Nanometer silver-nanocrystalline cellulose compound, preparation method of nanometer silver-nanocrystalline cellulose compound, and application of nanometer silver-nanocrystalline cellulose compound

Abstract

The invention belongs to the technical field of nanometer materials, and discloses a preparation method of the nanometer silver-nanocrystalline cellulose compound. The preparation method includes the following steps of adding a nanometer silver-nanocrystalline cellulose aqueous solution to a silver salt aqueous solution under the stirring condition, conducting stirring to obtain mixed liquor, stirring the mixed liquor in an ultrasonic container, conducting an ultrasonic reaction, conducting centrifugal separation on the reaction liquor after the reaction is completed, and taking and washing sediments to obtain the nanometer silver-nanocrystalline cellulose compound. The nanometer silver-nanocrystalline cellulose compound obtained through the method can serve as an antibacterial material to be applied to the field of articles of daily use, the medical treatment and public health field, the building material coating field and the electronic product field. The sizes of nanometer silver particles in the nanometer silver-nanocrystalline cellulose compound are the same. Dispersity of the nanometer silver particles in the nanometer silver-nanocrystalline cellulose compound is good. Nanometer silver is evenly loaded on the nanometer silver-nanocrystalline cellulose and not prone to agglomeration. The nanometer silver-nanocrystalline cellulose compound has good solubility in water.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a nano silver-nano microcrystalline cellulose composite and a preparation method and application thereof. Background technique [0002] At present, antibacterial materials mainly include natural antibacterial materials and organic synthetic antibacterial materials. Generally speaking, natural antibacterial materials have the advantages of high safety, but their general lifespan is short, heat resistance is poor, and it is not easy to be reprocessed; organic synthetic antibacterial materials have the advantages of wide antibacterial range and fast sterilization speed, but their thermal stability is relatively low. Poor, easy to decompose, poor persistence, usually highly toxic, and harmful to the human body if used for a long time; in order to overcome the shortcomings of natural antibacterial materials and organic synthetic antibacterial materials, people gradua...

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Problems solved by technology

[0004] The Chinese invention patent "Preparation Method of Bacterial Cellulose-Nano-Silver Composite Material" with the application number of 201010139916.7 discloses a preparation method of bacterial cellulose-nano-silver composite material using a non-toxic reducing agent. Alcohol is used as a stabilizer, which avoids the toxicity problem caused by other reagents, but the method steps are more complicated, more reagents are introduced, and the cost is higher

The Chinese invention patent application with the application number 201310318590.8 "A Green Synthesis Method of Cellulose Nano-Silver Particles" discloses a hydrothermal reaction system that combines the hydrolysis of lignocellulose with the reduction process of nano-silver particles. The technology of preparing nano-silver particles by reducing the hydrolyzed product of glucose to prepare nano-silver particles. This preparation method does not need to introduce other chemical reagents, which is convenient to operate, but the reaction time is long, and the size of the prepared nano-silver particles is large, and the dispersion is not uniform enough.

The Chinese invention patent application "A Cellulose / Silver / Silver Chloride Composite Material and Its Preparation Method" with the application number 201310081261.6 discloses ultrasonic treatment of a mixture of cellulose solution, silver salt and chlorine-containing compound to prepare a fiber The method of plain / silver / silver chloride composite material, the particle size of silver / silver chloride nanoparticles in the product obtained by the method is uniform, uniformly dispersed on the cellulose substrate, but this method needs to disperse the cellulose in sodium hydroxide / urea In the aqueous solution, an alkaline environment is provided for the redox reaction of silver / silver chloride, and other reagents are introduced, which increases the cost

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