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抗菌聚丙烯的性能及影响因素 总被引:1,自引:0,他引:1
选用经表面处理的无机抗菌剂和共聚聚丙烯(PP)及助剂熔融共混制备抗菌PP,研究了抗菌剂在PP中的分散性和抗菌PP的抗菌性能、力学性能及加工性能。结果表明:当抗菌剂质量分数为0.5%时,抗菌PP具有强抗菌性,对大肠杆菌和金黄色葡萄球菌的抗菌率均达到99.0%以上;加入质量分数为1.00%的抗菌剂则具有强抗菌持久性.同时抗菌PP保持良好的力学性能和加工性能。 相似文献
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抗菌建筑卫生陶瓷的试制和展望 总被引:9,自引:0,他引:9
本文介绍了抗菌建筑卫生陶瓷的基本概念和国内外的发展简况;抗菌剂及制品的性能评价;无机抗菌剂型和纳米材料型抗菌建筑卫生陶瓷的试验和检测情况;讨论了发展抗菌建筑卫生陶瓷方面的几个问题并对它的发展前景作了预测和展望。 相似文献
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为满足食品、医疗等领域对于塑料的需求,拓宽塑料包装在全球市场的应用范围,文章具体阐述塑料专业抗菌剂的类型及其对塑料包装抗菌性能的优化作用,同时重点阐述了常见抗菌型塑料的研究进展。综合分析国内外专业抗菌剂和抗菌型塑料在包装行业的研究与发展现状,简单介绍各类抗菌剂的抗菌机理,并分类整理常见抗菌型塑料的制备与研究情况,同时总结不同抗菌型塑料在日常生产生活中的具体应用和发展趋势。抗菌剂能够明显提升塑料包装的抗菌性能,在食品、家具、医疗等行业的应用十分广泛,深入研发各类新型、安全、环保的抗菌型塑料,能够为人们提供更加安全的食品或医疗环境。 相似文献
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抗菌剂在PP基体中的分散相容性明显影响PP抗菌材料的力学性能和抗菌性能。通过力学性能测试、扫描电子显微镜(SEM)测试及抗菌性能测试,考查了载银和载银铜抗菌PP母粒的力学性能、无机抗菌剂在PP基体中分散情况以及抗菌母粒的抗菌性能。结果表明,无机抗菌剂在PP基体中分散均匀,加入无机抗菌剂后PP共混材料的拉伸强度和冲击强度无明显变化。通过抗菌性能测试表明,银离子具有较强的杀菌能力,可以通过缓释技术使其达到长效杀菌的目的。 相似文献
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Antibacterial silver 总被引:5,自引:0,他引:5
The antibacterial activity of silver has long been known and has found a variety of applications because its toxicity to human cells is considerably lower than to bacteria. The most widely documented uses are prophylactic treatment of burns and water disinfection. However, the mechanisms by which silver kills cells are not known. Information on resistance mechanisms is apparently contradictory and even the chemistry of Ag(+) in such systems is poorly understood.Silver binds to many cellular components, with membrane components probably being more important than nucleic acids. It is difficult to know whether strong binding reflects toxicity or detoxification: some sensitive bacterial strains have been reported as accumulating more silver than the corresponding resistant strain, in others the reverse apparently occurs. In several cases resistance has been shown to be plasmid mediated. The plasmids are reported as difficult to transfer, and can also be difficult to maintain, as we too have found. Attempts to find biochemical differences between resistant and sensitive strains have met with limited success: differences are subtle, such as increased cell surface hydrophobicity in a resistant Escherichia coli.Some of the problems are due to defining conditions in which resistance can be observed. Silver(I) has been shown to bind to components of cell culture media, and the presence of chloride is necessary to demonstrate resistance. The form of silver used must also be considered. This is usually water soluble AgNO(3), which readily precipitates as AgCl. The clinically preferred compound is the highly insoluble silver sulfadiazine, which does not cause hypochloraemia in burns. It has been suggested that resistant bacteria are those unable to bind Ag(+) more tightly than does chloride. It may be that certain forms of insoluble silver are taken up by cells, as has been found for nickel. Under our experimental conditions, silver complexed by certain ligands is more cytotoxic than AgNO(3), yet with related ligands is considerably less toxic. There is evidently a subtle interplay of solubility and stability which should reward further investigation. 相似文献
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综述了抗菌塑料抗菌性能的检测方法及其对抗菌材料的评价,并介绍了抗菌塑料制品的应用研究新动向。 相似文献
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多孔载银抗菌剂和灭菌性能评价 总被引:4,自引:2,他引:4
探讨了以多孔SiO2为载体的含银无机抗菌剂的制备工艺和灭菌性能。采用模板法合成小粒度的多孔SiO2粉为原料,或添加粘接剂烧结的成型体,在减压(0.02-0.04MPa)下用5%的硝酸银溶液浸渍0.5-1.0h,于360℃煅烧还原,制得的无机抗菌剂具有20mg.g-1的载银量。样品的抑菌环宽度和灭菌率测试表明该抗菌剂对大肠杆菌和枯草杆菌有良好的抑制生长和灭菌作用,在水中浸泡96h后有99%的灭菌率,重复使用3次后灭菌率可保持在75%。 相似文献
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