What is the antibacterial principle of antibacterial stainless steel? What is the field of applicati

The antibacterial principle of antibacterial fabric is to destroy the cell wall of bacteria, because the intracellular osmotic pressure is 20-30 times that of the extracellular osmotic pressure, the cell membrane is ruptured and the cytoplasm is leaked, which also terminates the metabolic process of microorganisms, so that microorganisms cannot grow and reproduce. Antibacterial fabrics that have been treated with antibacterial treatment can be antibacterial, but it depends on what bacteria are resistant to during antibacterial treatment, some special strains need special antibacterial agents to treat, not that an antibacterial fabric can resist all bacteria, some antibacterial agents are against bacteria, some are against mold, and some are against yeast, so it depends on the applicability of antibacterial agents.

With the increase of awareness of hygiene and antibacterial in food, medical and ordinary households, the demand for antibacterial function in the development period of various products is becoming increasingly strong, so many antibacterial materials with both structural function and antibacterial function have been developed. Among the antibacterial metal materials, the representative is the new antibacterial stainless steel developed by the Institute of Metal Research of the Academy at the beginning of this century. Antimicrobial stainless steel is a stainless steel material that prevents bacteria from multiplying, killing, or suppressing bacteria at a low level.

It has the characteristics of high strength, corrosion resistance and aesthetics of ordinary stainless steel, and has the antibacterial characteristics that ordinary stainless steel does not have, and can be applied to various places where bacteria spread and are prone to cross-infection.

Antibacterial stainless steel is a kind of structural and functional integration material, which has a broad application market in the fields of tableware and kitchenware, sanitary ware, medical treatment, household appliances and food processing, and has important practical significance for effectively preventing the spread of germs, preventing cross-infection and improving public health. The following is a brief introduction to the antimicrobial properties of antimicrobial stainless steel, its antimicrobial effect in different civil environments and its possible applications in related fields.

1. The surface of antibacterial stainless steel can release metal Cu ions with S bacteria function, mainly through electrostatic adsorption of S bacteria, metal dissolution of S bacteria and other mechanisms to produce antibacterial effects.

2. Antibacterial metal ions are adsorbed to the surface of negatively charged bacteria by Coulomb attraction, causing damage to the bacterial cell wall; Or it can further penetrate the cell wall and enter the bacteria, and react with sulfur and nitrogen-containing functional groups such as sulfur and amino groups in it, so that the protein is denatured and the cell synthase is inactive.

Bacteriostatic - highly effective.

1. In the bacterial concentration environment below 106CFU (102CFU in the normal environment), the sterilization rate of antibacterial stainless steel against common bacteria such as Escherichia coli and Staphylococcus aureus is more than 99%.

Bacteriostatic - antimicrobial persistence.

1. After repeated rubbing with 400 sandpaper (500 times) on the surface of antibacterial stainless steel, its antibacterial performance does not have any attenuation;

2. After soaking the antibacterial stainless steel sample in water for a long time (7 months), its antibacterial performance was not affected;

Antibacterial mechanism, characteristics, application and development status of various antibacterial stainless steel materials (including antibacterial stainless steel with copper and silver, surface coating antibacterial stainless steel, antibacterial composite stainless steel plate) Add a certain amount of antibacterial metal elements Cu, Ag, Zn, etc. to ordinary stainless steel, control the casting, forging, rolling and heat treatment process, so that the antibacterial metal elements are evenly dispersed in a certain size and form in the stainless steel matrix, and the volume percentage of the precipitated phase is guaranteed. Without reducing the mechanical properties and anti-corrosion properties of ordinary stainless steel, it is endowed with excellent antibacterial properties.

3. The sterilization performance of antibacterial stainless steel in the range of 0-40 does not change with time;

The difference between stainless steel and electroplated stainless steel is: stainless steel is an alloy steel with a uniform texture that does not rust; The electroplating stainless steel is to electroplating a layer of other metals (such as chromium, nickel, copper, gold, etc.) that do not rust on the surface of stainless steel, which not only has anti-rust properties, but also improves its brazing properties, reduces high-temperature oxidation, improves thermal conductivity and electrical conductivity, improves lubricity, improves finish, and is decorative when manufacturing springs or wire drawing. The relevant introduction of stainless steel is as follows:

1. The research team led by Yang Ke, a researcher from the Institute of Metals, Chinese Academy of Sciences, developed a new type of material with structure, corrosion resistance and antibacterial functions - antibacterial stainless steel, which has passed the appraisal of scientific and technological achievements organized by the Shenyang Science and Technology Bureau. The expert committee unanimously agreed that this achievement has filled the domestic gap and reached the international advanced level of similar materials. 2. The effect has been tested by authoritative units, and the killing rate of antibacterial stainless steel against Escherichia coli and Staphylococcus aureus is more than 99%, and it also has a significant killing effect on other bacteria such as Candida albicans and Melanistium, showing excellent broad-spectrum antibacterial and antibacterial persistence.

The testing of the National Institute for the Control of Drugs and Biological Products shows that the antibacterial stainless steel fully meets the national technical standards in terms of toxicity and human safety. While endowing stainless steel with antibacterial properties, the material's mechanics, corrosion resistance, cold and hot processing, welding and other properties are equivalent to those of the original stainless steel. 3. The successful development of antibacterial stainless steel provides a broad space for the development of antibacterial products.

The development potential of antibacterial stainless steel products is huge, and the market prospect is extremely broad. In today's society, many domestic manufacturers have expressed strong interest in antibacterial stainless steel, and the research group is actively seeking support for the pilot test, and strive to make the results into commodities as soon as possible.

Antibacterial stainless steel has an antibacterial effect.

Antibacterial stainless steel is generally added to stainless steel, adding some special metal elements, commonly used is to add "copper", so that stainless steel has antibacterial function. Compared with traditional stainless steel, copper-containing antimicrobial stainless steel contains more copper inside than traditional stainless steel.

After contact with E. coli, the copper in the enrichment phase on the surface of the antimicrobial stainless steel is dissolved in the form of Cu+2 and reacts with the bacteria, resulting in the death of the bacteria.

Antimicrobial function of stainless steel.

Copper-containing antibacterial stainless steel can inhibit the formation of bacteria, viruses and other pathogenic microbial films, effectively prevent the spread of germs, and prevent cross-infection. It has strong antibacterial properties against Escherichia coli and Staphylococcus aureus; When the copper content in stainless steel is reached, the sterilization rate of stainless steel against Escherichia coli and staphylococci is 99%.

Antibacterial stainless steel, which has both the corrosion resistance and excellent antibacterial properties of stainless steel, can be used as a structural material like ordinary stainless steel, and also has decorative and beautification functions.

<> antibacterial stainless steel refers to the addition of an appropriate amount of chemical elements with antibacterial effect to a certain composition of stainless steel.

For example, copper, silver, etc., after antibacterial treatment, make itIt has stable processability and good antibacterial propertiesa type of stainless steel. Antimicrobial stainless steel is a kind ofA new material with structure, corrosion resistance and antimicrobial functions.

Different antimicrobial elements have different antimicrobial effects, when in contact with bacteria, copper, zinc, and newly studied rare earth metals.

Metal ions enter the cells of bacteria, pass through and enzymes in bacteria.

Binding thus inactivates the bacteria and exerts a good antibacterial effect.

The antibacterial ability of stainless steel is mainly due to the presence of antibacterial phase in stainless steel, and the antibacterial phase is relatively small and diffusely releasedTherefore, stainless steel should be subjected to appropriate antibacterial heat treatment, and stainless steel that has not undergone antibacterial heat treatment is only solution treated.

and not time-barred.

The stainless steel is not much obvious antibacterial effect.

Antibacterial stainless steel is classified according to different classification methods, namely according to the manufacturing method and the addition of antibacterial elements.

Classified by manufacturing methodThere are: surface coating antibacterial non-focal rust steel, composite antibacterial stainless steel, surface modified antibacterial stainless steel, and overall added antibacterial element stainless steel.

Classified according to the addition of antimicrobial elementsThere are: copper-containing antibacterial stainless steel, silver-containing antibacterial stainless steel, zinc-containing antibacterial stainless steel, and other alloy antibacterial stainless steel.

Antimicrobial stainless steelMeet the manufacturing requirements of various medical devicesTo meet the requirements of sterility, it can greatly reduce the trouble of repeated disinfection and ensure the sterility of the instrument under normal conditions.

It is used in the manufacture of various facilities of medical units, such as bathroom utensils, cutlery, work tops, etc., andA variety of facilities in and out of hospital access sites, such as door handles, handrails, food delivery carts, etc., can effectively prevent the spread of germs and cross-infection.

It is used in a variety of pharmaceutical machinery and containers to ensure a clean environment in the production of medicinesIt is used in a variety of food processing, storage and transportation equipmentto ensure sterility.

Antimicrobial stainless steelIn the process of smelting and casting, a certain amount of disturbance is addedSpecial antimicrobial metallic elements, thus obtaining certain antimicrobial properties. These antibacterial metal elements in stainless steel are evenly dispersed, and when the metal elements are in contact with bacteria, they will undergo a chemical reaction, so as to achieve the effect of destroying bacteria. Copper（cu）、Silver（ag）、Zinc(zn) is a common antimicrobial metallic element.

<> the silver ions distributed in stainless steel have a variety of pathways to resist bacteria.

1.Destruction of bacterial cell walls: Silver ions can react with the cell wall (peptidoglycan) of bacteria, causing structural destruction of bacteria and loss of certain functions.

2.Affects cell membrane permeability: The action of silver ions affects the permeability of bacterial cell membranes, thus making the bacterial cell membranes lose their transport function.

3.Inhibits bacterial protein synthesis: Silver ions can enter the inside of the cell through the cell wall of the bacteria. By inhibiting bacterial protein synthesis, it hinders the decomposition of bacterial proteins, thereby inhibiting bacterial growth, metabolism and reproduction.

4.Blocks bacterial DNA replication: Silver ions affect bacteria to produce active free radicals, which bind to DNA and replace with hydrogen atoms in the double helix structure of DNA molecules, resulting in deformation of bacterial DNA molecular structure.

If the structure of the DNA is changed, the expressed genes of the bacteria cannot be replicated, transcribed, or translated. In turn, it affects the physiological activities of bacteria and inactivates them.

Antimicrobial stainless steel with zinc added when it comes into contact with bacteria. Because zinc ions are reducible, they can undergo redox reactions with organic matter in bacteria. First, it binds to bacterial cell membranes and proteins, destroying its structure.

It then enters the cell and disrupts the enzyme of the electron transport process and reacts with DNA to achieve antibacterial purposes.

The copper ions distributed in stainless steel are similar to the principle of zinc atoms when they come into contact with bacteria, first reacting chemically with the bacterial outer membrane, causing the bacterial outer membrane of the bacteria to rupture. Then, as the outer cell membrane of the bacteria is damaged, the nutrients in the cells are released, and the water will also be lost, and eventually the bacteria will shrink and inactivate, so as to achieve the purpose of sterilization.

Stainless steel antibacterial material has antibacterial efficiency and antibacterial durability due to its own physical properties, so that the antibacterial and bactericidal properties of antibacterial stainless steel are more prominent. Therefore, antimicrobial stainless steel is widely used in many fields of daily life.

Antimicrobial materials have been used for a long time。In ancient China, people skillfully used containingAntimicrobial substances of plants or mineralsetc. on the woundAntibacterial and anti-inflammatory to prevent infection。By the end of the 20th century, the worldVarious public health incidents are frequent, antimicrobial material begins inDeveloped countrieshas been developed rapidly and is used inPeople produce and liveof all aspects.

Stainless steelIt is one of the most widely used metal materials, along withPeople's yearning for a better life is growing day by day, inExcellent antioxidantwithRust resistanceOn the basis of taking into accountGood antimicrobial propertiesThe stainless steel has become a sought-after product. I would like to share with you from the following two aspectsStainless steel antimicrobial principle