Preparation method of nano silver antibacterial agent, nano silver antibacterial agent, antibacterial plastic and preparation method of antibacterial plastic
A technology of antibacterial plastics and antibacterial agents, applied in the fields of antibacterial agents, antibacterial plastics, and antibacterial plastics, can solve the problems of difficult crushing, poor plastic transparency, waste, etc., and achieve easy formula compatibility, lower surface tension, and easy industrialization Effect
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[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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