As a typical two-dimensional nanomaterial, graphene is composed of a hydrophobic plane structure and a hydrophilic edge. The special structure determines its excellent antibacterial properties. Among many antibacterial mechanisms, graphene acts on the bactericidal mechanism of bacterial membrane surface, especially the important role of MIEs (Molecular Initiating Events, initiating molecular reactions) in different bactericidal mechanisms.

Antibacterial principle of graphene:

1. The physical cutting approach, that is, after the bacteria and the graphene-based material are in direct contact, the sharp sheet of the material pierces the bacterial cell membrane, causing the outflow of the cell contents and killing the bacteria;

2. The oxidative stress pathway, that is, after the cell membrane is in direct contact with the graphene-based material, the free radical reaction is stimulated through the transfer of charge or the generation of ROS, thereby destroying the membrane structure of bacteria and important biological macromolecules and dying;

3. Destruction of the lipid molecule pathway, that is, graphene nanosheets can be inserted into the bacterial cell membrane in a short time to extract the phospholipid components, or directly spread on the surface of the cell membrane to trigger lipid molecule turnover, eventually leading to bacterial lysis and death.

Graphene antibacterial application range:

Graphene virus-killing and antibacterial cloth has broad application space and market prospects. It can quickly kill viruses and bacteria in the air and water. It has been widely used in masks and protective equipment, air filters, space sterilization, sanitary protection products and other fields. Applied to functional products such as clothing and fabrics, applied to food, fresh fruit, food sterilization and preservation, applied to sterilization of water and sewage, applied to sterilization and disinfection of equipment, can be used as electrostatic protection material and radiation protection material The spread of the coronavirus-like virus is an effective prevention and control weapon to eliminate the epidemic.