摘要:
Silica nanopowders with biocidal properties, especially for polymer composites, are produced by sol-gel method. The silica sol is produced from the aqueous mixture containing tetraalkoxysilane, in which alkoxy group contains from C 1 to C 4 carbon atoms, an alcohol or the mixture of aliphatic alcohols from C 1 to C 4 , in the mole ratio of 1 : 5 to 1 : 35, in the presence of ammonium compound, used in an amount of from 0.001 to 0.05 mol per 1 mol of tetraalkoxysilane, with introducing, after thorough mixing of components, the silver salt in the form of aqueous solution in an amount from 0.02 to 1 mol per 1 mol of tetraalkoxysilane, and subsequently the aqueous solution of alkali metal hydroxide in an amount from 0.02 to 1 mol of hydroxide per 1 mol of tetraalkoxysilane. Silica nanopowders of the particle size of below 200 nm, contain silver nano- particles immobilized on silica, with stable physicochemical and biocidal properties.
摘要:
Method of manufacturing the silica nanopowders with fungicidal properties, consists in that the silica gel is obtained by sol-gel method from the reaction mixture containing tetraalkoxysilane and aliphatic alcohol, in the presence of ammonium compound, and thereafter the thermodegradable copper (ll) salt a compound from the group of carbofunctional alkoxysilanes, and then, after evaporation of solvents the dry residue is heated at the decomposition temperature of copper (II) salt.
摘要翻译:制造具有杀真菌性质的二氧化硅纳米粉末的方法,besteht DASS DER硅胶是通过溶胶 - 凝胶法从含有四烷氧基硅烷和脂族醇的反应混合物中获得,在铵化合物的存在下,并且之后thermodegradable铜(II)盐 选自羰官能的烷氧基的化合物,然后,干燥的残留物在铜(II)盐的分解温度下加热蒸发溶剂后。