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首页> 外文期刊>Journal of Applied Polymer Science >Tailoring of structures and permeation properties of asymmetric nanocomposite cellulose acetate/silver membranes
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Tailoring of structures and permeation properties of asymmetric nanocomposite cellulose acetate/silver membranes

机译：不对称纳米复合醋酸纤维素/银膜的结构和渗透性能的定制

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Cellulose acetate (CA)-silver (Ag) nanocomposite asymmetric membranes were prepared via the wet-phase inversion method by dispersing polyvinylpirrolydone-protected Ag nanoparticles in the membrane casting solutions of different compositions. Silver nanoparticles were synthesized ex situ and added to the casting solution as a concentrated aqueous colloidal dispersion. The effects of the dispersion addition on the structure and on the selective permeation properties of the membranes were studied by comparing the nanocomposites with the silver-free materials. The casting solution composition played an important role in the adequate dispersion of the silver nanoparticles in the membrane. Incorporation of nanoscale silver and the final silver content resulted in structural changes leading to an increase in the hydraulic permeability and molecular weight cut-off of the nanocomposite membranes. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41796.
机译：通过湿相转化法，将聚乙烯吡咯烷酮保护的Ag纳米粒子分散在不同组成的铸膜溶液中，制备了醋酸纤维素（CA）-银（Ag）纳米复合不对称膜。银纳米颗粒是非原位合成的，并以浓缩的胶体水分散体形式添加到流延溶液中。通过比较纳米复合材料与无银材料，研究了分散体添加量对膜的结构和选择性渗透性能的影响。流延溶液组合物在银纳米颗粒在膜中的充分分散中起重要作用。纳米级银和最终银含量的结合导致结构变化，导致纳米复合膜的水渗透性和分子量截留值增加。 （c）2014 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，41796。

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