Preparation of functionalized bacterial cellulose compound sol and composite material modified by light conversion antibacterial particles

Abstract

The invention relates to a phototransformation antibacterial particle-modified functional bacterial cellulose compound sol and a preparation method of the composite material. The method comprises the steps of: S1, distribution and activation of inorganic particles; S2, pre-treatment of the bacterial cellulose; S3, preparation of bacterial cellulose nanocrystals; S4, chemical modification of the bacterial cellulose; S5, preparation of the phototransformation antibacterial particle-modified functional bacterial cellulose compound sol; and further preparing different antibacterial composite materials by using the compound sol. The prepared phototransformation antibacterial particle-modified functional bacterial cellulose compound sol has very good stability, and activated inorganic antibacterial particles can form a stable chemical bond effect with modified bacterial cellulose under a certain condition, so that the antibacterial particles are free of agglomeration and are uniformly and stably distributed in the whole system with bacterial cellulose as a matrix material of a product, thereby providing excellent operability for a subsequent application.

Description

technical field [0001] The invention relates to the preparation of a functionalized bacterial cellulose compound sol and a composite material modified by photoconversion antibacterial particles, in particular to the dispersion and activation of photocatalytic materials and the preparation technology of bacterial cellulose and the preparation of antibacterial compound sol and antibacterial composite material preparation. Background technique [0002] With the improvement of people's living standards, people have higher and higher requirements for hygiene quality in life, and a large number of antibacterial products have been paid more and more attention. Such as antibacterial plastics, antibacterial ceramics, antibacterial coatings, antibacterial fabrics, and antibacterial paper. [0003] However, traditional antibacterial products, such as antibacterial paper and antibacterial film, just introduce antibacterial agents into ordinary paper or film materials to make so-called ...

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Problems solved by technology

[0003] However, traditional antibacterial products, such as antibacterial paper and antibacterial film, just introduce antibacterial agents into ordinary paper or film materials to make so-called antibacterial paper or antibacterial films, and most of the antibacterial agents are metals that can kill bacteria. And organic substances, such as silver, nickel, etc., these antibacterial agents have a certain antibacterial effect at the beginning of use, but with the consumption of these antibacterial agents, the antibacterial properties of the material will also disappear, because the antibacterial agent is successfully prepared in the material post-added, so the dispersion of antibacterial agents cannot achieve ideal uniform dispersion, and the antibacterial properties of these antibacterial materials are not controllable; titanium dioxide has photoresponsiveness, and can generate free radicals under light irradiation of a certain wavelength, free radicals can Kill or inhibit the growth of bacteria, among which the titanium dioxide composite antibacterial agent has better antibacterial properties under specific conditions, its antibacterial effect is more efficient and sustainable than traditional antibacterial agents, and can achieve controllable antibacterial

[0004] Cellulose is a kind of purified, partially depolymerized cellulose, which has high reactivity in the process of carboxymethylation, acetylation, and esterification, and is widely used in medicine, food, cosmetics, and light chemical industries. Mainly prepared from plant fibers, but current extraction technology consumes a lot of acid, energy consumption is better, and the fiber size is not uniform

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