Effect of polymer density on polyethylene hollow fiber membrane formation via thermally induced phase separation
Effect of polymer density on polyethylene hollow fiber membrane formation via thermally induced phase separation
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DOI：
10.1002/app.20461
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发表时间：
2004-07-05
影响因子：
3
通讯作者：
Kubota, N
中科院分区：
文献类型：
--
作者：
Matsuyama, H;Hayashi, K;Kubota, N
以聚乙烯-邻苯二甲酸二异癸酯溶液为原料，采用热致相分离法制备了高密度聚乙烯（HDPE）和低密度聚乙烯（LDPE）中空纤维微孔膜。研究了聚乙烯密度对膜结构和性能的影响。HDPE膜显示出比LDPE膜高约5倍的水渗透性，因为其在膜外表面处具有更大的孔和更高的孔隙率。较大孔的形成是由于初始较大的结构形成的调幅分解和抑制的稀释剂从外膜表面蒸发，由于较高的溶液粘度。(C)2004 Wiley Periodicals，Inc.
Microporous high-density polyethylene (HDPE) and low-density polyethylene (LDPE) hollow fiber membranes were prepared from polyethylene-diisodecyl phthalate solution via thermally induced phase separation. Effect of the polyethylene density on the membrane structure and performance was investigated. The HDPE membrane showed about five times higher water permeability than the LDPE membrane because it had the larger pore and the higher porosity at the outer membrane surface. The formation of the larger pore was owing to both the initial larger structure formed by spinodal decomposition and the suppression of the diluent evaporation from the outer membrane surface due to the higher solution viscosity. (C) 2004 Wiley Periodicals, Inc.