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Preparation method of nano-silver antibacterial agent, nano-silver antibacterial agent, antibacterial plastics and preparation method of antibacterial plastics

An antibacterial plastic and antibacterial agent technology, applied in the field of antibacterial plastics, antibacterial agents and antibacterial plastics, can solve the problems of difficulty in crushing, poor plastic transparency, waste, etc. Effect

Active Publication Date: 2019-01-18
宝鸡霍夫纳米复合材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a big problem in the pulverization of the antibacterial composition prepared by this method. Some polymer materials are relatively soft at room temperature, and it is difficult to pulverize. A large amount of inorganic powder fillers or low-temperature freezing are required. This process causes a lot of waste and expense. The transparent effect of plastic is poor, so it is not suitable for the preparation of plastics that require high transparency
[0008] According to the existing technology, it can be found that there is a lack of a colorless, non-aqueous nano-silver antibacterial agent that can be safely applied to daily plastic products in the market

Method used

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preparation example Construction

[0050] The principle of the preparation method of the present invention is to adopt the method of chemical reduction, specifically refers to the liquid phase chemical reduction method, the liquid phase here is a low-chain organic solvent containing hydroxyl without water, specifically refers to ethanol, glycerol, iso At least two of propanol, tyrosine methyl ester, serine, and ethylene glycol are mixed at a molar ratio of 1:1. In the third mixed solution, the silver salt is Ag + The hydroxyl group of a very small amount of solvent in the mixed solution can form a complex with silver ions, and the oxygen in the solvent or air will also participate in the reaction, forming a very small amount of Ag 2 O, the mixed solution is mainly composed of silver ions, and the system is extremely unstable, and the solution is light yellow. Under the condition of 80~120℃, penetrant and protective agent reduce the Ag in the solution + , form nano-Ag0, after cooling, form a stable silver-cont...

Embodiment 1

[0056] Preparation of nano silver antibacterial agent a

[0057] Dissolve 0.1% of phenyl o-hydroxybenzoate and 0.5% of sulfated castor oil in a mixed solution of 80% ethylene glycol and isopropanol with a molar ratio of 1:1. Mix at a speed of 30-80 rpm for 5-70 minutes, seal and let stand for 10-50 minutes to obtain the first mixed solution;

[0058] Dissolving 1% silver sulfate with 18.3% solvent, mixing at a speed of 30-80 rpm for 5-30 minutes to obtain a second mixed solution;

[0059] Slowly pour the second mixed solution into the first mixed solution, mix evenly, then add 0.1% ammonium persulfate, continue to mix until the initiator is completely dissolved, let it stand for 5 to 20 minutes, the third mixed solution;

[0060] Put the third mixed solution in an oil bath at 80-120°C, stir and mix evenly in the open, and stir at a stirring speed of 5-20 rpm for 5-45 minutes, the ambient temperature is 20-30°C, and the humidity is 40-70%. Obtain a transparent slightly yellow...

Embodiment 2

[0070] Preparation of nano silver antibacterial agent b

[0071] Dissolve 0.2% citric acid and 1% sodium alkylbenzene sulfonate in a mixed solution of 65% ethanol and tyrosine methyl ester with a molar ratio of 1:1. Mix at a speed of 30-80 rpm for 5-70 minutes, seal and let stand for 10-50 minutes to obtain the first mixed solution;

[0072] Dissolving 0.5% silver fluoride with 33.2% solvent, mixing at a speed of 30-80 rpm for 5-30 minutes to obtain a second mixed solution;

[0073] Slowly pour the second mixed solution into the first mixed solution, mix evenly, then add 0.1% ammonium persulfate, continue to mix until the initiator is completely dissolved, and let it stand for 5 to 20 minutes to obtain the third mixed solution ;

[0074] Put the third mixed solution in an oil bath at 80-120°C, stir and mix evenly in the open, and stir at a stirring speed of 5-20 rpm for 5-45 minutes, the ambient temperature is 20-30°C, and the humidity is 40-70%. Obtain a transparent slight...

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Abstract

The invention discloses a preparation method of a nano-silver antibacterial agent, the nano-silver antibacterial agent, antibacterial plastics and a preparation method of the antibacterial plastics. The preparation method of the nano-silver antibacterial agent comprises the following steps: adopting a liquid-phase chemical reduction method, wherein the liquid phase is a hydroxyl-containing water-free organic solvent, and a protective agent and a penetrating agent can serve as reactive reduction agents; reducing Ag<+> into nano Ag particles at a certain temperature, and finally forming a stablesolution of a silver-containing complex with the protective agent, the penetrating agent and the solvent under a certain conditions, thereby obtaining the stable, colorless, transparent and water-free nano-silver antibacterial solution. The nano-silver antibacterial agent prepared by the method achieves an excellent antibacterial effect when applied to the antibacterial plastics.

Description

technical field [0001] The present invention relates to the fields of antibacterial agents and antibacterial plastics, more specifically to a method for preparing a nano-silver antibacterial agent, to a nano-silver antibacterial agent, to an antibacterial plastic, and to a preparation method for an antibacterial plastic. Background technique [0002] Plastic products are inseparable from our daily life and involve every aspect of our life. With the improvement of the quality of life and people's emphasis on health, antibacterial plastic products appear in our field of vision and quickly occupy the plastic product market, especially the daily-use plastic products that we contact and use frequently, such as antibacterial toothbrushes, antibacterial plastic cutting boards , antibacterial slippers, baby pacifiers and high-end interior paint. People have higher requirements for these intimate daily-use plastic products, which must be non-toxic and antibacterial, but also beautif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L91/00C08K9/04C08K5/00C08L23/08
CPCC08K5/0091C08K9/04C08L23/0853C08L91/00
Inventor 杜一挺
Owner 宝鸡霍夫纳米复合材料研究院有限公司
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