Preparation method of nano silver antibacterial agent, nano silver antibacterial agent, antibacterial plastic and preparation method of antibacterial plastic

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 invention relates to the field of antibacterial agents and antibacterial plastics, more particularly to a preparation method of a nano silver antibacterial agent, also relates to a nano silver antibacterial agent, also relates to antibacterial plastics, and also relates to a preparation method of antibacterial plastics. Background technique

[0002] Plastic products are inseparable from our daily life and involve all aspects of our lives. With the improvement of life quality and people's attention to health, antibacterial plastic products have appeared in our field of vision, and quickly occupy the plastic product market, especially the daily plastic products that we touch 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 plastic products, which are not only non-toxic and antibact...

Examples

preparation example Construction

[0050] The principle on which the preparation method of the present invention is based is to adopt a chemical reduction method, specifically a liquid-phase chemical reduction method, where the liquid phase is a low-chain organic solvent containing no water and a hydroxyl group, specifically ethanol, glycerol, isotope At least two of propanol, tyrosine methyl ester, serine and ethylene glycol are mixed in a molar ratio of 1:1. In the third mixed solution, the silver salt is represented by Ag + In the mixed solution, the hydroxyl group of a very small amount of solvent can form a complex with silver ions, and the oxygen in the solvent or the air will also participate in the reaction, forming a very small amount of Ag 2 O, this mixed solution is mainly composed of silver ions, and the system is extremely unstable, and the solution is pale yellow. Under the condition of 80~120℃, penetrant and protective agent reduce Ag in solution + , form nano-Ag0, after cooling, form a stable ...

Embodiment 1

[0056] Preparation of Nano Silver Antibacterial Agent a

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

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

[0059] Pour the second mixed solution into the first mixed solution at a slow speed, mix at a uniform speed, then add 0.1% ammonium persulfate, continue mixing until the initiator is completely dissolved, stand for 5 to 20 minutes, and the third mixed solution;

[0060] The third mixed solution is carried out in an oil bath at 80-120°C, stirred and evenly mixed with an open mouth, and stirred for 5-45 minutes at a stirring speed of 5-20 r / min. The ambient temperature is 20-30°C, and the humid...

Embodiment 2

[0070] Preparation of Nano Silver Antibacterial Agent b

[0071] Dissolve 0.2% citric acid and 1% sodium alkyl benzene sulfonate in a mixed solution solvent of 65% ethanol and tyrosine methyl ester with a molar ratio of 1:1 at 40°C and a humidity of 40-70%. Mixing at a speed of 30-80 rpm for 5-70 minutes, sealing and standing for 10-50 minutes to obtain a first mixed solution;

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

[0073] Pour the second mixed solution into the first mixed solution at a slow speed, mix at a uniform speed, then add 0.1% ammonium persulfate, continue mixing until the initiator is completely dissolved, and let stand for 5 to 20 minutes to obtain a third mixed solution ;

[0074] The third mixed solution is carried out in an oil bath at 80-120°C, stirred and evenly mixed with an open mouth, and stirred for 5-45 minutes at a stirring speed of 5-20 r / min. T...

technical field

[0001] The invention relates to the field of antibacterial agents and antibacterial plastics, more particularly to a preparation method of a nano silver antibacterial agent, also relates to a nano silver antibacterial agent, also relates to antibacterial plastics, and also relates to a preparation method of antibacterial plastics. Background technique

[0002] Plastic products are inseparable from our daily life and involve all aspects of our lives. With the improvement of life quality and people's attention to health, antibacterial plastic products have appeared in our field of vision, and quickly occupy the plastic product market, especially the daily plastic products that we touch 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 plastic products, which are not only non-toxic and antibact...

Examples

preparation example Construction

[0050] The principle on which the preparation method of the present invention is based is to adopt a chemical reduction method, specifically a liquid-phase chemical reduction method, where the liquid phase is a low-chain organic solvent containing no water and a hydroxyl group, specifically ethanol, glycerol, isotope At least two of propanol, tyrosine methyl ester, serine and ethylene glycol are mixed in a molar ratio of 1:1. In the third mixed solution, the silver salt is represented by Ag + In the mixed solution, the hydroxyl group of a very small amount of solvent can form a complex with silver ions, and the oxygen in the solvent or the air will also participate in the reaction, forming a very small amount of Ag 2 O, this mixed solution is mainly composed of silver ions, and the system is extremely unstable, and the solution is pale yellow. Under the condition of 80~120℃, penetrant and protective agent reduce Ag in solution + , form nano-Ag0, after cooling, form a stable ...

Embodiment 1

[0056] Preparation of Nano Silver Antibacterial Agent a

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

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

[0059] Pour the second mixed solution into the first mixed solution at a slow speed, mix at a uniform speed, then add 0.1% ammonium persulfate, continue mixing until the initiator is completely dissolved, stand for 5 to 20 minutes, and the third mixed solution;

[0060] The third mixed solution is carried out in an oil bath at 80-120°C, stirred and evenly mixed with an open mouth, and stirred for 5-45 minutes at a stirring speed of 5-20 r / min. The ambient temperature is 20-30°C, and the humid...

Embodiment 2

[0070] Preparation of Nano Silver Antibacterial Agent b

[0071] Dissolve 0.2% citric acid and 1% sodium alkyl benzene sulfonate in a mixed solution solvent of 65% ethanol and tyrosine methyl ester with a molar ratio of 1:1 at 40°C and a humidity of 40-70%. Mixing at a speed of 30-80 rpm for 5-70 minutes, sealing and standing for 10-50 minutes to obtain a first mixed solution;

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

[0073] Pour the second mixed solution into the first mixed solution at a slow speed, mix at a uniform speed, then add 0.1% ammonium persulfate, continue mixing until the initiator is completely dissolved, and let stand for 5 to 20 minutes to obtain a third mixed solution ;

[0074] The third mixed solution is carried out in an oil bath at 80-120°C, stirred and evenly mixed with an open mouth, and stirred for 5-45 minutes at a stirring speed of 5-20 r / min. T...

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