Abstract
The permeation and chlorine tolerance of various thin-film composite poly(esteramide) membranes were investigated. The membranes were synthesized interfacially by reacting trimesoyl chloride with an aqueous phase containing m-phenylene diamine plus either m-aminophenol ( m-AP), bisphenol-A (Bis-A) or hydroquinone (HQ). The amount of ester groups actually incorporated in the membranes at various starting stoichiometric ratios was quantified. Membranes incorporating Bis-A or HQ gave complete sucrose rejection while the salt rejections decreased in the order: HQ > m-AP > Bis-A based systems. The HQ: m-PDA system showed permeation characteristics approaching those of polyamide membranes synthesized from m-PDA alone. The membrane chlorine tolerance was significantly increased by the incorporation of ester linkages.
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