AROMATIC POLYAMIDE HYDRAZIDES FOR WATER DESALINATION .1. SYNTHESES AND RO MEMBRANE PERFORMANCE

被引:26
作者
SATRE, MD [1 ]
GHATGE, ND [1 ]
RAMANI, MPS [1 ]
机构
[1] BHABHA ATOM RES CTR,DIV DESALINAT,BOMBAY 400085,INDIA
关键词
D O I
10.1002/app.1990.070410319
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Wholly aromatic polyamide–hydrazides (PAH) were synthesized by low‐temperature solution polycondensation of m‐amino benzhydrazide (MABH)/p‐amino benzhydrazide (PABH) with isophthaloyl chloride (ICL)/terephthaloylchloride (TCl) in N,N‐dimethyl acetamide (DMAC)/N‐methyl‐2‐pyrrolidone (NMP). The polymers were characterized for their properties. Membranes were prepared from these (PAH) polymers under different casting conditions by varying the casting solution composition, evaporation time, post‐annealing treatment, etc. The reverse osmosis (RO) tests for these membranes were performed with 5000 ppm aqueous sodium chloride feeds at 40 and 70 kg/cm2 operating pressures. Addition of lithium chloride to casting solutions and annealing in hot water conferred optimum selectivity to RO membranes. Membranes showed rejections up to 98.5% at flux > 20 cm/day. Copyright © 1990 John Wiley & Sons, Inc.
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页码:697 / 712
页数:16
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