Effect of molecular weight of ethylene—vinyl alcohol copolymer on membrane properties
Effect of molecular weight of ethylene—vinyl alcohol copolymer on membrane properties
复制标题
乙烯-乙烯醇共聚物分子量对膜性能的影响
DOI：
10.1016/s0376-7388(00)85120-0
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发表时间：
1981
期刊：
影响因子：
--
通讯作者：
S. Horie
中科院分区：
文献类型：
--
作者：
Tsunetaka Matsumoto;K. Nakamae;T. Ochiumi;S. Horie
研究了聚合物相对分子质量对乙烯-乙烯醇共聚物（伊娃）膜结构和功能的影响。膜由三种不同类型的未分馏的和七种类型的分馏的伊娃样品制备。测定了伊娃膜的组成和分子量，沿着水通量、孔径和拉伸强度。借助扫描电子显微镜观察了微观结构。发现膜的水通量取决于共聚物的分子量而不是共聚物的组成。由高分子量伊娃制备的膜具有小的孔并且表现出低的水通量，而由低分子量伊娃制备的那些膜也具有小的孔但是由于较高的孔密度而表现出较高的水通量。从膜的微观结构角度探讨了成膜和水渗透的机理。
The effect of polymer molecular weight on the structure and function of ethylene—vinyl alcohol (EVA) copolymer membranes was investigated. Membranes were prepared from three different types of unfractionated and seven types of fractionated EVA samples. The composition and molecular weight of the EVA membranes were measured, along with the water flux, pore size, and tensile strength. The microstructure was observed with the aid of a scanning electron microscope. p]The water flux of the membranes was found to depend on the molecular weight rather than on the composition of the copolymer. Membranes prepared from high molecular weight EVA had small pores and exhibited low water fluxes, while those prepared from low molecular weight EVA also had small pores but exhibited higher water fluxes, due to a higher pore density. The mechanism of membrane formation and water permeation are discussed from the point of view of membrane microstructure.