Nano-Silver as a special form of the metal silver, refers to the particle size of powders of 1~100nm metallic silver granules. Since the particles are extremely small and large surface area, so that it will have significant surface effects, quantum size effect and the quantum tunneling effect, which makes silver with superior permeability activity and its bactericidal effect is hundreds of times times the ordinary silver. In addition, due to the nano-scale electronic properties of metallic silver, it can be used with sparse radicals on bacterial proteins, amino group electron withdrawing groups formed, such as ligand, which further enhances the antibacterial effect. Is a new class of Nano Silver antimicrobial agent, has a strong bacteriostatic and bactericidal action and a broad spectrum of antibacterial activity, and inorganic antibacterial effect of antibacterial agent is unable to compare with traditional, non–resistance, and high security. With the serious of antibiotic bacterial resistance, study and application of Nano-Silver disinfect areas increasingly wide attention.
Humans found Silver Nanoparticles Antimicrobial for a long time, as early as in ancient times, useful silver food storage to prevent bacteria growth record. With the progress of science and technology, it was discovered that silver is a safe and broad spectrum bactericidal materials apply it gradually spread. Now clinical Shang people has widely using sulfa pyrimidine silver, and fluoride piperazine acid silver, and zinc silver breast cream, and sulfa pyrimidine silver collagen protein film, and irradiation fluoride silver pigskin, treatment Burns burns to prevent green pus bacteria, bacteria of reproduction, nitric acid silver water solution as eye anti-inflammatory, and Silver Mercury alloy as dental material and the containing silver water solution treatment toothache, and glue State silver in gynecological lotion in the are application widely. Also available on a daily basis in activated carbon containing silver or silver woven filters purify drinking water, and so on.
Silver Nanoparticles principle. Nano Silver due to its structure unit size between macro material and micro Atomic and molecular Zhijian, performance out special of surface effect, and small size effect, and quantum size effect and macro quantum tunnel effect, can easily to entered disease original body; Nano Silver particles size small, surface by accounted for of volume percentage big, surface of key State and electronic State and particles internal different, surface Atomic distribution bit not congruent led to surface of activity location increased, has has as antibacterial agent of basic conditions; has is strong penetrating force, Have full access to and attack pathogens, thereby fostering stronger biological effects, high security, and antibacterial wide advantages of long continuous sterilization time. Antibacterial properties of silver nanoparticles in particular, pathogenic bacteria, cocci, bacteria killing effect of silver ion is much larger than the traditional disinfectant. Silver nano-particles can kill bacteria, fungi, Mycoplasma, chlamydia, and other disease-causing organisms.
Nano Silver antibacterial agent of role main including 3 a links and pathogens metabolism enzyme in the of sh base combines, makes enzyme lost live and exposed of bacteria cell wall occurred peptide poly sugar reaction, formed reversible composite real, makes bacteria cannot will oxygen and energy trans-into cell and pathogenic microbial in the of DNA combines, led to DNA structure degeneration, inhibition DNA copy. In addition, the Nano-Silver and non-antibiotic antimicrobial agent, of silver ions do not develop resistance in bacteria, is a long-acting antibiotic agents.
Application of Nano-Silver. Nano-materials because of their size decreases, surface area, surface energy and surface tension are greatly increased, with volume effect and quantum size effect, make it light, heat, electric, magnetic, mechanical and chemical properties is quite different from the traditional characteristics of materials. Silver nano-particles with UV resistance, absorption of visible and infrared radiation, high strength and toughness, good conductivity and shielding effects, antimicrobial, antiseptic, deodorant, and other outstanding features. At present, Nano-Silver anti-bacterial nonwovens material of a variety of medical, health, household and industrial use of antibacterial products already listed.