A kind of preparation method of nano silver/cellulose composite antibacterial material

Abstract

The invention discloses a preparation method of a nano-silver / cellulose composite antibacterial material, which comprises the following steps: step 1, dissolving cellulose in a mixed solution of sodium hydroxide and urea to prepare a cellulose solution; step 2, preparing a cellulose solution to step 1 Add silver nitrate solution to the obtained cellulose solution, stir it evenly and quickly put it into the microwave reactor; step 3, set the temperature of the microwave reactor to 40-80°C, and the time is 20-60min; step 4, obtain the The nano-silver / cellulose composite is washed with hot water until the washing liquid is neutral to obtain the nano-silver / cellulose composite. The present invention reduces silver ions to silver nanoparticles through the oxidation reaction of hydroxyl groups on the surface of cellulose to obtain nano-silver / cellulose composite materials without adding additional reducing agents to avoid environmental pollution; high efficiency and energy saving, excellent antibacterial performance, simple process, and low cost of raw materials The cost is low, the reaction time is short, and it is convenient for industrial promotion.

Description

technical field [0001] The invention relates to a preparation method of an antibacterial material, in particular to a preparation method of a nano silver / cellulose composite antibacterial material. Background technique [0002] Silver nanoparticles play a leading role in the preparation and research of antibacterial materials at present. Compared with organic antibacterial agents and natural antibacterial agents, silver nanoparticles have the advantages of high antibacterial activity, heat resistance, durability and safety. Silver nanoparticles have excellent inhibitory properties against various microorganisms, and at the same time, they will not be metabolized by bacteria, nor will they cause microorganisms to develop drug resistance, so they show a sustained antibacterial effect. However, due to the self-aggregation of silver nanoparticles, the specific surface area will be reduced, and the probability of contact between silver nanoparticles and the surface of microorgani...

AI Technical Summary

Problems solved by technology

[0007] In general, there are problems such as toxic and high cost of external reducing agent, high cost of raw materials, long reaction time, complicated preparation steps, self-aggregation of nano-silver will reduce antibacterial performance, etc.

Therefore, it is a great challenge to synthesize nanosilver-cellulose composites with excellent antibacterial properties in a green, efficient and low-cost method.

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