The insoluble quaternary ammonium bactericide was synthesized in two steps using silica gel as a carrier. The silica gels first reacted with 3-chloropropyltrimethoxysilane to give an intermediate, the chloropropyl gro...The insoluble quaternary ammonium bactericide was synthesized in two steps using silica gel as a carrier. The silica gels first reacted with 3-chloropropyltrimethoxysilane to give an intermediate, the chloropropyl groups on which then reacted with dimethyl tetradceylamine to give the quaternary ammonium bactericides. The bactericidal rate of the product against heterotrophic bacteria was 99% as tested in vitro.展开更多
将聚乙烯亚胺(PEI)接枝在硅胶上(PEI/SiO2)。先以环氧丙烷叔胺化再以氯化苄季铵化,制备了硅胶接枝的聚乙烯亚铵季铵盐水不溶抗菌材料(QPEI/SiO2)。通过红外光谱对产物的化学结构进行了表征,测定了材料的接枝率为15.7%(15.7 g PEI/100 g ...将聚乙烯亚胺(PEI)接枝在硅胶上(PEI/SiO2)。先以环氧丙烷叔胺化再以氯化苄季铵化,制备了硅胶接枝的聚乙烯亚铵季铵盐水不溶抗菌材料(QPEI/SiO2)。通过红外光谱对产物的化学结构进行了表征,测定了材料的接枝率为15.7%(15.7 g PEI/100 g SiO2),季铵化度最高为1.57 mmol/g。采用平板活菌计数法考察了QPEI/SiO2的季铵化度对大肠杆菌和金黄葡萄球菌的抗菌性能的影响规律;采用β-半乳糖苷酶活性测定法,探索了QPEI/SiO2的抗菌机理。结果表明,QPEI/SiO2抗菌材料具有较强的抗菌能力,当剂量为15 g/L时对浓度为1×109CFU/mL的金黄葡萄球菌液和大肠杆菌菌液的抗菌率分别为100%和接近100%,其抗菌性能随季铵化度的增大而增强。酶活性测定结果表明,QPEI/SiO的抗菌机理主要基于杀菌作用。展开更多
文摘The insoluble quaternary ammonium bactericide was synthesized in two steps using silica gel as a carrier. The silica gels first reacted with 3-chloropropyltrimethoxysilane to give an intermediate, the chloropropyl groups on which then reacted with dimethyl tetradceylamine to give the quaternary ammonium bactericides. The bactericidal rate of the product against heterotrophic bacteria was 99% as tested in vitro.
文摘将聚乙烯亚胺(PEI)接枝在硅胶上(PEI/SiO2)。先以环氧丙烷叔胺化再以氯化苄季铵化,制备了硅胶接枝的聚乙烯亚铵季铵盐水不溶抗菌材料(QPEI/SiO2)。通过红外光谱对产物的化学结构进行了表征,测定了材料的接枝率为15.7%(15.7 g PEI/100 g SiO2),季铵化度最高为1.57 mmol/g。采用平板活菌计数法考察了QPEI/SiO2的季铵化度对大肠杆菌和金黄葡萄球菌的抗菌性能的影响规律;采用β-半乳糖苷酶活性测定法,探索了QPEI/SiO2的抗菌机理。结果表明,QPEI/SiO2抗菌材料具有较强的抗菌能力,当剂量为15 g/L时对浓度为1×109CFU/mL的金黄葡萄球菌液和大肠杆菌菌液的抗菌率分别为100%和接近100%,其抗菌性能随季铵化度的增大而增强。酶活性测定结果表明,QPEI/SiO的抗菌机理主要基于杀菌作用。