Systemic active antibacterial cellulose composite fiber and preparation method thereof

Abstract

The invention discloses a systemic active antibacterial cellulose composite fiber and a preparation method thereof. The cellulose-based silver / graphene oxide / zinc oxide composite fiber uses porous cellulose as a support, nanometer zinc oxide and graphene oxide are distributed in the cellulose matrix, and nano-silver coats the surface of the nanometer zinc oxide. The preparation method comprises: skillfully dissolving zinc oxide into cellulose in one step through biomineralization, adding graphene oxide into the cellulose, preparing a cellulose-based graphene oxide / zinc oxide solution through the reducibility of cellulose / zinc oxide, preparing fibers through a wet spinning technique, dipping the fibers into a certain concentration of a silver nitrate solution, and carrying out irradiation through a fluorescent lamp so that the nano-silver coats the fibers and the cellulose silver / graphene oxide / zinc oxide composite fiber is formed. The preparation method is simple and environmentally friendly. The composite fiber has excellent antibacterial properties.

Description

technical field [0001] The invention relates to a systemic active antibacterial cellulose composite fiber and a preparation method thereof, belonging to the field of composite materials. Background technique [0002] Cellulose is the most abundant renewable resource in nature and plays an important role in the development of environmentally friendly, biocompatible and functional materials. Due to its unique reaction function and molecular characteristics, it is expected to become the main chemical raw material in the future. However, poor functionality has become a bottleneck in the development of cellulose materials, and the combination of cellulose and functional nanoparticles has been proved to be an important means of cellulose modification. However, due to the limitation that cellulose is difficult to dissolve in general solvents, the current methods for preparing cellulose-based nanocomposites include: 1) mechanical blending, such as Alejandro using mixing-rolling equi...

AI Technical Summary

Problems solved by technology

However, the preparation of cellulose / zinc oxide composites by the direct blending method has high requirements for equipment, which is not conducive to large-scale production; 2) chemical method, which mainly involves immersing the cellulose matrix in the precursor solution of inorganic nanoparticles Soaking, and then obtained by sol-gel, mainly including hydrothermal method and solvothermal method, both of which require higher reaction temperature (90-150°C) and longer reaction time (3-20h); 3) The electrospinning method is to prepare cellulose derivatives with significantly improved solubility properties by derivatizing and modifying cellulose, and then dissolve them in organic solvents together with inorganic nanoparticle precursors for electrospinning. The electrospun nanomaterials undergo The cellulose-based inorganic nanoparticle composite material was finally prepared by washing with water and high temperature treatment. However, the mechanical properties of the composite material prepared by electrospinning method need to be improved.

In addition, the inorganic nanoparticles in the cellulose-based inorganic nanoparticle composite film prepared by the above method are mainly distributed on the outside of the cellulose matrix, and when used as an antibacterial material, the antibacterial time is short

[0003] The problem to be solved by the present invention: Although cellulose is rich in reserves and low in price, it has a single function, and the introduction of inorganic nanoparticles can solve this problem

However, the reported preparation methods of cellulose-based inorganic nanoparticle composite materials are too complicated and cumbersome, and most of the nanoparticles are dispersed on the surface of the fiber matrix material, and it is easy to cause them to agglomerate.