The bactericidal activities of two series of quaternary Gemini surfactants have been examined by the suspension quantitative germicidal tests against Escherchia, Staphylococcus aureus and Candida alibicans respectivel...The bactericidal activities of two series of quaternary Gemini surfactants have been examined by the suspension quantitative germicidal tests against Escherchia, Staphylococcus aureus and Candida alibicans respectively, the dodecyltrimethylammonium bromide(C 12TABr) was used for comparison. All of the quaternary Gemini surfactants showed superior bactericidal activities to C 12TABr due to higher densities in both headgroup charge and alkyl chains.展开更多
以α,ω-含氢硅油(α,ω-PHMS)和烯丙基环氧基聚醚(APEE)为原料,无水乙醇为溶剂,在铂催化下,通过硅氢加成合成环氧基聚醚聚硅氧烷(EPEPS),再与N,N-二甲基十二烷基叔胺(DMA12)进行开环反应,制得一种新型季铵盐型有机硅双子表面活性剂(QSG...以α,ω-含氢硅油(α,ω-PHMS)和烯丙基环氧基聚醚(APEE)为原料,无水乙醇为溶剂,在铂催化下,通过硅氢加成合成环氧基聚醚聚硅氧烷(EPEPS),再与N,N-二甲基十二烷基叔胺(DMA12)进行开环反应,制得一种新型季铵盐型有机硅双子表面活性剂(QSGS).用红外光谱(IR)对QSGS和EPEPS的结构进行了表征,并对QSGS的临界胶束浓度(cmc)、表面张力、发泡力、耐酸碱盐稳定性和在硬水中的稳定性等进行了测定.结果表明:QSGS水溶液的cmc为1.6 g/L,cmc处表面张力(γcmc)为25.5 m N/m.质量分数为0.5%的QSGS水溶液发泡力为1.63,5 min稳泡性为0.158,在硬水中的稳定性为5级.QSGS溶液具有很好的耐酸、耐碱、耐盐等化学稳定性.展开更多
文摘The bactericidal activities of two series of quaternary Gemini surfactants have been examined by the suspension quantitative germicidal tests against Escherchia, Staphylococcus aureus and Candida alibicans respectively, the dodecyltrimethylammonium bromide(C 12TABr) was used for comparison. All of the quaternary Gemini surfactants showed superior bactericidal activities to C 12TABr due to higher densities in both headgroup charge and alkyl chains.
文摘以α,ω-含氢硅油(α,ω-PHMS)和烯丙基环氧基聚醚(APEE)为原料,无水乙醇为溶剂,在铂催化下,通过硅氢加成合成环氧基聚醚聚硅氧烷(EPEPS),再与N,N-二甲基十二烷基叔胺(DMA12)进行开环反应,制得一种新型季铵盐型有机硅双子表面活性剂(QSGS).用红外光谱(IR)对QSGS和EPEPS的结构进行了表征,并对QSGS的临界胶束浓度(cmc)、表面张力、发泡力、耐酸碱盐稳定性和在硬水中的稳定性等进行了测定.结果表明:QSGS水溶液的cmc为1.6 g/L,cmc处表面张力(γcmc)为25.5 m N/m.质量分数为0.5%的QSGS水溶液发泡力为1.63,5 min稳泡性为0.158,在硬水中的稳定性为5级.QSGS溶液具有很好的耐酸、耐碱、耐盐等化学稳定性.
