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Nano silver antibacterial agent description

Edit: Ccdanni 2020-02-11 Mobile

Nano silver antibacterial agent description Tags:Nano Copper 

  1.Know about nano silver

  What is nano silver?

  Nano-silver: It means that the particle size is nano-sized metal simple substance.

  1 nanometer (nm) = one billionth of a meter

  (1) The main characteristics of nano silver:

  A. Bacteriostatic, antibacterial, bactericidal; can effectively kill and inhibit more than 650 microbial bacteria;

  B. Anti-mold and anti-odor;

  C, environmental protection, non-toxic and harmless to humans and animals;

  D. High safety, good heat resistance, wide antibacterial range, long effective period of continuous sterilization.

  It is a long-acting antibacterial agent, a non-antibiotic type antibacterial agent, belongs to the inorganic antibacterial series, and does not produce drug resistance.

  (2) Antibacterial mechanism of nano silver

  First, because of the structural unit size between macroscopic matter and microscopic atoms and molecules, nanosilver exhibits special surface effects, small size effects, quantum size effects, and macroscopic quantum tunneling effects, and can easily enter pathogens;

  The second is that the size of the nano-silver particles is small, the volume percentage occupied by the surface is large, the bond states and electronic states of the surface are different from the interior of the particle, and the surface atomic coordination is incomplete, which leads to an increase in the active sites on the surface.

  Third, it has strong penetrating power, can fully and fully contact and attack pathogens, thereby exerting stronger biological effects, has the advantages of high safety, wide antibacterial range, and long continuous sterilization time. The antibacterial properties of nano-silver, especially the killing effect of pathogenic bacilli, cocci and mycelia, are far greater than traditional silver ion bactericides. Nano silver particles can kill bacteria, fungi, mycoplasma, chlamydia and other pathogenic microorganisms.


  2.Specific antibacterial and sterilization steps of nano silver

  Four step process

  The first step: After the silver nanoparticles are combined with the cell membrane (wall) of the pathogenic bacteria, they enter the bacteria body;

  Step 2: Quickly combine with the thiol group of the oxygen metabolism enzyme to inactivate the respiratory enzymes of the pathogenic bacteria;

  The third step: the respiratory metabolism of the pathogenic bacteria is blocked, suffocate and die;

  Step 4: The bacterial cell membrane is ruptured and nano-silver is released from the pathogen.

  The above four steps are all completed in a short time.

  3.Development and application of Chinese and global nano-silver

  Nano silver preparation technology is mainly developed in economically developed countries. At the end of the last century, with the advent of nanotechnology, scientists discovered that nano-scale materials can be widely used in many high-precision and cutting-edge technologies. , Gradually began to study its application and promotion, and has been well applied in aerospace, electronics, polymer materials and communications equipment, and has made great contributions to scientific and technological progress. However, due to its expensive preparation cost, there has been no great breakthrough in the popularization of civilian daily applications, especially in the replacement of organic antibacterial agents. Until the past 3 years, Japan, South Korea, and the United States have gradually reduced their costs due to the use of chemical preparation methods. They have gradually been promoted to civilian daily chemicals, such as nano-silver shampoo, nano-silver toothpaste, and nano-silver. Soap and more. Some brands even started to brand domestically to promote the new concept of nano silver.

  Chinese companies are also beginning to be involved in nanosilver applications. According to incomplete statistics, there are no less than 500 companies involved in the application and development of nano-silver materials in China, and no more than 50 companies can truly produce nano-silver. Of these 50 companies, very few have nano silver research and development capabilities, and they are mainly based on technology transfer from South Korea, Japan, and Taiwan. A common feature of China's current development of nano-silver is that it has unstable quality, uneven particles, and large particles (all in the range of 30-300 nm), which cannot reach less than 10 nm; the second is that the preparation cost is still relatively high, and it is not yet compatible with existing civilian organic The cost of antibacterial agents is compared. Third, the market is mixed, and most of them are impersonating nano silver with silver ions, such as colorless and transparent nano silver.

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