Alginic acid/nano-silver composite nanofiber and preparation method thereof

Abstract

The invention discloses an alginic acid/nano-silver composite nanofiber. The alginic acid/nano-silver composite nanofiber is acquired in the manner of preparing a silver alginate nanofiber after the ion exchange of a sodium alginate nanofiber acquired through an electrostatic spinning process and then reducing silver ions. Nano-silver grains are uniformly distributed on the inner and outer surfaces of the alginic acid/nano-silver composite nanofiber. A method for preparing the material successfully overcomes the limitation of the spinning property to the doping content of nano-silver grains and solves the problem of nano-silver grain conglobation in the electrostatic spinning process. The method can realize the large-scale production of the nano-silver containing composite fiber; the composite nanofiber is high in nano-silver grain content; the nano-silver grains are uniformly distributed on the material surface; and the fiber diameter is small, the specific surface area is large, the performance is excellent, the fiber is easy to be recycled and the cost is effectively saved.

Description

Technical field [0001] The invention belongs to the technical field of nano materials, and specifically relates to an alginic acid / nano silver composite nanofiber and a preparation method thereof. Background technique [0002] Composite materials prepared by combining functional nanoparticles and electrospinning have attracted widespread attention due to their unique magnetic, optical, electrical, and catalytic properties. Among the many functional properties of nanoparticles, gold, silver, and platinum nanoparticles have unique electrical, optical and catalytic properties. Taking nano-silver particles as an example, nano-silver has a strong inhibitory and killing effect on dozens of pathogenic microorganisms such as Escherichia coli, Neisseria gonorrhoeae and Chlamydia trachomatis, and it will not produce drug resistance. The surface effect of nano-silver particles, The quantum size effect, etc., make it also have some special applications, such as surface enhanced Raman applic...

AI Technical Summary

Problems solved by technology

However, this method has many shortcomings

In the direct blending process, the doping amount of silver nanoparticles is seriously restricted by the spinnability; and the nanoparticles are easy to agglomerate, and it is difficult to obtain a uniform spinning precursor solution, resulting in uneven distribution of silver nanoparticles in the material, and the prepared nano The fiber diameter is not uniform, which affects the performance of the material

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