纳米银抗菌原理：
- 破坏细胞壁、细胞膜。 纳米银颗粒可以与细菌的细胞壁以及细胞膜结合。当带正电荷的纳米银颗粒遇到表面带负电荷的细菌时，会产生静电力，从而促进两者间的相互吸引和相互作用，使纳米银吸附在细胞膜上。
- 影响菌体内环境。 在液体环境中，纳米银受质子作用会释放出Ag，或受O2作用被氧化成Ag2O再释放出Ag，发挥抗菌作用。
- 损伤细菌DNA。 DNA分子只有在松弛解旋状态下才能有效地进行复制，而纳米银和Ag+进入菌体后会与含大量电子原子的细胞核、拟核和线粒体DNA分子相互作用，使其发生明显的皱缩，抑制DNA的复制从而阻止细菌繁殖。
- 产生活性氧自由基。 吸附在菌体表面微量的Ag能激活水或空气中的氧，产生羟自由基及活性氧离子，进一步氧化菌体外膜从而抑制或杀死细菌。
Antibacterial principle of nanosilver:
1.To destroy the cell wall, and cell membranes. Silver nanoparticles can bind to the cell wall of bacteria as well as to the cell membrane. When the positively charged silver particles encounter the negatively charged bacteria on the surface, they will produce electrostatic force, which promotes the mutual attraction and interaction between the two, making the cell membrane.
2.Affect the internal environment of the bacteria. In liquid environment, Ag is released by proton, or Ag is oxidized into Ag2O by O2, exerting antibacterial effect.
3.Damage to the bacterial DNA. DNA molecules can replicate efficiently only in the relaxed unwinding state, while silver and Ag + enter the bacteria will interact with the nucleus, nucleomimetic and mitochondrial DNA molecules containing a large number of electronic atoms, crumple, inhibit DNA replication and thus prevent bacterial reproduction.
4.The generation of reactive oxygen free radicals. A small amount of Ag adsorbed on the surface of bacteria can activate oxygen in water or air, produce hydroxyl radicals and reactive oxygen ions, and further oxidize the extracorporeal membrane to inhibit or kill bacteria.
