Journal of Industrial and Engineering Chemistry, Vol.58, 229-239, February, 2018
Enhancing the solvent-dendrimer miscibility at the interface and its impact on the thin film composite membrane
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Poly(amidoamine) (PAMAM) based thin film composite (TFC) membranes were prepared via interfacial polymerization with the aid of co-solvent. The addition of acetone promoted miscibility between the hexane and water phases, which enhanced the dissolution of the dendrimer and water into the reaction zone. By adding acetone, the membranes showed enhanced multivalent cation rejection. However, the presence of moisture promotes the hydrolysis of unreacted acyl chloride which lead to pore broadening effect. Pore enlargement was related to the presence of moisture in organic phase which was diffused from aqueous phase due to its affinity toward acetone-hexane solution.
Keywords:Interfacial polymerization;Thin film composite membrane;Co-solvent;Poly(amidoamine);Dendrimer
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