Preparation and Bactericidal Properties of Nano-SiO2 Grafted with Macromolecular Quaternary Ammonium Salts Derivative of Alkylated Polyethylenimines
Water-soluble polyethylenimine (PEI) was grafted onto the surface of nano-SiO2 particles through the intermedium effect of 4-bromobutyryl chloride,and the water-insoluble SiO2 containing macromolecular quaternary ammonium salts (MQAS/SiO2) was prepared followed by the N-alkylation of coated PEI with 1-bromohexane and idomethane.The results of FT-IR analysis testified that PEI is successfully immobilized on the surface of SiO2 nanoparticles.The minimum inhibitory concentrations of MQAS/SiO2 against Gram-positive bacterium,Staphylococcus aureus,and Gram-negative bacterium,Escherichia coli,are 100ug/ml and 1200ug/ml,respectively.The bactericidal efficiency of exhaustively washed MQAS/SiO2 did not decline significantly compared to the MQAS/SiO2 without washing.
Macromolecular antimicrobial Quaternary ammonium salts Bactericidal properties
Yuangen Wu Hui Tong Shuyi Qiu Xiao Wang
Guizhou Province Key Laboratory of Fermentation Engineering and Biopharmacy,Guizhou University,Guiya Guizhou Province Key Laboratory of Fermentation Engineering and Biopharmacy,Guizhou University,Guiya
国际会议
The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))
长沙
英文
1519-1522
2007-05-10（万方平台首次上网日期，不代表论文的发表时间）