The composite material of silica (silicon dioxide, SiO₂) and silica gel (polysiloxane) has shown significant application potential in the antibacterial field due to its unique physical and chemical properties. In recent years, researchers have significantly improved the antibacterial properties of silica gel through surface modification, antibacterial agent loading or doping.

1. Antibacterial mechanism
Physical antibacterial effect: The high specific surface area and pore structure of silica can adsorb bacterial cells, destroy their membrane structure, and cause leakage of cell contents.
Chemical antibacterial effect: By surface grafting or loading antibacterial agents (such as silver ions, zinc ions, quaternary ammonium salts, etc.), active substances are released to inhibit bacterial growth.
Photocatalytic antibacterial effect: After doping with photocatalysts such as titanium dioxide (TiO₂), free radicals are generated under light to oxidize bacterial cell membranes.

2. Methods to improve antibacterial performance
Surface modification:
Silanization treatment: Grafting silane coupling agent (such as 3-aminopropyltriethoxysilane) onto the surface of silica to enhance compatibility with the silica matrix and introduce antibacterial groups.
Nano coating: Coating the surface of silica with antibacterial coating by sol-gel method to improve the loading stability of antibacterial agent.
Antibacterial agent loading:
Silver ion loading: Silver ions are loaded into the pores of silica by ion exchange or in-situ reduction method to release silver ions to inhibit bacterial growth.
Antibacterial polymer grafting: Grafting antibacterial polymers such as chitosan and polyethyleneimine onto the surface of silica to enhance antibacterial durability.
Doping modification:
Rare earth element doping: Doping with rare earth elements such as lanthanum (La) and cerium (Ce) to improve antibacterial activity and stability.
Metal oxide composite: Composite with zinc oxide (ZnO), copper oxide (CuO), etc., using the antibacterial effect of metal ions.

Middle Viscosity Silicone Oils, plz check MY201V50 - 201V1000