Preparation method of nano silver bactericide used for recirculated cooling water
A technology of circulating cooling water and nano-silver, applied in botany equipment and methods, chemicals for biological control, biocides, etc., can solve problems such as easy agglomeration, uneven dispersion of nano-silver, and insufficient stability of nano-silver , to achieve the effect of strong antibacterial effect and high killing efficiency
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[0023] Example 1 Preparation of Nano Silver Fungicide
[0024] The preparation method of nano silver bactericide includes the following steps:
[0025] (1) Preparation of immobilized carrier: add 2.5g of chitosan to 100ml of 2% acetic acid solution with v / v of 100ml, stir well to prepare a solution of chitosan with v / v of 2.5%, add 8g of sodium hydroxide to 200ml of v / v is 60% ethyl acetate solution, fully dissolve it, prepare a v / v of 4% sodium hydroxide-ethyl acetate solution, use a medical disposable 5ml syringe with a needle type of 27G to suck 3ml of shell polymer The sugar solution, the chitosan solution is titrated into the sodium hydroxide-ethyl acetate solution through a syringe needle, that is, the chitosan ball is made as an immobilized carrier, and then repeatedly washed with deionized water until no sodium hydroxide remains. Store at 4℃ for later use;
[0026] (2) Cross-linking activated immobilized carrier: select 2g of immobilized carrier chitosan balls, add 50ml of ...
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