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以磷酸银制备抗菌陶瓷的实验研究 总被引:3,自引:0,他引:3
将无机抗菌剂引入陶瓷釉中,研制了抗菌陶瓷。对其产品性能及抗菌效果进行检测。结果表明不但具有较强的抗菌性能,而且主要物化性能均达国标;同时分析和讨论了抗菌机理,得出抗菌剂的加入量与烧成制度对抗菌陶瓷的抗菌效果影响不大,而主要影响其抗菌持久性。 相似文献
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对近年来国内外广泛研究的两大类抗菌陶瓷的抗菌机理、研究现状及发展趋势进行了详尽的论述,同时揭示了每一类抗菌陶瓷自身存在的优势和劣势,表明了抗菌陶瓷未来发展的方向,提出了抗菌陶瓷在未来发展过程中应着重解决的关键技术问题. 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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全新的抗菌陶瓷生产技术 总被引:1,自引:0,他引:1
伴随科技进步和人民生活水平的提高,改善生存环境、提高生存质量、珍爱身体健康的要求日益增长,开发和生产具有抗菌功能的建筑陶瓷、日用陶瓷等就是在这种件下发展起来的,据报导美国早在八十年代初便投入2.4亿美元开展特种陶瓷研究,德国也从八十年代起设入上亿马克进行开发研究,日本1981年设入130亿日元进行特种陶瓷开发,并于九十年代初生产出抗菌陶瓷产品,1995年推向市场,1998年仅东陶一家生产的抗菌资砖就达54万m^2。我国近一两年来也有少数试验生产抗菌卫生陶瓷的厂家。总之,各国都在组织力量,加大投入试验生产具有抗菌功能的内外墙瓷砖、地砖、坐便器、洗面盆、浴缸及各式餐饮具。 相似文献
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吸水性强抗菌陶瓷制品的特点是吸水性强又能抗菌,吸水功能主要由硅藻土实现,抗菌功能由纳米二氧化钛银离子溶液实现。本文介绍了一种吸水性强的抗菌陶瓷的制备方法与技术原理。经过多次试制与检测,得到制备吸水性强抗菌陶瓷的最佳配方(wt%)为:硅藻土50、粘土18、氧化钙20、氧化铝12。利用此配方制备的样品吸水量达到40%,破坏强度达到1600 N,断裂模数达到2.96 MPa。 相似文献
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本文简单阐述了在研究抗菌陶瓷过程中所使用抗菌剂的种类、抗菌机理、国内外抗菌陶瓷的使用现状,以及目前抗菌陶瓷发展中存在的问题及解决办法,并对新型银系抗菌复合陶瓷的发展进行了展望。 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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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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