Silver nanoparticle-containing bacterial cellulose membrane and preparation method thereof

Abstract

The invention relates to a silver nanoparticle-containing bacterial cellulose membrane and a preparation method thereof. Silver nanoparticles in the bacterial cellulose membrane are attached to the microfiber surface of a three-dimensional network structure of the bacterial cellulose membrane, and the silver nanoparticles are in an amount which is 0.1 to 15 percent of the total weight of the cellulose membrane and have the particle size of between 8 and 50nm. The preparation method comprises the following steps of: soaking the bacterial cellulose membrane in silver salt solution at room temperature for 10 minutes to 5 hours and taking the soaked membrane out; cleaning the surface of the bacterial cellulose membrane by using distilled water; irradiating by an ultraviolet radiation method for 0.5 to 6 hours to obtain a silver nanoparticle-containing bacterial cellulose wet membrane; and performing dehydration treatment to obtain the silver nanoparticle-containing bacterial cellulose membrane. The bacterial cellulose membrane has high bacteria resistance, high air permeability, high water-holding capacity and controllable moisture content and is suitable to be used as a trauma medical dressing; and in the invention, a chemical reduction reagent is not required to be added, an environment-friendly and safe process condition is realized, and equipment is simple and pollution-free.

Description

technical field [0001] The invention belongs to the field of composite materials containing silver nanoparticles, in particular to a bacterial cellulose film containing silver nanoparticles and a preparation method thereof. Background technique [0002] Bacterial cellulose is a high-purity cellulose synthesized by microorganisms, and its microfiber diameter is only 40-60nm, which is the finest nanomaterial in nature. The microfiber network structure makes it have high specific surface area, high water holding capacity, good biocompatibility and biodegradability, and is called "natural biomedical material endowed by nature to human beings". A large number of studies and clinical trials have shown that bacterial cellulose-based wound dressings have good healing effects on burns, scalds and chronic ulcer diseases. For example, the treatment cycle of chronic venous ulcers of lower extremities using wet bacterial cellulose membranes only takes 14 weeks, while the hydrocolloid dr...

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Problems solved by technology

Most of the above studies used NaBH 4 , formaldehyde and other chemical reagents are reducing agents, these reagents usually have high human toxicity, it is difficult to solve the problem of reagent residue in the fiber membrane after the reaction, especially not suitable for the preparation of biomedical material products