A systematic study on the synthesis and antibacterial activity of the quaternary "onium" salts grafted on an insoluble "gel-type" styrene-7% divinylbenzene copolymer by polymer-analogous reactions ...A systematic study on the synthesis and antibacterial activity of the quaternary "onium" salts grafted on an insoluble "gel-type" styrene-7% divinylbenzene copolymer by polymer-analogous reactions is showed. Antibacterial activity of quaternary ammonium and/or phosphonium salts grafted on polymer-supports has been studied against Staphylococcus aureus and Escherichia coli. A wide variety of "onium" salts bound to macromolecular supports with different quaternary groups and different quaternary chain length substituents were examined. The antibacterial activity of mixed "onium" salts increases as a consequence of the association of ammonium and phosphonium salts grafted on the same polymeric support.展开更多
Na-montruorillonite (Na-MMT) was exchanged with three quaternary atkylphosphonium salts: decyl tributylphosphonium bromide (DTBPBr), dodecyl tributylphosphonium bromide (DDTBPBr) and hexadecyl tributylphosphoni...Na-montruorillonite (Na-MMT) was exchanged with three quaternary atkylphosphonium 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.展开更多
制备季铵盐类抗菌剂——N,N-二甲基-N-[3-(三甲氧基硅烷基)丙基]十二烷-1-氯化胺(CDMA)和胍盐类抗菌剂——聚六亚甲基胍盐酸盐(PHMG),并对PHMG进行双键化获得MAPHMG,通过高效质谱仪(HRMS)和核磁共振氢谱(1 H NMR)验证抗菌剂的合成。将C...制备季铵盐类抗菌剂——N,N-二甲基-N-[3-(三甲氧基硅烷基)丙基]十二烷-1-氯化胺(CDMA)和胍盐类抗菌剂——聚六亚甲基胍盐酸盐(PHMG),并对PHMG进行双键化获得MAPHMG,通过高效质谱仪(HRMS)和核磁共振氢谱(1 H NMR)验证抗菌剂的合成。将CDMA通过水解缩合反应接枝于棉纤维表面,将PHMG通过水解缩合反应和自由基聚合反应接枝于棉纤维表面,制得两种非溶出型抗菌棉纤维,并通过抑菌率和吸光度值测试证实接枝方法的可行性,分析对比两种抗菌剂对棉纤维进行改性后的抗菌效果。结果发现:两种抗菌剂均具有优良的抗菌效果,尤以PHMG更佳,在MAPHMG添加量为3%时,抗菌棉纤维对金黄色葡萄球菌和大肠埃希菌的抑菌率分别为99.999%和99.996%,且吸光度测试显示PHMG能够更快地发挥抗菌作用。展开更多
文摘A systematic study on the synthesis and antibacterial activity of the quaternary "onium" salts grafted on an insoluble "gel-type" styrene-7% divinylbenzene copolymer by polymer-analogous reactions is showed. Antibacterial activity of quaternary ammonium and/or phosphonium salts grafted on polymer-supports has been studied against Staphylococcus aureus and Escherichia coli. A wide variety of "onium" salts bound to macromolecular supports with different quaternary groups and different quaternary chain length substituents were examined. The antibacterial activity of mixed "onium" salts increases as a consequence of the association of ammonium and phosphonium salts grafted on the same polymeric support.
基金Projects(20676049, 20871058) supported by the National Natural Science Foundation of China Project(05200555) supported by the Natural Science Foundation of Guangdong Province, China Projects(2007B090400105, 2008A010500005) supported by the Foundation of Enterprise-University-Research Institute Cooperation from Guangdong Province and Ministry of Education of China
文摘Na-montruorillonite (Na-MMT) was exchanged with three quaternary atkylphosphonium 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.
文摘考察了一种实验室自制的魔芋葡甘聚糖季铵盐衍生物(KGM-g-DMAE-BC)的合成以及抗菌性能。正交试验优选出的最佳合成条件为:反应温度70℃,单体质量比(mKGM∶mDMAE-BC)1∶5,引发剂用量0.7 mmol/L,反应时间3 h。悬菌定量实验结果表明:KGM-g-DMAE-BC(接枝率为38.5%)对大肠杆菌、金黄色葡萄球菌及白色念珠菌有较强的杀菌作用,在振荡作用15 m in后,平均灭杀率分别为99.99%、94.26%和99.99%。
文摘制备季铵盐类抗菌剂——N,N-二甲基-N-[3-(三甲氧基硅烷基)丙基]十二烷-1-氯化胺(CDMA)和胍盐类抗菌剂——聚六亚甲基胍盐酸盐(PHMG),并对PHMG进行双键化获得MAPHMG,通过高效质谱仪(HRMS)和核磁共振氢谱(1 H NMR)验证抗菌剂的合成。将CDMA通过水解缩合反应接枝于棉纤维表面,将PHMG通过水解缩合反应和自由基聚合反应接枝于棉纤维表面,制得两种非溶出型抗菌棉纤维,并通过抑菌率和吸光度值测试证实接枝方法的可行性,分析对比两种抗菌剂对棉纤维进行改性后的抗菌效果。结果发现:两种抗菌剂均具有优良的抗菌效果,尤以PHMG更佳,在MAPHMG添加量为3%时,抗菌棉纤维对金黄色葡萄球菌和大肠埃希菌的抑菌率分别为99.999%和99.996%,且吸光度测试显示PHMG能够更快地发挥抗菌作用。