In nature, harmful bacteria, fungi, viruses and other microorganisms are widely distributed, and they grow, multiply or mutate under certain conditions, which are the main reasons for human infections and diseases. Therefore, the development and application of antibacterial materials and antibacterial products have attracted attention from all over the world. Compared with organic antibacterial agents, inorganic antibacterial agents have the characteristics of high safety, good heat resistance and antibacterial durability; in addition, with the in-depth research of nanotechnology, nanoparticles and nanomaterials have become one of the research hotspots in the field of materials science. , Studies have shown that the antibacterial performance will be greatly enhanced after the nanometerization of the antibacterial agent. Therefore, nano-scale inorganic antibacterial agents have a lot of room for development.
Compared with ordinary silver powder, nano-silver power has the unique surface effect, volume effect, quantum size effect and macro-quantum tunneling effect of nano-materials. It has a strong inhibitory and killing effect on dozens of pathogenic microorganisms such as Escherichia coli, Neisseria gonorrhoeae, Chlamydia trachomatis, and will not produce drug resistance. Animal experiments show that even if the amount of this nano-silver antibacterial powder reaches several thousand times the standard dose, the tested animals have no signs of poisoning. At the same time, it also promotes the repair of damaged epithelial cells. It is worth mentioning that the antibacterial effect of this product when exposed to water is increasingly enhanced, which is more conducive to the treatment of diseases.
The main application areas of nano silver antibacterial include environmental protection, textiles and clothing, fruit preservation, food hygiene, fibers (fabrics, finished products), information industry, ecological environment, daily necessities, etc. Its detailed applications: cotton, linen, silk, polyester, acrylic, spandex, viscose fiber, protein fiber, finished fabrics, clothing, bedding, daily textiles, toys, etc., aquaculture, gardening facilities, soil improvement, building materials, Decorative materials, detergents, glassware, packaging paper products, paper for special industries, deodorants, antibacterial gels for external use in medicine, and plastic products.
Antibacterial mechanism of inorganic nano silver antibacterial agent
The biggest difference between nano-silver inorganic antibacterial agents and organic antibacterial agents is that the use of organic antibacterial agents can easily make bacteria resistant, and improper use can cause harm to the human body, while the use of nano-silver inorganic antibacterial agents will not cause bacteria at any time Produce drug resistance and have antibacterial durability. The antibacterial mechanism generally has the following aspects:
- The effective ingredients in antibacterial fibers act on cell membrane proteins. It can directly destroy the bacterial cell membrane and cause the cell contents to ooze out. Nano silver and organic antibacterial agents are adsorbed on the cell membrane, hindering bacteria and other microorganisms from absorbing amino acids, uracil and other nutrients necessary for growth, thereby inhibiting their growth.
- The far infrared rays emitted from the surface of the antibacterial fabric have a certain wavelength range, which can inhibit the activity of bacteria and cause the death of bacteria.
- The surface catalysis of nano-silver affects the normal metabolism and reproduction of bacteria, leading to the death of bacteria.
Anti-microbial category
1) Common pathogenic bacteria: Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Salmonella, etc.
2) Common pathogenic fungi: pathogenic molds such as Aspergillus flavus, Aspergillus nidulans, Penicillium citrinum, etc.; yeasts such as Candida albicans, etc.
3) Common molds that pollute the environment: Aspergillus niger, Aureobasidium pullulans, Paecilomyces variabilis and Trichoderma viride, etc. https://www.hwnanomaterial.com