采用化学法合成了一种壳聚糖/银‐铜(CAC)共混的复合抗菌剂,利用表面官能团链接方式接枝到硅橡胶基体上,制成抗菌硅橡胶高分子材料。通过SEM 、T EM 、XPS 等测试方法对抗菌硅橡胶进行表征分析,采用抑菌环法和震荡烧瓶法表征复合...采用化学法合成了一种壳聚糖/银‐铜(CAC)共混的复合抗菌剂,利用表面官能团链接方式接枝到硅橡胶基体上,制成抗菌硅橡胶高分子材料。通过SEM 、T EM 、XPS 等测试方法对抗菌硅橡胶进行表征分析,采用抑菌环法和震荡烧瓶法表征复合抗菌剂和抗菌材料的抗菌性能。结果表明,C A C复合抗菌剂其细菌存活率对大肠杆菌仅达到18%,对金黄色葡萄球菌为26%,其初始分解温度较CS/Ag溶胶提高了大约70℃,具有良好的抗菌性和热稳定性;制备的抗菌硅橡胶高分子材料方法简单,成本低廉,其抗菌功能层厚度约为50~70μm ,且对大肠杆菌和金黄色葡萄球菌的抗菌率均达到96%以上,抗菌性能优良。展开更多
The structure, properties and application to water-soluble coatings of a new complex antimicrobial agent Ag-carboxylmethyl citosan-thiabendazole (Ag-CMCTS-TBZ) prepared from different materiel ratios were reported. ...The structure, properties and application to water-soluble coatings of a new complex antimicrobial agent Ag-carboxylmethyl citosan-thiabendazole (Ag-CMCTS-TBZ) prepared from different materiel ratios were reported. The silver ions were preferably coordinated with the free-NH2 groups and the -OH groups of secondary alcohol and carboxyl in CMCTS. TBZ preferably bonded to carboxyl group in CMCTS by electrostatic force and hydrogen bonding. Increase in silver ions content in the complex agent improved to some limited extent the antibacterial activity, but enhanced coloring and cost of the complex agent. Increase in TBZ content resulted in increase of antifungal activity, but decrease of water solubility of the complex agent. The antimicrobial MICs of the complex agent to Esherichia coil, Staphylococcus aureus, Candida albicans, Aspergillus niger, Mucor sp. were 20 -80, 15 -60, 20 - 55, 40 - 250, and 400 - 1700 mg/kg, respectively. Addition of 0.1% of this complex agent to acrylic emulsion paint made the paint without substantial change in color, luster, viscosity, odor or pH value, but with an excellent and chronically persisting broad-spectra antimicrobial activity.展开更多
文摘采用化学法合成了一种壳聚糖/银‐铜(CAC)共混的复合抗菌剂,利用表面官能团链接方式接枝到硅橡胶基体上,制成抗菌硅橡胶高分子材料。通过SEM 、T EM 、XPS 等测试方法对抗菌硅橡胶进行表征分析,采用抑菌环法和震荡烧瓶法表征复合抗菌剂和抗菌材料的抗菌性能。结果表明,C A C复合抗菌剂其细菌存活率对大肠杆菌仅达到18%,对金黄色葡萄球菌为26%,其初始分解温度较CS/Ag溶胶提高了大约70℃,具有良好的抗菌性和热稳定性;制备的抗菌硅橡胶高分子材料方法简单,成本低廉,其抗菌功能层厚度约为50~70μm ,且对大肠杆菌和金黄色葡萄球菌的抗菌率均达到96%以上,抗菌性能优良。
文摘The structure, properties and application to water-soluble coatings of a new complex antimicrobial agent Ag-carboxylmethyl citosan-thiabendazole (Ag-CMCTS-TBZ) prepared from different materiel ratios were reported. The silver ions were preferably coordinated with the free-NH2 groups and the -OH groups of secondary alcohol and carboxyl in CMCTS. TBZ preferably bonded to carboxyl group in CMCTS by electrostatic force and hydrogen bonding. Increase in silver ions content in the complex agent improved to some limited extent the antibacterial activity, but enhanced coloring and cost of the complex agent. Increase in TBZ content resulted in increase of antifungal activity, but decrease of water solubility of the complex agent. The antimicrobial MICs of the complex agent to Esherichia coil, Staphylococcus aureus, Candida albicans, Aspergillus niger, Mucor sp. were 20 -80, 15 -60, 20 - 55, 40 - 250, and 400 - 1700 mg/kg, respectively. Addition of 0.1% of this complex agent to acrylic emulsion paint made the paint without substantial change in color, luster, viscosity, odor or pH value, but with an excellent and chronically persisting broad-spectra antimicrobial activity.