Symmetrical Permeable Membranes Consisting of Overlapped Block Copolymer Cylindrical Micelles for Nanoparticle Size Fractionation
Symmetrical Permeable Membranes Consisting of Overlapped Block Copolymer Cylindrical Micelles for Nanoparticle Size Fractionation
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用于纳米粒度分级的由重叠嵌段共聚物圆柱形胶束组成的对称渗透膜
DOI：
10.1021/acs.macromol.6b00166
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发表时间：
2016
期刊：
影响因子：
5.5
通讯作者：
Zhu Li-Ping
中科院分区：
文献类型：
--
作者：
Yi Zhuan;Zhang Pei-Bin;Liu Cui-Jing;Zhu Li-Ping
以聚苯乙烯-嵌段-聚（4-乙烯基吡啶）（PS-b-P4 VP）二嵌段共聚物为原料，通过自组装和非溶剂诱导相分离（SNIPS）相结合的方法制备了由均匀的圆柱形胶束组成的自支撑对称多孔膜。所制备的膜在整个膜剖面（约65 μm）上呈现出明显的柱状胶束重叠的超微结构。考察了共聚物分子量和成膜条件对膜形态的影响。结果表明，以低分子量的PS-b-P4 VP为原料，在较宽的制备条件下可制得圆柱形胶束膜。渗透实验表明，在中性条件下，对称膜的透水性可达400 L/（h m2 bar），与文献报道的嵌段共聚物（BCP）均孔膜相当。值得注意的是，Permea...
Free-standing symmetrical porous membranes consisting of uniform cylindrical micelles were prepared from a polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) diblock copolymer following a process combining self-assembly and nonsolvent-induced phase separation (SNIPS). The fabricated membranes displayed an impressive ultrastructure by the overlapping of the cylindrical micelles throughout the whole membrane profile (∼65 μm). The effects of copolymer molecular weight and membrane-formation condition on membrane morphology were investigated and discussed in detail. It was concluded that the cylindrical micellar membranes could be obtained in a wide window of fabrication conditions as low molecular weight of PS-b-P4VP was used as the raw material. The permeation tests indicated that the water permeability of the symmetrical membranes reached 400 L/(h m2 bar) in neutral condition, which was comparable to that of the block copolymer (BCP) isoporous membrane reported in the literature. Significantly, the permea...