Aromatic polyamide-hydrazides for water desalination II-RO membrane performance of terpolymers

✍ Scribed by M.D. Satre; N.D. Ghatge

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 756 KB
• Volume: 91
• Category: Article
• ISSN: 0011-9164
• DOI: 10.1016/0011-9164(93)80051-n

✦ Synopsis

Aromatic polyamide-hydrazide (PAH) terpolymers were prepared from reactions of 3-amino benzhydrazide (MABH) and/or 4-amino benzhydrazide (PABH) with isophthaloyl chloride (ICl) and/or terephthaloyl chloride (TCl) in N,N-dimethyl acetamide (DMAc) by low temperature polycondensations. Membranes were cast from solutions of terpolymer and lithium chloride in DMAc. The casting parameters were varied to alter the porosities. The reverse osmosis (RO) membrane performances were evaluated using aqueous sodium chloride feeds of differing concentrations at different operating pressures. Chemical composition of the tcrpolymer, various membrane processing variables and testing conditions were found to dictate the desalination efficiency of the RO membranes.