The application discloses a kind of high-efficiency antibacterial modified
silica gel and preparation method thereof, with food-grade liquid
silica gel as matrix, using
polylactic acid-
polylysine block
copolymer as degradable biological antibacterial unit, through
silane coupling agent in situ covalent graft modification under
room temperature ultraviolet light, make antibacterial unit firmly bonded in
silica gel molecular chain.The obtained silica gel antibacterial rate is greater than or equal to 99.9%, and there is no
precipitation after multiple water boiling disinfection, the antibacterial unit is biodegradable, the process is green, low
energy consumption, no harmful substance residue, high safety, suitable for infant nipple,
dental cement and other entry products, solve the problems such as easy
precipitation, non-degradable and environmental unfriendly of traditional antibacterial silica gel.