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首页> 外文期刊>Journal of Applied Polymer Science >Cellulose acetate-poly(ether sulfone) blend ultrafiltration membranes. II. Application studies
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Cellulose acetate-poly(ether sulfone) blend ultrafiltration membranes. II. Application studies

机译：醋酸纤维素-聚（醚砜）共混超滤膜。二。应用研究

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摘要

Ultrafiltration membranes are largely applied as macromolecular solutes and heavy-metal-ion separation from aqueous streams. Cellulose acetate and poly(ether sulfone) blend ultrafiltration membranes were prepared by the precipitation phase-inversion technique in 100/0, 95/5, 85/15, and 75/25% polymer blend compositions in the absence and presence of a polymeric additive, poly(ethylene glycol) 600, at different additive concentrations and were used for the rejection of proteins trypsin, pepsin, egg albumin, and bovine serum albumin; a maximum of 94% rejection was achieved. The toxic heavy metal ions copper, nickel, and cadmium from dilute aqueous solutions were subjected to rejection by the blend membranes by complexation of the ions with the water-soluble polymeric ligand, polyethyleneimine (PEI). Permeate flux studies of proteins and metal ions were performed simultaneously with the rejection experiments. The atomic absorption spectra results reveal maximum rejection for copper complex and a minimum rejection of about 60% for the cadmium complex. The rejection and permeate flux of the blend membranes were compared with those of pure cellulose acetate membranes. (C) 2004 Wiley Periodicals, Inc.
机译：超滤膜主要用作高分子溶质和从水流中分离重金属离子。在不存在和存在聚合物添加剂的情况下，通过沉淀相转化技术在100 / 0、95 / 5、85 / 15和75/25％聚合物共混物组合物中制备醋酸纤维素和聚（醚砜）共混物超滤膜。 ，聚（乙二醇）600，在不同的添加剂浓度下用于排斥胰蛋白酶，胃蛋白酶，卵清蛋白和牛血清白蛋白。最高达到94％的拒绝率。通过使离子与水溶性聚合物配体聚乙烯亚胺（PEI）络合，使稀水溶液中的有毒重金属离子铜，镍和镉受到掺混膜的排斥。蛋白质和金属离子的渗透通量研究与排斥实验同时进行。原子吸收光谱结果表明，铜配合物的最大排斥率和镉配合物的最小排斥率约为60％。将共混膜的截留率和渗透通量与纯乙酸纤维素膜的截留率和渗透通量进行了比较。 （C）2004年Wiley Periodicals，Inc.

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