Preparation process of novel liquid mildew-proof antibacterial agent

Abstract

The invention relates to the technical field of novel materials, especially coatings, in particular to a preparation process of a novel liquid mildew-proof antibacterial agent. The preparation method comprises the following steps: preparation of an ionic liquid, preparation of a microcapsule mildew-proof material, preparation of a molecular sieve MCM-41-NH2, preparation of a modified molecular sieve Ag / MCM-41-NH2, preparation of a nano composite material, preparation of a liquid antibacterial agent containing nano silver and the like. The mildew-proof antibacterial coating has the advantages of being simple in preparation process, environmentally friendly, excellent in mildew-proof performance, long in antibacterial effect and the like, and can be used in multiple fields of the textile industry, the building industry, the medical protection industry and the like.

Description

Technical Field

[0001] The invention relates to the technical field of new materials, particularly coatings, and in particular to a preparation process of a novel liquid mildew and antibacterial agent. Background Art

[0002] With the rapid development of society and the significant improvement in people's living standards, the public is paying increasing attention to personal health and environmental protection. In recent years, there have been many outbreaks of infectious diseases caused by pathogenic microorganisms around the world. These incidents have not only threatened global public health security, but also brought major impacts to the economy and society.

[0003] Especially in the field of textiles and leather products, since the production process is often in a relatively humid environment, leather and other materials are rich in fat and protein and are very susceptible to microbial invasion, resulting in frequent mildew. Mildew will not only form spots of various colors on the leather surface, but also be difficult to completely remove even after subsequent treatment. This not only reduces the appearance and market value of the product, but also further erodes the leather structure and affects performance. In addition, some molds can produce toxins that are harmful to the human body. Long-term contact may cause serious health problems. Therefore, it has become a social consensus to develop disinfection and antibacterial products that are both environmentally friendly and efficient. Summary of the invention

[0004] In view of the above problems, the present invention provides a preparation process of a novel liquid mildew and antibacterial agent.

[0005] The invention relates to a preparation process of a novel liquid mildewproof and antibacterial agent, comprising the following steps: preparation of ionic liquid, preparation of microcapsule mildewproof material, preparation of molecular sieve MCM-41-NH2, preparation of modified molecular sieve Ag / MCM-41-NH2, preparation of nanocomposite material, and preparation of liquid antibacterial agent containing nanosilver.

[0006] Preferably, in step (1), the preparation of the ionic liquid Add an appropriate amount of trilaurylamine and an appropriate amount of hexadecane bromide into a three-necked flask, add a certain amount of acetonitrile as a solvent, stir under N2 protection, remove the solvent by vacuum distillation, add ethanol to dissolve it, then add an appropriate amount of sodium bis(2-ethylhexyl) phosphate, and after the reaction, vacuum distillation, add n-hexane to the residue, let it stand for a period of time, filter, and collect the filtrate to obtain an ionic liquid; Step (2) Preparation of microcapsule anti-mold material Weigh an appropriate amount of gelatin and an appropriate amount of gum arabic, soak and swell them with an appropriate amount of the ionic liquid in step (1), heat and dissolve them, weigh an appropriate amount of isothiazolinone (OIT, BBIT, BIT), use an emulsifier to make a mixed emulsion, mix the mixed emulsion, gelatin solution and gum arabic solution, add them to a three-necked flask, stir, continue stirring, add warm water, add glutaraldehyde to solidify, continue stirring, let stand overnight, centrifuge the obtained microcapsule suspension for a period of time, wash the precipitate with isopropanol, then wash with anhydrous ethanol, and vacuum dry to obtain a microcapsule anti-mildew material; Step (3) Preparation of molecular sieve MCM-41-NH2 Dissolve MCM-41 (ordered mesoporous silica material) in anhydrous ethanol, add APTES (3-aminopropyltriethoxysilane) dropwise, and add the microcapsule mildew-proof material in step (2) at the same time, stir and reflux, filter the resulting mixed solution and wash it with ethanol and water respectively to remove excess APTES (3-aminopropyltriethoxysilane), thereby obtaining a surface amino-modified molecular sieve MCM-41-NH2; Step (4) Preparation of modified molecular sieve Ag / MCM-41-NH2 Adding nanosilver (Ag) to the molecular sieve MCM-41-NH2 of step (3), and dissolving them together in anhydrous ethanol, then gradually adding ascorbic acid solution dropwise, sealing and stirring in a light-proof manner, then adding an appropriate amount of sodium citrate solution dropwise, filtering the resulting mixed solution, and washing with ethanol and water respectively, to obtain a modified molecular sieve Ag / MCM-41-NH2 loaded with AgNPs; Step (5) Preparation of nanocomposite materials First, water, OP-10 (dodecylphenol polyoxyethylene ether) and SDS (sodium dodecyl sulfate) are added to a three-necked flask, and then the modified molecular sieve Ag / MCM-41-NH2 of step (4) is added, the temperature is raised, emulsified for a period of time, and reacted to obtain a seed emulsion, and then a shell monomer mixture (including KH570) is added to the seed emulsion to react. After the reaction is completed, it is left to cool to room temperature to obtain a silicon-containing acrylic emulsion, MCZ (mixed copper-zinc oxide) is mixed with the acrylic emulsion in a certain proportion, the mixed solution is stirred evenly with a magnetic stirrer, and ultrasonically dispersed for a period of time to obtain a nanocomposite material; Step (6) Preparation of liquid antibacterial agent containing nanosilver Take an appropriate amount of the nanocomposite material of step (5) and add it to the ionic liquid, then add PVP (polyvinyl pyrrolidone), stir and mix evenly to obtain an antibacterial liquid containing nanosilver, then put the pre-prepared aluminum spray into an automated filling device, fill and seal the device, and finally obtain a liquid antibacterial agent containing nanosilver.

[0007] The first technical purpose of the present invention is achieved through the following technical solutions: Preferably, in step (1), the preparation of the ionic liquid 0.1-0.5 mol of trilaurylamine and 0.1-0.5 mol of hexadecane bromide are added into a three-necked flask, and 150-200 mL of acetonitrile is added as a solvent. Under the protection of N2, the reaction is stirred for 70-80 hours, and the solvent is removed by vacuum distillation. Then, 10-20 g of ethanol is added to dissolve it, and then 0.1-0.5 mol of sodium bis(2-ethylhexyl) phosphate is added. After reacting for 24-48 hours, vacuum distillation is performed. n-hexane is added to the residue, and the mixture is allowed to stand for 12-24 hours, and then filtered. The filtrate is collected to obtain an ionic liquid.

[0008] The invention has the advantages that the preparation process is carried out under nitrogen protection, which effectively avoids the occurrence of oxidation side reactions, ensures the high purity of the product, and at the same time can ensure the stability and antibacterial effect of the product. The use of solvents such as acetonitrile and n-hexane not only helps to improve the product yield, but also the prepared ionic liquid has good antibacterial properties.

[0009] Preferably, step (2) preparation of microcapsule anti-mildew material Weigh 10-20 g of gelatin and 15-20 g of gum arabic, soak and swell 10-20 mL of the ionic liquid of step (1), heat and dissolve, weigh 10-20 g of isothiazolinone (OIT, BBIT, BIT), use an emulsifier to make a mixed emulsion, mix the mixed emulsion, gelatin solution and gum arabic solution and add them to a three-necked flask, stir for 1-5 h to adjust the pH value to 3-5, continue stirring for 30-60 min, add 20-50 mL of 50-100 ° C warm water, add 25-50% glutaraldehyde to solidify for 30-60 min, adjust the pH value to 10-20, continue stirring for 20-40 min, stand overnight, centrifuge the obtained microcapsule suspension for 30-60 min, wash the precipitate with isopropanol 1-5 times, wash with anhydrous ethanol 2-6 times, and vacuum dry to obtain a microcapsule mildew-proof material.

[0010] The advantage of adopting the present invention is that the prepared material forms a stable microcapsule structure, which not only improves the sustained release performance of the mildew inhibitor, but also reduces the decomposition and volatilization caused by direct exposure.

[0011] Moreover, adjusting the pH value enhances the stability and mildew-proof effect of the microcapsules, and utilizing preparation processes such as emulsification and solidification ensures the purity and uniformity of the microcapsules.

[0012] The second technical purpose of the present invention is achieved through the following technical solutions: Preferably, step (3) the preparation of molecular sieve MCM-41-NH2 Dissolve 3-10g MCM-41 (ordered mesoporous silica material) in 10-20mL anhydrous ethanol, add 10-20mL APTES (3-aminopropyltriethoxysilane) dropwise, and add 10-20g of the microcapsule mildew-proof material in step (2) at the same time, stir and reflux for 12-24h, filter the obtained mixed solution and wash it with ethanol and water for 3-10 times respectively to remove excess APTES (3-aminopropyltriethoxysilane), thereby obtaining the surface amino-modified molecular sieve MCM-41-NH2.

[0013] The present invention has the advantage that, by combining the microcapsule mildew-proof material of the previous step with MCM-41, the antibacterial component can be continuously released on the surface of the material, ensuring long-term effective protection, ensuring the high purity of the product, and ensuring the stability and antibacterial effect of the product. APTES (3-aminopropyltriethoxysilane) is used for surface amino modification, which improves the surface activity of the molecular sieve MCM-41 and enhances its adsorption capacity and ability to load antibacterial agents.

[0014] Preferably, step (4) preparation of modified molecular sieve Ag / MCM-41-NH2 10-20 g of nanosilver (Ag) is added to 10-20 mL of the molecular sieve MCM-41-NH2 of step (3), and the mixture is dissolved in 15-30 mL of anhydrous ethanol. Then, 0.01-0.05 mol / L of ascorbic acid solution is gradually added dropwise. The mixture is sealed and stirred at 40-60° C. in a dark place for 30-60 min. Then, an appropriate amount of 0.05-0.1 mol / L of sodium citrate solution is added dropwise. The resulting mixed solution is filtered and washed with ethanol and water for 3-10 times, respectively, to obtain a modified molecular sieve Ag / MCM-41-NH2 loaded with AgNPs.

[0015] The invention has the advantage of combining the high-efficiency antibacterial performance of nanosilver with the excellent adsorption performance of the surface amino-modified molecular sieve MCM-41-NH2, thereby ensuring the stability and antibacterial effect of the product and enhancing the adsorption capacity of the molecular sieve Ag / MCM-41-NH2.

[0016] Preferably, step (5) preparation of nanocomposite materials First, 30-60 mL of water, 1.5-5 g of OP-10 (dodecylphenol polyoxyethylene ether) and 0.5-1 g of SDS (sodium dodecyl sulfate) are added to a three-necked flask, and then 10-20 g of the modified molecular sieve Ag / MCM-41-NH2 of step (4) is added, the temperature is raised to 80-100° C., emulsified for 30-60 min, and reacted for 2-6 h to obtain a seed emulsion, and then 10-20 g of a shell monomer mixture (including 5-10 g of KH570) is added to the seed emulsion and reacted for 2-10 h. After the reaction is completed, the mixture is allowed to cool to room temperature to obtain a silicon-containing acrylic emulsion, and MCZ (mixed copper-zinc oxide) is mixed with the acrylic emulsion in a ratio of 1-5:2-5, and the mixed solution is stirred evenly with a magnetic stirrer for 5-10 min at a speed of 500-1000 r / min, and ultrasonically dispersed for 10-20 min to obtain a nanocomposite material.

[0017] The advantage of the present invention is that, by optimizing the emulsification and polymerization conditions, the modified molecular sieve Ag / MCM-41-NH2 loaded with AgNPs is successfully combined with the shell monomer mixed liquid to form a stable silicon-containing acrylic emulsion, and then MCZ (mixed copper-zinc oxide) is introduced and subjected to magnetic stirring and ultrasonic dispersion treatment, thereby ensuring the uniformity and stability of the nano-composite material, improving the heat resistance and corrosion resistance of the nano-composite material, and also having excellent antibacterial and mildew-proof properties, thereby improving the surface activity of the molecular sieve MCM-41, and enhancing its adsorption capacity and ability to load antibacterial agents.

[0018] Preferably, step (6) is the preparation of a liquid antibacterial agent containing nanosilver. Take 2-5g of the nanocomposite material prepared in step (5) and add it to 50-100mL of ionic liquid, then add 0.01-0.05g of PVP (polyvinyl pyrrolidone) and stir for 20-50min to mix evenly to obtain an antibacterial liquid containing nanosilver. Then put the pre-prepared aluminum spray into an automated filling device, which performs filling and sealing to finally obtain a liquid antibacterial agent containing nanosilver.

[0019] The present invention has the advantage that, by mixing the nanocomposite material containing nanosilver with the ionic liquid, the antibacterial component can be continuously released on the liquid surface of the nanosilver, thereby ensuring effective protection for a long time.

[0020] In summary, the present invention has the following beneficial effects: 1. The present invention has the advantages that the preparation process is carried out under nitrogen protection, which effectively avoids the occurrence of oxidation side reactions, ensures the high purity of the product, and at the same time can ensure the stability and antibacterial effect of the product. The use of solvents such as acetonitrile and n-hexane not only helps to improve the product yield, but also the prepared ionic liquid has good antibacterial properties; 2. The advantages of the present invention are that the prepared material forms a stable microcapsule structure, which not only improves the sustained release performance of the mildew inhibitor, reduces the decomposition and volatilization caused by direct exposure, but also adjusts the pH value to enhance the stability and mildew-proof effect of the microcapsules. The preparation processes such as emulsification and curing are used to ensure the purity and uniformity of the microcapsules. 3. The present invention has the advantages that, by combining the microcapsule mildew-proof material of the previous step with MCM-41, the antibacterial component can be continuously released on the surface of the material, ensuring long-term effective protection, ensuring the high purity of the product, and ensuring the stability and antibacterial effect of the product. APTES (3-aminopropyltriethoxysilane) is used for surface amino modification, which improves the surface activity of the molecular sieve MCM-41 and enhances its adsorption capacity and ability to load antibacterial agents; 4. The advantages of the present invention are that it combines the high-efficiency antibacterial performance of nanosilver with the excellent adsorption performance of the surface amino-modified molecular sieve MCM-41-NH2, thereby ensuring the stability and antibacterial effect of the product and enhancing the adsorption capacity of the molecular sieve Ag / MCM-41-NH2; 5. The advantages of the present invention are that, by optimizing the emulsification and polymerization conditions, the modified molecular sieve Ag / MCM-41-NH2 loaded with AgNPs is successfully combined with the shell monomer mixture to form a stable silicon-containing acrylate emulsion, and then MCZ (mixed copper-zinc oxide) is introduced and subjected to magnetic stirring and ultrasonic dispersion treatment, thereby ensuring the uniformity and stability of the nanocomposite material, improving the heat resistance and corrosion resistance of the nanocomposite material, and having excellent antibacterial and mildew-proof properties, improving the surface activity of the molecular sieve MCM-41, and enhancing its adsorption capacity and ability to load antibacterial agents; 6. The present invention has the advantage that, by mixing the nanocomposite material containing nanosilver with the ionic liquid, the antibacterial component can be continuously released on the liquid surface of the nanosilver, thereby ensuring effective protection for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a process flow chart for the preparation of a new type of liquid mildew and antibacterial agent. DETAILED DESCRIPTION

[0022] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention. Without departing from the spirit and substance of the present invention, modifications or substitutions made to the methods, steps or conditions of the present invention are within the scope of the present invention.

[0023] If not specifically stated, the technical means used in the examples are conventional means known to those skilled in the art. In addition, all the raw materials used in the examples are known commercial products. Example 1

[0024] like Figure 1 The preparation process of a new liquid mildew and antibacterial agent is shown in Figure 1 , specifically including: Step (1) Preparation of ionic liquid 0.1 mol of trilaurylamine and 0.1 mol of hexadecane bromide were added to a three-necked flask, and 150 mL of acetonitrile was added as a solvent. Under the protection of N2, the reaction was stirred for 70 hours, and the solvent was removed by vacuum distillation. 10 g of ethanol was added to dissolve it, and then 0.1 mol of sodium bis(2-ethylhexyl) phosphate was added. After reacting for 24 hours, vacuum distillation was performed, and n-hexane was added to the residue. After standing for 12 hours, it was filtered and the filtrate was collected to obtain an ionic liquid; Step (2) Preparation of microcapsule anti-mold material Weigh 10 g of gelatin and 15 g of gum arabic, soak and swell 10 mL of the ionic liquid of step (1), heat and dissolve, weigh 10 g of isothiazolinone (OIT, BBIT, BIT), mix the three with an emulsifier to make a mixed emulsion, mix the mixed emulsion, gelatin solution and gum arabic solution and add them to a three-necked flask, stir for 1 hour to adjust the pH value to 3, continue stirring for 30 minutes, add 20 mL of 50° C. warm water, add 25% glutaraldehyde to solidify for 35 minutes, adjust the pH value to 10, continue stirring for 20 minutes, let stand overnight, centrifuge the obtained microcapsule suspension for 30 minutes, wash the precipitate with isopropanol once, wash it with anhydrous ethanol twice, and vacuum dry it to obtain a microcapsule mildew-proof material; Step (3) Preparation of molecular sieve MCM-41-NH2 Dissolve 3g MCM-41 (ordered mesoporous silica material) in 10mL anhydrous ethanol, add 10mL APTES (3-aminopropyltriethoxysilane) dropwise, and add 10g of the microcapsule mildew-proof material in step (2) together, stir and reflux for 12h, filter the resulting mixed solution and wash it with ethanol and water for 3 times respectively to remove excess APTES (3-aminopropyltriethoxysilane), and obtain the surface amino-modified molecular sieve MCM-41-NH2; Step (4) Preparation of modified molecular sieve Ag / MCM-41-NH2 10 g of nanosilver (Ag) was added to 10 mL of the molecular sieve MCM-41-NH2 prepared in step (3), and the mixture was dissolved in 15 mL of anhydrous ethanol. Then, 0.01 mol / L ascorbic acid solution was gradually added dropwise. The mixture was sealed and stirred at 40°C for 30 min in a dark place. Then, an appropriate amount of 0.05 mol / L sodium citrate solution was added dropwise. The resulting mixed solution was filtered and washed with ethanol and water for 3 times, respectively, to obtain a modified molecular sieve Ag / MCM-41-NH2 loaded with AgNPs. Step (5) Preparation of nanocomposite materials First, 30 mL of water, 1.5 g of OP-10 (dodecylphenol polyoxyethylene ether) and 0.5 g of SDS (sodium dodecyl sulfate) were added to a three-necked flask, and then 10 g of the modified molecular sieve Ag / MCM-41-NH2 of step (4) was added, the temperature was raised to 80°C, emulsified for 30 min, and reacted for 2 h to obtain a seed emulsion, and then 10 g of a shell monomer mixture (including 5 g of KH570) was added to the seed emulsion and reacted for 2 h. After the reaction was completed, the mixture was allowed to cool to room temperature to obtain a silicon-containing acrylic emulsion, and MCZ (mixed copper-zinc oxide) was mixed with the acrylic emulsion in a ratio of 1:2, and the mixed solution was stirred evenly with a magnetic stirrer for 5 min at a speed of 500 r / min and ultrasonically dispersed for 10 min to obtain a nanocomposite material; Step (6) Preparation of liquid antibacterial agent containing nanosilver Take 2 g of the nanocomposite material prepared in step (5) and add it to 50 mL of the ionic liquid. Then add 0.01 g of PVP (polyvinyl pyrrolidone) and stir for 20 min to mix evenly to obtain an antibacterial liquid containing nanosilver. Then put the pre-prepared aluminum spray into an automated filling device, which performs filling and sealing to finally obtain a liquid antibacterial agent containing nanosilver. Example 2

[0025] Step (1) Preparation of ionic liquid 0.2 mol of trilaurylamine and 0.2 mol of hexadecane bromide were added to a three-necked flask, and 160 mL of acetonitrile was added as a solvent. Under the protection of N2, the reaction was stirred for 73 hours, and the solvent was removed by distillation under reduced pressure. 12 g of ethanol was added to dissolve it, and then 0.2 mol of sodium bis(2-ethylhexyl) phosphate was added. After the reaction was continued for 26 hours, distillation was carried out under reduced pressure. n-hexane was added to the residue, and it was allowed to stand for 14 hours, and then filtered. The filtrate was collected to obtain an ionic liquid; Step (2) Preparation of microcapsule anti-mold material Weigh 13 g of gelatin and 16 g of gum arabic, soak and swell 12 mL of the ionic liquid of step (1), heat and dissolve, weigh 12 g of isothiazolinone (OIT, BBIT, BIT), mix the three with an emulsifier to make a mixed emulsion, mix the mixed emulsion, gelatin solution and gum arabic solution and add them to a three-necked flask, stir for 2 h to adjust the pH value to 4, continue stirring for 35 min, add 25 mL of 55° C. warm water, add 30% glutaraldehyde to solidify for 40 min, adjust the pH value to 12, continue stirring for 25 min, stand overnight, centrifuge the obtained microcapsule suspension for 35 min, wash the precipitate with isopropanol twice, wash with anhydrous ethanol three times, and vacuum dry to obtain a microcapsule mildew-proof material; Step (3) Preparation of molecular sieve MCM-41-NH2 Dissolve 5g MCM-41 (ordered mesoporous silica material) in 13mL anhydrous ethanol, add 12mL APTES (3-aminopropyltriethoxysilane) dropwise, and add 12g of the microcapsule mildew-proof material in step (2) together, stir and reflux for 14h, filter the resulting mixed solution and wash it with ethanol and water for 4 times respectively to remove excess APTES (3-aminopropyltriethoxysilane), and obtain the surface amino-modified molecular sieve MCM-41-NH2; Step (4) Preparation of modified molecular sieve Ag / MCM-41-NH2 13 g of nanosilver (Ag) was added to 15 mL of the molecular sieve MCM-41-NH2 prepared in step (3), and the mixture was dissolved in 20 mL of anhydrous ethanol. Then, 0.02 mol / L of ascorbic acid solution was gradually added dropwise. The mixture was sealed and stirred at 45°C for 35 min in a dark place. Then, 0.06 mol / L of sodium citrate solution was added dropwise. The resulting mixed solution was filtered and washed with ethanol and water for 4 times, respectively, to obtain a modified molecular sieve Ag / MCM-41-NH2 loaded with AgNPs. Step (5) Preparation of nanocomposite materials First, 35 mL of water, 2 g of OP-10 (dodecylphenol polyoxyethylene ether) and 0.6 g of SDS (sodium dodecyl sulfate) were added to a three-necked flask, and then 12 g of the modified molecular sieve Ag / MCM-41-NH2 of step (4) was added, the temperature was raised to 85°C, emulsified for 35 min, and reacted for 3 h to obtain a seed emulsion, and then 15 g of a shell monomer mixture (including 5 g of KH570) was added to the seed emulsion and reacted for 3 h. After the reaction was completed, the mixture was allowed to cool to room temperature to obtain a silicon-containing acrylic emulsion, and MCZ (mixed copper-zinc oxide) was mixed with the acrylic emulsion in a ratio of 2:3, and the mixed solution was stirred evenly with a magnetic stirrer for 7 min at a speed of 600 r / min and ultrasonically dispersed for 13 min to obtain a nanocomposite material; Step (6) Preparation of liquid antibacterial agent containing nanosilver Take 3 g of the nanocomposite material prepared in step (5) and add it to 60 mL of the ionic liquid. Then add 0.02 g of PVP (polyvinyl pyrrolidone) and stir for 25 min to mix evenly to obtain an antibacterial liquid containing nanosilver. Then put the pre-prepared aluminum spray into an automated filling device, which performs filling and sealing to finally obtain a liquid antibacterial agent containing nanosilver. Example 3

[0026] Step (1) Preparation of ionic liquid 0.3 mol of trilaurylamine and 0.3 mol of hexadecane bromide were added to a three-necked flask, and 170 mL of acetonitrile was added as a solvent. Under the protection of N2, the mixture was stirred for reaction for 75 h, and the solvent was removed by vacuum distillation. 15 g of ethanol was added to dissolve the mixture, and then 0.3 mol of sodium bis(2-ethylhexyl) phosphate was added. After reaction for 30 h, the mixture was vacuum distilled. N-hexane was added to the residue, and the mixture was allowed to stand for 15 h, and then filtered. The filtrate was collected to obtain an ionic liquid. Step (2) Preparation of microcapsule anti-mold material Weigh 15 g of gelatin and 18 g of gum arabic, soak and swell 16 mL of the ionic liquid of step (1), heat and dissolve, weigh 15 g of isothiazolinone (OIT, BBIT, BIT), mix the three with an emulsifier to make a mixed emulsion, mix the mixed emulsion, gelatin solution and gum arabic solution and add them to a three-necked flask, stir for 4 h to adjust the pH value to 5, continue stirring for 40 min, add 30 mL of 70° C. warm water, add 40% glutaraldehyde to solidify for 50 min, adjust the pH value to 17, continue stirring for 30 min, let stand overnight, centrifuge the obtained microcapsule suspension for 50 min, wash the precipitate with isopropanol 4 times, wash with anhydrous ethanol 5 times, and vacuum dry to obtain a microcapsule mildew-proof material; Step (3) Preparation of molecular sieve MCM-41-NH2 Dissolve 7g of MCM-41 (ordered mesoporous silica material) in 17mL of anhydrous ethanol, add 17mL of APTES (3-aminopropyltriethoxysilane) dropwise, and add 16g of the microcapsule mildew-proof material in step (2) together, stir and reflux for 20h, filter the resulting mixed solution and wash it with ethanol and water for 7 times respectively to remove excess APTES (3-aminopropyltriethoxysilane), and obtain the surface amino-modified molecular sieve MCM-41-NH2; Step (4) Preparation of modified molecular sieve Ag / MCM-41-NH2 17 g of nanosilver (Ag) was added to 17 mL of the molecular sieve MCM-41-NH2 prepared in step (3), and the mixture was dissolved in 25 mL of anhydrous ethanol. A 0.04 mol / L ascorbic acid solution was gradually added dropwise. The mixture was sealed and stirred at 50°C for 40 min in a dark place. A 0.07 mol / L sodium citrate solution was then added dropwise. The resulting mixed solution was filtered and washed with ethanol and water for 7 times, respectively, to obtain a modified molecular sieve Ag / MCM-41-NH2 loaded with AgNPs. Step (5) Preparation of nanocomposite materials First, 50 mL of water, 4 g of OP-10 (dodecylphenol polyoxyethylene ether) and 0.7 g of SDS (sodium dodecyl sulfate) were added to a three-necked flask, and then 17 g of the modified molecular sieve Ag / MCM-41-NH2 of step (4) was added, the temperature was raised to 90°C, emulsified for 50 min, and reacted for 5 h to obtain a seed emulsion, and then 17 g of a shell monomer mixture (including 8 g of KH570) was added to the seed emulsion and reacted for 7 h. After the reaction was completed, the mixture was allowed to cool to room temperature to obtain a silicon-containing acrylic emulsion, and MCZ (mixed copper-zinc oxide) was mixed with the acrylic emulsion in a ratio of 4:4, and the mixed solution was stirred evenly with a magnetic stirrer for 9 min at a speed of 700 r / min and ultrasonically dispersed for 15 min to obtain a nanocomposite material; Step (6) Preparation of liquid antibacterial agent containing nanosilver 4 g of the nanocomposite material prepared in step (5) was added to 70 mL of the ionic liquid, and then 0.03 g of PVP (polyvinyl pyrrolidone) was added and stirred for 30 min to obtain an antibacterial liquid containing nanosilver. The aluminum spray prepared in advance was then placed in an automated filling device, which was used for filling and sealing to finally obtain a liquid antibacterial agent containing nanosilver. Example 4

[0027] Step (1) Preparation of ionic liquid 0.5 mol of trilaurylamine and 0.5 mol of hexadecane bromide were added to a three-necked flask, and 200 mL of acetonitrile was added as a solvent. Under the protection of N2, the reaction was stirred for 80 hours, and the solvent was removed by vacuum distillation. 20 g of ethanol was added to dissolve it, and then 0.5 mol of sodium bis(2-ethylhexyl) phosphate was added. After the reaction was continued for 48 hours, vacuum distillation was performed, and n-hexane was added to the residue. After standing for 24 hours, the residue was filtered and the filtrate was collected to obtain an ionic liquid; Step (2) Preparation of microcapsule anti-mold material Weigh 20 g of gelatin and 20 g of gum arabic, soak and swell 20 mL of the ionic liquid of step (1), heat and dissolve, weigh 20 g of isothiazolinone (OIT, BBIT, BIT), mix the three with an emulsifier to make a mixed emulsion, mix the mixed emulsion, gelatin solution and gum arabic solution and add them to a three-necked flask, stir for 5 hours to adjust the pH value to 5, continue stirring for 60 minutes, add 45 mL of 80° C. warm water, add 50% glutaraldehyde to solidify for 60 minutes, adjust the pH value to 20, continue stirring for 35 minutes, stand overnight, centrifuge the obtained microcapsule suspension for 60 minutes, wash the precipitate with isopropanol 5 times, wash it with anhydrous ethanol 6 times, and vacuum dry it to obtain a microcapsule mildew-proof material; Step (3) Preparation of molecular sieve MCM-41-NH2 Dissolve 10g MCM-41 (ordered mesoporous silica material) in 20mL anhydrous ethanol, add 20mL APTES (3-aminopropyltriethoxysilane) dropwise, and add 20g of the microcapsule mildew-proof material in step (2) together, stir and reflux for 24h, filter the resulting mixed solution and wash it with ethanol and water for 10 times respectively to remove excess APTES (3-aminopropyltriethoxysilane), and obtain the surface amino-modified molecular sieve MCM-41-NH2; Step (4) Preparation of modified molecular sieve Ag / MCM-41-NH2 20 g of nanosilver (Ag) was added to 20 mL of the molecular sieve MCM-41-NH2 prepared in step (3), and the mixture was dissolved in 30 mL of anhydrous ethanol. Then, 0.05 mol / L of ascorbic acid solution was gradually added dropwise. The mixture was sealed and stirred at 60°C for 55 min in a dark place. Then, 0.08 mol / L of sodium citrate solution was added dropwise. The obtained mixed solution was filtered and washed with ethanol and water for 10 times, respectively, to obtain a modified molecular sieve Ag / MCM-41-NH2 loaded with AgNPs. Step (5) Preparation of nanocomposite materials First, 60 mL of water, 5 g of OP-10 (dodecylphenol polyoxyethylene ether) and 1 g of SDS (sodium dodecyl sulfate) were added to a three-necked flask, and then 20 g of the modified molecular sieve Ag / MCM-41-NH2 of step (4) was added, the temperature was raised to 100° C., emulsified for 60 min, and reacted for 6 h to obtain a seed emulsion, and then 20 g of a shell monomer mixture (including 10 g of KH570) was added to the seed emulsion and reacted for 9 h. After the reaction was completed, the mixture was allowed to cool to room temperature to obtain a silicon-containing acrylic emulsion, and MCZ (mixed copper-zinc oxide) was mixed with the acrylic emulsion in a ratio of 5:5, and the mixed solution was stirred evenly with a magnetic stirrer for 10 min at a speed of 900 r / min and ultrasonically dispersed for 17 min to obtain a nanocomposite material; Step (6) Preparation of liquid antibacterial agent containing nanosilver 5 g of the nanocomposite material prepared in step (5) was added to 100 mL of the ionic liquid, and then 0.04 g of PVP (polyvinyl pyrrolidone) was added and stirred for 45 min to obtain an antibacterial liquid containing nanosilver. The aluminum spray prepared in advance was then placed in an automated filling device, which was used for filling and sealing to finally obtain a liquid antibacterial agent containing nanosilver. Comparative Example 1

[0028] Step (1) Preparation of ionic liquid 0.9 mol of trilaurylamine and 0.9 mol of hexadecane bromide were added to a three-necked flask, and 250 mL of acetonitrile was added as a solvent. Under the protection of N2, the reaction was stirred for 90 hours, and the solvent was removed by vacuum distillation. 25 g of ethanol was added to dissolve it, and then 0.7 mol of sodium bis(2-ethylhexyl) phosphate was added. After the reaction was continued for 50 hours, vacuum distillation was performed, and n-hexane was added to the residue. After standing for 30 hours, the residue was filtered and the filtrate was collected to obtain an ionic liquid; Step (2) Preparation of molecular sieve MCM-41-NH2 20 g of MCM-41 (ordered mesoporous silica material) was dissolved in 30 mL of anhydrous ethanol, 29 mL of APTES (3-aminopropyltriethoxysilane) was added dropwise, and 10 mL of the ionic liquid of step (1) was added, and the mixture was stirred and refluxed for 30 h. The resulting mixed solution was filtered and washed with ethanol and water for 15 times respectively to remove excess APTES (3-aminopropyltriethoxysilane), thereby obtaining a surface amino-modified molecular sieve MCM-41-NH2; Step (3) Preparation of modified molecular sieve Ag / MCM-41-NH2 25 g of nanosilver (Ag) was added to 30 mL of the molecular sieve MCM-41-NH2 prepared in step (2), and the mixture was dissolved in 30 mL of anhydrous ethanol. A 0.09 mol / L ascorbic acid solution was gradually added dropwise. The mixture was sealed and stirred at 70°C for 60 min in a dark place. A 0.09 mol / L sodium citrate solution was then added dropwise. The resulting mixed solution was filtered and washed with ethanol and water for 15 times, respectively, to obtain a modified molecular sieve Ag / MCM-41-NH2 loaded with AgNPs. Step (4) Preparation of nanocomposite materials First, 70 mL of water, 7 g of OP-10 (dodecylphenol polyoxyethylene ether) and 8 g of SDS (sodium dodecyl sulfate) were added to a three-necked flask, and then 26 g of the modified molecular sieve Ag / MCM-41-NH2 in step (3) was added. The temperature was raised to 120° C., emulsified for 70 min, and reacted for 9 h to obtain a seed emulsion. Then, 40 g of a shell monomer mixture (including 20 g of KH570) was added to the seed emulsion and reacted for 11 h. After the reaction was completed, the mixture was allowed to cool to room temperature to obtain a silicon-containing acrylic emulsion. MCZ (mixed copper-zinc oxide) was mixed with the acrylic emulsion in a ratio of 7:8, and the mixed solution was stirred evenly with a magnetic stirrer for 15 min at a speed of 1000 r / min and ultrasonically dispersed for 20 min to obtain a nanocomposite material. Step (5) Preparation of liquid antibacterial agent containing nanosilver 8 g of the nanocomposite material prepared in step (4) was added to 120 mL of the ionic liquid, and then 0.05 g of PVP (polyvinyl pyrrolidone) was added and stirred for 50 min to obtain an antibacterial liquid containing nanosilver. The aluminum spray prepared in advance was then placed in an automated filling device, which was used for filling and sealing to finally obtain a liquid antibacterial agent containing nanosilver. Comparative Example 2

[0029] Step (1) Preparation of molecular sieve MCM-41-NH2 20g MCM-41 (ordered mesoporous silica material) was dissolved in 30mL of anhydrous ethanol, 29mL APTES (3-aminopropyltriethoxysilane) was added dropwise, 10mL of ionic liquid was added, and the mixture was stirred and refluxed for 30h. The resulting mixed solution was filtered and washed with ethanol and water for 15 times respectively to remove excess APTES (3-aminopropyltriethoxysilane) to obtain the surface amino-modified molecular sieve MCM-41-NH2; Step (2) Preparation of modified molecular sieve Ag / MCM-41-NH2 25 g of nanosilver (Ag) was added to 30 mL of the molecular sieve MCM-41-NH2 prepared in step (1), and the mixture was dissolved in 30 mL of anhydrous ethanol. A 0.09 mol / L ascorbic acid solution was gradually added dropwise. The mixture was sealed and stirred at 70°C for 60 min in a dark place. A 0.09 mol / L sodium citrate solution was then added dropwise. The resulting mixed solution was filtered and washed with ethanol and water for 15 times, respectively, to obtain a modified molecular sieve Ag / MCM-41-NH2 loaded with AgNPs. Step (3) Preparation of nanocomposite materials First, 70 mL of water, 7 g of OP-10 (dodecylphenol polyoxyethylene ether) and 8 g of SDS (sodium dodecyl sulfate) were added to a three-necked flask, and then 26 g of the modified molecular sieve Ag / MCM-41-NH2 in step (2) was added, the temperature was raised to 120° C., emulsified for 70 min, and reacted for 9 h to obtain a seed emulsion, and then 40 g of a shell monomer mixture (including 20 g of KH570) was added to the seed emulsion and reacted for 11 h. After the reaction was completed, the mixture was allowed to cool to room temperature to obtain a silicon-containing acrylic emulsion, and MCZ (mixed copper-zinc oxide) was mixed with the acrylic emulsion in a ratio of 7:8, and the mixed solution was stirred evenly with a magnetic stirrer for 15 min at a speed of 1000 r / min and ultrasonically dispersed for 20 min to obtain a nanocomposite material; Step (4) Preparation of liquid antibacterial agent containing nanosilver 8 g of the nanocomposite material prepared in step (3) was added to 120 mL of the ionic liquid, and then 0.05 g of PVP (polyvinyl pyrrolidone) was added and stirred for 50 min to obtain an antibacterial liquid containing nanosilver. The aluminum spray prepared in advance was then placed in an automated filling device, which was used for filling and sealing to finally obtain a liquid antibacterial agent containing nanosilver.

[0030] Comparison of detection experiments: The liquid antibacterial agents containing nanosilver obtained in Examples 1 to 4 and Comparative Example Products 1 and 2 were tested. The specific testing method is as follows: Antimicrobial Testing Method The antibacterial rate test method is used to evaluate the antibacterial properties and antibacterial durability of the prepared liquid antifungal and antimicrobial agent. A high initial antibacterial rate indicates that the antibacterial agent has a strong ability to kill bacteria, and it also indicates that the antibacterial agent can take effect quickly and can quickly kill bacteria at the first contact.

[0031] This time, Staphylococcus aureus, a commonly used microorganism, was used for the test. If the initial antibacterial rate of the test is high, it means that the prepared antibacterial agent has a strong antibacterial effect and a long antibacterial durability. If the initial antibacterial rate of the test is low, the antibacterial effect and antibacterial resistance are poor.

[0032] Mold Growth Inhibition Test (MIC) The mold growth inhibition test method is a method for evaluating the mold inhibition effect of liquid antifungal agents, where the MIC value refers to the minimum drug concentration that can inhibit mold growth. A round leather piece that has been treated with mold prevention is placed in a bacterial plate, and then the liquid antifungal agent is sprayed on the bacterial plate. After 14 days of cultivation and observation, the MIC value is measured to obtain the mold growth situation. If the MIC value is small, the mold occupies a small area of ​​the bacterial plate and the mold grows a small amount, indicating that the prepared liquid antifungal agent has a strong antifungal effect. If the MIC value is large, the opposite is true.

[0033] Inhibition zone test The inhibition zone test is a method used to evaluate the inhibitory effect of antimicrobial substances on microbial growth. It uses the diffusion of antimicrobial substances in the culture medium to inhibit the growth of surrounding microorganisms. The size of the inhibition zone reflects the antibacterial strength of the antimicrobial substance. The larger the inhibition zone, the stronger the antibacterial effect of the antimicrobial substance. If the inhibition zone is smaller, the opposite is true.

[0034] Table 1 Antimicrobial test method

[0035] As can be seen from Table 1, Example 1 is the best, while Comparative Example 2 is relatively poor. In Example 1, its initial antibacterial rate is the highest, indicating that the prepared liquid mildew and antibacterial agent has a strong ability to kill bacteria, and can take effect quickly, and can quickly kill bacteria at the first contact, because the nanoparticles themselves have extremely strong antibacterial properties, can effectively kill a variety of bacteria and fungi, and then achieve sustained release by loading on the molecular sieve, which further improves the antibacterial effect. The liquid mildew and antibacterial agent prepared by Comparative Example 2 lacks the high-efficiency antibacterial benefit in the microcapsule mildew-proof material, resulting in the liquid mildew and antibacterial agent prepared by Comparative Example 2. The initial antibacterial rate is not high and the effect is not good.

[0036] Table 2 Fungal Growth Inhibition Test (MIC)

[0037] As can be seen from Table 2, Example 1 is the best, and Comparative Example 2 is poor. In Example 1, the MIC value is 25%, and the area of ​​mold growth accounts for a small area of ​​the bacterial plate, indicating that the liquid mildew-proof and antibacterial agent prepared by the method has a strong mildew-proof effect, and the liquid mildew-proof and antibacterial agent can inhibit the growth of mildew at a lower concentration. Nanosilver effectively inhibits the growth and reproduction of mildew, so that the mildew-proof component can more effectively inhibit the growth of mildew. In Comparative Example 2, the MIC value is 65%, indicating that the area of ​​mildew growth accounts for a large area of ​​the bacterial plate, and the mildew-proof effect is not good.

[0038] Table 3 Inhibition zone test method

[0039] As shown in Table 3, Example 1 is the best and Comparative Example 2 is poor. In Example 1, the diameter of the inhibition zone is 18 mm, which indicates that in Example 1, the liquid mildew and antibacterial agent can form a larger inhibition zone. The larger inhibition zone diameter reflects that the liquid mildew and antibacterial agent can effectively inhibit the growth of surrounding microorganisms, indicating that the liquid mildew and antibacterial agent has a strong antibacterial effect. The diameter of the inhibition zone of Comparative Example 2 is 8 mm, indicating that it cannot well inhibit the growth of microorganisms such as bacteria, and therefore has a poor antibacterial effect.

[0040] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art can make non-creative modifications to the present embodiment as needed, but they are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A preparation process of a novel liquid mildew and antibacterial agent, characterized in that: include: Preparation of ionic liquids, preparation of microcapsule anti-mildew materials, preparation of molecular sieve MCM-41-NH2, preparation of modified molecular sieve Ag / MCM-41-NH2, preparation of nanocomposite materials, preparation of liquid antibacterial agents containing nanosilver.

2. The preparation process of a novel liquid mildew and antibacterial agent according to claim 1, characterized in that: Step (1) Preparation of ionic liquid Add an appropriate amount of trilaurylamine and an appropriate amount of hexadecane bromide into a three-necked flask, add a certain amount of acetonitrile as a solvent, stir under N2 protection, remove the solvent by vacuum distillation, add ethanol to dissolve it, then add an appropriate amount of sodium bis(2-ethylhexyl) phosphate, and after the reaction, vacuum distillation, add n-hexane to the residue, let it stand for a period of time, filter, and collect the filtrate to obtain an ionic liquid; Step (2) Preparation of microcapsule anti-mold material Weigh an appropriate amount of gelatin and an appropriate amount of gum arabic, soak and swell them with an appropriate amount of the ionic liquid in step (1), heat and dissolve them, weigh an appropriate amount of isothiazolinone (OIT, BBIT, BIT), use an emulsifier to make a mixed emulsion, mix the mixed emulsion, gelatin solution and gum arabic solution and add them to a three-necked flask, stir, continue stirring, add warm water, add glutaraldehyde to solidify, continue stirring, let stand overnight, centrifuge the obtained microcapsule suspension for a period of time, wash the precipitate with isopropanol, then wash with anhydrous ethanol, and vacuum dry to obtain a microcapsule anti-mildew material; Step (3) Preparation of molecular sieve MCM-41-NH2 Dissolve MCM-41 (ordered mesoporous silica material) in anhydrous ethanol, add APTES (3-aminopropyltriethoxysilane) dropwise, and add the microcapsule mildew-proof material in step (2) at the same time, stir and reflux, filter the resulting mixed solution and wash it with ethanol and water respectively to remove excess APTES (3-aminopropyltriethoxysilane), thereby obtaining a surface amino-modified molecular sieve MCM-41-NH2; Step (4) Preparation of modified molecular sieve Ag / MCM-41-NH2 Adding nanosilver (Ag) to the molecular sieve MCM-41-NH2 of step (3), and dissolving them together in anhydrous ethanol, then gradually adding ascorbic acid solution dropwise, sealing and stirring in a light-proof manner, then adding an appropriate amount of sodium citrate solution dropwise, filtering the resulting mixed solution, and washing with ethanol and water respectively, to obtain a modified molecular sieve Ag / MCM-41-NH2 loaded with AgNPs; Step (5) Preparation of nanocomposite materials First, water, OP-10 (dodecylphenol polyoxyethylene ether) and SDS (sodium dodecyl sulfate) are added to a three-necked flask, and then the modified molecular sieve Ag / MCM-41-NH2 of step (4) is added, the temperature is raised, emulsified for a period of time, and reacted to obtain a seed emulsion, and then a shell monomer mixture (including KH570) is added to the seed emulsion for reaction. After the reaction is completed, it is left to cool to room temperature to obtain a silicon-containing acrylic emulsion, MCZ (mixed copper-zinc oxide) is mixed with the acrylic emulsion in a certain proportion, the mixed solution is stirred evenly with a magnetic stirrer, and ultrasonically dispersed for a period of time to obtain a nanocomposite material; Step (6) Preparation of liquid antibacterial agent containing nanosilver Take an appropriate amount of the nanocomposite material of step (5) and add it to the ionic liquid, then add PVP (polyvinyl pyrrolidone), stir and mix evenly to obtain an antibacterial liquid containing nanosilver, then put the pre-prepared aluminum spray into an automated filling device, fill and seal the device, and finally obtain a liquid antibacterial agent containing nanosilver.

3. The preparation process of a novel liquid mildew and antibacterial agent according to claim 2, characterized in that: Step (1) Preparation of ionic liquid 0.1-0.5 mol of trilaurylamine and 0.1-0.5 mol of hexadecane bromide are added into a three-necked flask, and 150-200 mL of acetonitrile is added as a solvent. Under the protection of N2, the reaction is stirred for 70-80 hours, and the solvent is removed by vacuum distillation. Then, 10-20 g of ethanol is added to dissolve it, and then 0.1-0.5 mol of sodium bis(2-ethylhexyl) phosphate is added. After reacting for 24-48 hours, vacuum distillation is performed. n-hexane is added to the residue, and the mixture is allowed to stand for 12-24 hours, and then filtered. The filtrate is collected to obtain an ionic liquid.

4. The preparation process of a novel liquid mildew and antibacterial agent according to claim 3, characterized in that: Step (2) Preparation of microcapsule anti-mold material Weigh 10-20 g of gelatin and 15-20 g of gum arabic, soak and swell 10-20 mL of the ionic liquid of step (1), heat and dissolve, weigh 10-20 g of isothiazolinone (OIT, BBIT, BIT), use an emulsifier to make a mixed emulsion, mix the mixed emulsion, gelatin solution and gum arabic solution and add them to a three-necked flask, stir for 1-5 h to adjust the pH value to 3-5, continue stirring for 30-60 min, add 20-50 mL of 50-100 ° C warm water, add 25-50% glutaraldehyde to solidify for 30-60 min, adjust the pH value to 10-20, continue stirring for 20-40 min, stand overnight, centrifuge the obtained microcapsule suspension for 30-60 min, wash the precipitate with isopropanol 1-5 times, wash with anhydrous ethanol 2-6 times, and vacuum dry to obtain a microcapsule mildew-proof material.

5. The preparation process of a novel liquid mildew and antibacterial agent according to claim 4, characterized in that: Step (3) Preparation of molecular sieve MCM-41-NH2 Dissolve 3-10g MCM-41 (ordered mesoporous silica material) in 10-20mL anhydrous ethanol, add 10-20mL APTES (3-aminopropyltriethoxysilane) dropwise, and add 10-20g of the microcapsule mildew-proof material in step (2) at the same time, stir and reflux for 12-24h, filter the obtained mixed solution and wash it with ethanol and water for 3-10 times respectively to remove excess APTES (3-aminopropyltriethoxysilane), thereby obtaining the surface amino-modified molecular sieve MCM-41-NH2.

6. The preparation process of a novel liquid mildew and antibacterial agent according to claim 5, characterized in that: Step (4) Preparation of modified molecular sieve Ag / MCM-41-NH2 10-20 g of nanosilver (Ag) is added to 10-20 mL of the molecular sieve MCM-41-NH2 of step (3), and the mixture is dissolved in 15-30 mL of anhydrous ethanol. An appropriate amount of 0.01-0.05 mol / L ascorbic acid solution is then gradually added dropwise. The mixture is sealed and stirred at 40-60° C. in a dark place for 30-60 min. Then, 0.05-0.1 mol / L sodium citrate solution is added dropwise. The resulting mixed solution is filtered and washed with ethanol and water for 3-10 times, respectively, to obtain a modified molecular sieve Ag / MCM-41-NH2 loaded with AgNPs.

7. The preparation process of a novel liquid mildew and antibacterial agent according to claim 6, characterized in that: Step (5) Preparation of nanocomposite materials First, 30-60 mL of water, 1.5-5 g of OP-10 (dodecylphenol polyoxyethylene ether) and 0.5-1 g of SDS (sodium dodecyl sulfate) are added to a three-necked flask, and then 10-20 g of the modified molecular sieve Ag / MCM-41-NH2 of step (4) is added, the temperature is raised to 80-100° C., emulsified for 30-60 min, and reacted for 2-6 h to obtain a seed emulsion, and then 10-20 g of a shell monomer mixture (including 5-10 g of KH570) is added to the seed emulsion and reacted for 2-10 h. After the reaction is completed, the mixture is allowed to cool to room temperature to obtain a silicon-containing acrylic emulsion, and MCZ (mixed copper-zinc oxide) is mixed with the acrylic emulsion in a ratio of 1-5:2-5, and the mixed solution is stirred evenly with a magnetic stirrer for 5-10 min at a speed of 500-1000 r / min, and ultrasonically dispersed for 10-20 min to obtain a nanocomposite material.

8. The preparation process of a novel liquid mildew and antibacterial agent according to claim 7, characterized in that: Step (6) Preparation of liquid antibacterial agent containing nanosilver Take 2-5g of the nanocomposite material prepared in step (5) and add it to 50-100mL of ionic liquid, then add 0.01-0.05g of PVP (polyvinyl pyrrolidone) and stir for 20-50min to mix evenly to obtain an antibacterial liquid containing nanosilver. Then put the pre-prepared aluminum spray into an automated filling device, which performs filling and sealing to finally obtain a liquid antibacterial agent containing nanosilver.

Images