A preparation method of anti-mosquito and antibacterial nano-silver solution with highly uniform particle size

Abstract

The invention relates to a method for preparing an anti-mosquito and antibacterial nano-silver solution with a highly uniform particle size, comprising the following steps: S1. β-cyclodextrin-polyglycine aqueous solution with a mass percentage of 5% to 20%, wherein the mass percentage is a mass percentage The anti-mosquito small molecules of 1% to 6% and the silver ion solution with a mass fraction of 0.3 to 300g / L are fully stirred and mixed at a volume ratio of 1:1:1; S2. Continuously add the mass percentage in the above mixed solution 10ml of an aqueous solution of 5%-60% reducing agent; S3. Heating the mixed solution to 10-120 degrees Celsius in a water bath and continuously stirring for 5-80min to obtain a nano-silver colloidal solution. In this application, β-cyclodextrin-polyglycine is easily soluble in water, neutral and stable, does not harm the skin, has good permeability, and has a certain antibacterial effect; its β-cyclodextrin can embed various oil-soluble mosquito repellent small molecules , can achieve long-term mosquito repellent effect, low cost, simple process, good stability, small nano-silver particle size, high antibacterial efficiency and good mosquito repellent effect.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a method for preparing an anti-mosquito and antibacterial nano-silver solution with highly uniform particle diameters. Background technique [0002] Nanoparticles, also known as ultrafine particles, refer to nanoparticles with a particle size between 1 and 100 and formed by agglomeration of several to dozens of atoms. Nanoparticles have many special properties different from conventional solids, such as small size effect, surface effect and macroscopic quantum tunneling effect. Studies in recent years have shown that nano-silver particles have a strong inhibitory and killing effect on 12 Gram-negative bacteria, 8 Gram-positive bacteria and 6 molds. Therefore, it has broad application prospects in the fields of functional textiles and medical care. [0003] The preparation methods of existing nano-silver mainly include physical method and chemical method. The physical met...

AI Technical Summary

Problems solved by technology

However, the selected polymer structure often has defects, resulting in uneven nano-silver particle size, poor stability, and easy oxidation.

Therefore, it is difficult to develop

In addition, the developed nano-silver only has antibacterial function, which is helpless for some functional textiles that require composite functions.

For example, turbans and mosquito nets in the Middle East need antibacterial and anti-mosquito functions, which cannot be achieved by a single nano-silver solution

[0004] The preparation method of existing nano-silver colloidal solution often adopts toxic protective agent or some highly reactive chemical raw materials, and the prepared nano-silver colloidal solution has potential toxicity, irritation, and the prepared nano-silver has defects such as single function. Carry out technical innovation on the basis of existing technology

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