraction of each component is: 1.5% hydrogen peroxide, 7% urea hydrogen peroxide, 25% potassium diformate, 15% potassium acetate, 4% propylene glycol, 3% freeze retardant, 4% cocamidopropyl betaine, KHCO 3 1.8 percent, 0.5 percent of sodium gluconate and the balance of water.
The disinfectant was adjusted to pH 8.0 with an aqueous potassium carbonate solution.
The freezing retardant consists of isobutyl polyacrylate and 600 ten thousand cationic polyacrylamide, and the mass ratio of the isobutyl polyacrylate to the 600 ten thousand cationic polyacrylamide is 1: 9.
The mass fraction of potassium carbonate in the potassium carbonate aqueous solution is 10%.
The preparation method of the antifreeze disinfectant comprises the following specific steps:
(1) adding 30kg of deionized water into a stirring kettle, adding 4kg of cocamidopropyl betaine into the deionized water, and stirring until the cocamidopropyl betaine is completely dissolved to obtain a solution a;
(2) adding 4kg of propylene glycol, 25kg of potassium diformate, 15kg of potassium acetate, 0.3kg of polyisobutyl acrylate and 2.7kg of cationic polyacrylamide with the molecular weight of 600 ten thousand into the solution a while stirring the solution a, and stirring until the mixture is completely dissolved to obtain a solution b;
(3) adding 3kg of hydrogen peroxide solution with the mass fraction of 50% and 7kg of carbamide peroxide into the solution b, stirring uniformly, and adding 1.8kg of KHCO 3 And 0.5kg of sodium gluconate, stirring until the sodium gluconate is completely dissolved, adding the rest deionized water, and stirring uniformly to obtain a solution d;
(4) and then potassium carbonate aqueous solution is used for adjusting the pH value of the solution d to be 8.0, and the solution is continuously stirred until the solution is clear and transparent, so that the antifreeze disinfectant is obtained.
Example 8
An antifreeze disinfectant comprises 3kg of sodium perborate, 20kg of sodium citrate, 18kg of calcium acetate, 4kg of propylene glycol, 7kg of freezing retardant, 4kg of cocamidopropyl betaine, 1kg of lauramidopropyl betaine and 1kg of KMoO 4 0.5kg of sodium gluconate, 41.5kg of deionized water andaqueous potassium carbonate solution.
Therefore, the potassium carbonate aqueous solution is removed, and the mass fractions of the components are as follows, wherein the sum of the mass of the other components in the disinfectant final product is 100 percent: sodium perborate 3%, sodium citrate 20%, calcium acetate 18%, propylene glycol 4%, freezing retardant 7%, cocamidopropyl betaine 4%, lauramidopropyl betaine 1%, KMoO 4 1 percent, 0.5 percent of sodium gluconate and the balance of deionized water.
The disinfectant was adjusted to pH 8.5 with aqueous potassium carbonate solution.
The freezing retardant consists of tert-butyl polyacrylate and cationic polyacrylamide with the molecular weight of 750 ten thousand, and the mass ratio of the tert-butyl polyacrylate to the cationic polyacrylamide with the molecular weight of 750 ten thousand is 1: 1.5.
The mass fraction of potassium carbonate in the potassium carbonate aqueous solution is 10%.
The preparation method of the antifreeze disinfectant comprises the following specific steps:
(1) adding 30kg of deionized water into a stirring kettle, adding 4kg of cocamidopropyl betaine and 1kg of lauramidopropyl betaine into the deionized water, and stirring until the cocamidopropyl betaine and the lauramidopropyl betaine are completely dissolved to obtain a solution a;
(2) adding 4kg of propylene glycol, 20kg of sodium citrate, 18kg of calcium acetate, 2.8kg of poly (tert-butyl acrylate) and 4.2kg of cationic polyacrylamide with the molecular weight of 750 ten thousand into the solution a while stirring the solution a, and stirring until the solution a is completely dissolved to obtain a solution b;
(3) adding 3kg of sodium perborate into the solution b, stirring uniformly, and adding 1kg of KMoO 4 And 0.5kg of sodium gluconate, stirring until the sodium gluconate is completely dissolved, adding the rest deionized water, and stirring uniformly to obtain a solution d;
(4) and then, regulating the pH value of the solution d to be 8.5 by using a potassium carbonate aqueous solution, and continuously stirring until the solution is clear and transparent to obtain the anti-freezing disinfectant.
The antifreeze disinfectants in the embodiments 1 to 8 are respectively subjected to a low-temperature freezing test, a low-temperature sterilization performance test, a metal corrosion test and a plastic corrosion test.
Wherein, the low-temperature freezing test refers to GB/T2430-; the viscosities of the antifreeze disinfectants of examples 1 to 8 at-20 ℃ were measured in accordance with ASTM D445 "test for kinematic viscosity (and calculation of kinematic viscosity) of transparent and opaque liquids", and the test results are shown in Table 2.
And (3) testing the low-temperature sterilization performance: the anti-freeze disinfectants of examples 1-8 were tested for the killing rate of escherichia coli and staphylococcus aureus at-20 ℃ and-40 ℃ respectively, with reference to the test methods specified in the disinfection technical Specification (2002 edition) issued by the ministry of health, the test time being 30min, and the test results being shown in Table 3.
And (3) testing the metal corrosivity: the corrosion of the antifreeze disinfectants in the embodiments 1-8 on stainless steel and aluminum is tested according to the corrosion test method specified in JB/T4323.2 Water-based Metal Cleaner test method, and the test results are shown in Table 4.
The plastic corrosivity test method comprises the following steps: the influence of the antifreeze disinfectants in the examples 1-8 on the polypropylene plastics is tested by referring to the test method specified in MH/T6067-2010 polyacrylic plastics stress crazing test method contacting liquid or semi-liquid compounds, and the test results are shown in Table 5.
The test results of the above tests are as follows:
1. low temperature freezing test
The freezing points of the antifreeze disinfectants of the embodiments are shown in table 1; the viscosity test results are shown in table 2.
TABLE 1 freezing point test results
| Test items | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 | Example 8 |
| Freezing point/. degree.C | -54 | -33 | -24 | -56.5 | -38 | -46 | -43.5 | -41 |
Table 2 viscosity test results
As can be seen from Table 1, the freezing points of the antifreeze disinfectants of the embodiments are all lower than-18 ℃, so that the antifreeze disinfectants can be applied to the environment of-18 ℃; in addition, the freezing points of the antifreeze disinfectants of the embodiments 1, 4, 6, 7 and 8 can reach below-40 ℃, can adapt to the application environment with lower temperature, and has wider application range; therefore, the antifreeze disinfectant disclosed by the invention can not be solidified at the temperature of-18 ℃, has good antifreeze performance, and can be directly used for disinfecting the surface of a frozen object.
In addition, as can be seen from table 2, the anti-freeze disinfectants of the examples have no obvious viscosity increase at-20 ℃, which shows that the anti-freeze disinfectants of the examples have good fluidity and spreadability at-20 ℃.
2. Low temperature sterilization Performance test
TABLE 3 test results of low-temperature sterilization performance
As can be seen from the table 3, the anti-freezing disinfectant of each embodiment has the killing rate of more than 97 percent on escherichia coli and staphylococcus aureus at the temperature of 20 ℃ below zero, and has good bactericidal performance; in addition, the antifreeze disinfectants of the embodiments 1, 3, 4, 6, 7 and 8 have the killing rate of over 99 percent on escherichia coli and staphylococcus aureus at the temperature of 20 ℃ below zero, and have very excellent bactericidal performance.
In addition, under the condition of-40 ℃, the killing rate of the antifreeze disinfectants of the embodiments 1, 4, 6, 7 and 8 on escherichia coli and staphylococcus aureus reaches more than 99 percent, and the antifreeze disinfectants have very excellent bactericidal performance and meet the bactericidal requirement on the surface of the frozen article. The antifreeze disinfectants of examples 2, 3 and 5 are solid at-40 ℃ and cannot be tested.
In conclusion, the antifreeze disinfectant can keep the liquid flowing state at the temperature of-20 ℃ to-40 ℃ and can also ensure the high-efficiency sterilization performance on the surface of a frozen object.
3. Metal corrosion testing
TABLE 4 metallic Corrosion test results
After the corrosion test, the appearances of the metal surfaces of the stainless steel material and the aluminum material are not changed, which shows that the corrosion resistance of the antifreeze disinfectant of each embodiment to the metal is not obvious from the appearance of the metal. From the weight change before and after the corrosion test of the metal material, the mass loss of the stainless steel metal after the corrosion test is less than or equal to 0.31mg, which shows that the antifreeze disinfectant of each embodiment has little influence on the stainless steel metal material. After the corrosion test, the mass loss of the metal made of the aluminum material is distributed in the range of 0.61mg to 1.23mg, and the corrosion of the metal made of the aluminum material in the examples 3 and 6 is slightly large, but the mass loss of the aluminum material is not more than 1.3mg, so that the mass loss has small influence on the material. Therefore, in conclusion, the antifreeze disinfectant disclosed by the invention has low corrosiveness to metal materials.
4. Plastics corrosivity test
TABLE 5 test results of corrosion properties of plastics
As can be seen from the results in Table 5, after the polypropylene plastic is tested, no silver line or crack is generated in the appearance, which shows that the antifreeze disinfectant of the embodiments of the present invention has no influence on the polypropylene plastic and no corrosivity is generated.
The present invention includes, but is not limited to, the above embodiments, and any equivalent substitutions or partial modifications made under the principle of the present invention should be considered within the scope of the present invention.
Claims (7)
1. An antifreeze disinfectant, which is characterized in that: the final product of the disinfectant consists of a disinfecting component, a freezing point depressant, a solvent, a freezing retardant, a surfactant, a synergist, a corrosion inhibitor, water and a pH value regulator;
removing the pH value regulator, wherein the mass fraction of each component is as follows based on the sum of the mass of other components in the disinfectant final product as 100 percent: 3-10% of disinfection components, 20-50% of freezing point depressant, 3-8% of solvent, 1-10% of freezing retardant, 2-5% of surfactant, 0.5-2% of synergist, 0.2-1% of corrosion inhibitor and the balance of water;
adjusting the pH value of the disinfectant to 7.0-8.5 by using a pH value regulator;
the disinfecting component is peroxide;
the freezing point depressant is more than one of potassium acetate, sodium acetate, calcium acetate, sodium citrate, potassium formate, sodium formate and potassium diformate;
the solvent is more than one of ethanol, propylene glycol, isopropanol and isobutanol;
the freezing retardant consists of a polyacrylic acid derivative and polyacrylamide, and the mass ratio of the polyacrylic acid derivative to the polyacrylamide is 1: 9-1: 1.5; the polyacrylic acid derivative is polyhydroxypropyl acrylate, tert-butyl polyacrylate, isobutyl polyacrylate, isodecyl polyacrylate, lauryl polyacrylate or n-butyl polyacrylate; the polyacrylamide is cationic polyacrylamide with the molecular weight of 500-1500 ten thousand;
the surfactant is an amphoteric surfactant;
the synergist is ferrous chloride, copper nitrate, potassium bicarbonate, potassium molybdate or tetraacetylethylenediamine;
the corrosion inhibitor is sodium gluconate.
2. A deicing disinfectant as set forth in claim 1, wherein: the disinfection component is more than one of hydrogen peroxide, peracetic acid, sodium percarbonate, sodium perborate, carbamide peroxide and magnesium monoperoxyphthalate hexahydrate.
3. A deicing disinfectant as set forth in claim 1, wherein: the surfactant is more than one of cocamidopropyl betaine, lauramidopropyl betaine, cocamidopropyl hydroxysultaine, lauramidopropyl amine oxide and sodium lauryl amphoacetate.
4. The antifreeze disinfectant as set forth in claim 1, wherein: the pH value regulator is a potassium carbonate aqueous solution, and the mass fraction of potassium carbonate in the potassium carbonate aqueous solution is 10%.
5. The antifreeze disinfectant as set forth in claim 1, wherein: the water is more than deionized water.
6. A deicing disinfectant as set forth in claim 1, wherein: the disinfection component is more than one of hydrogen peroxide, peracetic acid, sodium percarbonate, sodium perborate, carbamide peroxide and magnesium monoperoxyphthalate hexahydrate;
the surfactant is more than one of cocamidopropyl betaine, lauramidopropyl betaine, cocamidopropyl hydroxysultaine, lauramidopropyl amine oxide and sodium lauryl amphoacetate;
the pH value regulator is a potassium carbonate aqueous solution, and the mass fraction of potassium carbonate in the potassium carbonate aqueous solution is 10%;
the water is water with the purity of deionized water above.
7. A method for preparing an antifreeze disinfectant as claimed in any one of claims 1 to 6, wherein: the preparation method comprises the following steps:
(1) adding a surfactant into water, and stirring until the surfactant is completely dissolved to obtain a solution a;
(2) adding a solvent, a freezing point depressant and a freezing retardant into the solution a while stirring the solution a, and stirring until the solution a is completely dissolved to obtain a solution b;
(3) adding a disinfection component and/or a disinfection component solution into the solution b, uniformly stirring, adding a synergist and a corrosion inhibitor, stirring until the synergist and the corrosion inhibitor are completely dissolved, adding the rest water, and uniformly stirring to obtain a solution d;
(4) and then, regulating the pH value of the solution d by using a pH value regulator, and continuously stirring until the solution is clear and transparent to obtain the antifreeze disinfectant.
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