1. Current status of nano-antibacterial textiles
In the late 1980s, durable antibacterial fibers began to be obtained by blending spinning of chemical fibers and antibacterial agents. These antibacterial agents are all inorganic substances, including metal elements, oxides and various compounds. According to different sterilization mechanisms, they can be divided into contact antibacterial agents and photocatalytic antibacterial agents. Due to the development of nanotechnology in recent years, submicron and nanoscale inorganic antibacterial agents can be mass-produced and blended into chemical fibers, ensuring the industrialization of antibacterial chemical fibers.
Recently, some fiber manufacturers in many countries in the world, especially Japan, the United States, and the United Kingdom, have seen the importance of antibacterial fibers and have developed and produced their own antibacterial fibers and textiles. Among them, antibacterial agents are added to the spinning solution Most of the fibers produced are polyester, acrylic, nylon, etc.
The ultra-fine nano-antibacterial powder developed by the National Super Powder Engineering Center can give resin products antibacterial capabilities and inhibit various bacteria, fungi and molds. The “nano-layered silver-based inorganic antibacterial fiber” jointly developed by the China Academy of Textile Sciences and Beijing Setri uses ultra-fine silver ion phosphate crystal powder as inorganic filler, which is first mixed with polyester melt to form an antibacterial masterbatch. Then a certain proportion of antibacterial masterbatch is added during spinning to produce permanent antibacterial polyester fiber. The antibacterial polyester fiber has the characteristics of no antibacterial agent dissolving, no changing the color of the fiber, and good spinnability.
2. New achievements in nano-antibacterial technology
Xtep Nano Antibacterial Technology: Nano anti-silver antibacterial sports shoes jointly developed by the Institute of Physics and Chemistry of the Chinese Academy of Sciences, making Xtep the first domestic antibacterial sports shoe company to reach the international level. At the same time, it is the world’s first generation of nano-silver antibacterial sports shoes, marking the entry of Chinese sports shoes into the high-tech field.
Nano-antibacterial bio-protein fiber technology and achievements: The “Nano anti-bacterial bio-protein fiber” project jointly developed by three companies including the Institute of Process Engineering of the Chinese Academy of Sciences uses viscose spinning technology to prepare anti-bacterial functional protein fibers, which is technologically innovative. sex, filling the domestic gap and ranking at the international leading level. The invention of this technology marks the first time that humans have successfully connected modern biotechnology with modern textile technology. It also marks the beginning of a new high-tech industry leading the world’s wool fiber industry revolution and a new generation.
3. Several issues in the production of nano-antibacterial materials
In recent years, the research and development of nanopowder-modified textile polymer materials and nanoprinting and dyeing technology based on nanomaterials and nanotechnology have been very prosperous, and some results have been achieved in the high performance and functionalization of textile products. It has achieved industrialization to a certain extent, effectively promoted the development of high-tech printing and dyeing industry, and improved the level of traditional printing and dyeing products.
Antibacterial textiles are an important direction for the upgrading of wearing and living textiles. Antibacterial fibers and antibacterial fabrics can effectively prevent the reproduction and growth of microorganisms on fiber fabrics, have hygienic and self-cleaning functions, and have deodorizing effects. Antibacterial fiber contains antibacterial agents. After strong effects such as washing and surface abrasion, the antibacterial effect of the fiber hardly decreases.
The key to developing antibacterial fibers is to simultaneously achieve the requirements of antibacterial properties, safety of products in fiber production and processability during spinning applications. Inorganic antibacterial agents are a new type of long-acting, broad-spectrum, efficient and safe antibacterial agents. In addition, the high temperature resistance of inorganic antibacterial agents cannot be achieved by other types of antibacterial agents.
Antibacterial fiber can be achieved through antibacterial masterbatch technology. Antibacterial masterbatch is a form in which antibacterial agents exist in high concentrations in polymer body materials. The purpose of using antibacterial masterbatch is to facilitate the dispersion of the antibacterial agent, because the antibacterial agent has been pre-dispersed in the masterbatch. More importantly, masterbatch technology can suppress the discoloration problem of antibacterial agents. Otherwise, silver-containing antibacterial agents will generally discolor during use or in molded products.
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