Thermal stability and long-acting antibacterial activity ofphosphonium montmorillonites

来源期刊：中南大学学报(英文版)2010年第3期

论文作者：蔡祥 谭绍早 廖马花 吴婷 刘任富 余彪

文章页码：485 - 491

Key words：phosphonium montmorillonite; quaternary salts; surfactant; microstructure; thermal stability; long-acting antibacterial activity; water resistance

Abstract: Na-montruorillonite (Na-MMT) was exchanged with three quaternary alkylphosphonium salts: decyl tributylphosphonium bromide (DTBPBr), dodecyl tributylphosphonium bromide (DDTBPBr) and hexadecyl tributylphosphonium bromide (HDTBPBr), to investigate the effects of phosphonium salts species and relative molecular mass on the characteristics, morphology, thermal stability and long-acting antibacterial property of phosphonium montmorillonites. The resulting modified montmorillonites were characterized by the FTIR, XRD, TEM, and TG/DTG techniques. And minimum inhibitory concentration (MIC) was used to investigate antibacterial activity. The results show that the phosphonium salts are intercalated into Na-MMT, and the basal spacing of P-MMTs is enlarged with the increase of phosphonium salt content or the growth of alkyl chain length. DDTBP-MMT-3 with 19.83% (mass fraction) of dodecyl tributylphosphonium salts, displays excellent thermal stability and long-acting antibacterial activity.

基金信息：the National Natural Science Foundation of China
the Natural Science Foundation of Guangdong Province, China
the Foundation of Enterprise-University-Research Institute Cooperation from Guangdong Province and Ministry of Education of China