The ferric sulfate modified PVA UF membranes, PVA-CA ( cellulose acetate) blend UF membrane and the metal chloride modified PVA-CA blend UF membrane were prepared for the first time by phase inversion. 在用相转化法制备了PVA-CA共混超滤膜基础上,进一步考察了添加碱金属和碱土金属氯化物盐对共混膜性能的影响,并制备了碱金属和碱土金属氯化物改性的PVA-CA共混超滤膜。
In ferric ion reducing power system, reducing power of ethyl acetate and chloroform extracts with increasing concentrations increased faster than others. 在铁离子还原力的体系中,随着浓度的增高,乙酸乙酯和氯仿相提取部位的还原力比其它相增大的更快。