Title of article :
Preparation and pervaporation characteristics of novel polyelectrolyte complex membranes containing dual anionic groups
Author/Authors :
Xue-San Wang، نويسنده , , Quan-Fu An، نويسنده , , Qiang Zhao، نويسنده , , Kueir-Rarn Lee، نويسنده , , Jin-Wen Qian، نويسنده , , Cong-Jie Gao، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Pages :
8
From page :
145
To page :
152
Abstract :
Novel polyelectrolyte complexes (PECs) based on dual anionic group copolymers were prepared and their homogeneous membranes were subjected to pervaporation dehydration of acidic feed. Dual anionic copolymers containing weakly charged acid groups (COO−) and strongly charged acid groups (SO3−), poly(sodium acrylate-co-sodium sytyrenesulfonate) (P(AANa-co-SSNa)), with different compositions were synthesized by radical solution polymerization. SPECs (PECs containing SO3 groups) consisted of negatively charged P(AANa-co-SSNa) and positively charged chitosan (CS) and their homogeneous SPEC membranes (SPECMs) with tunable compositions were prepared. Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) were used to characterize the structure and composition of P(AANa-co-SSNa) and its SPECs. Field emission scanning electron microscopy (FESEM) and contact angle (CA) were used to survey surface properties of SPECMs. Effects of pH values and temperatures of feed mixtures on the swelling behavior and pervaporation dehydration performance of SPECMs were examined. It is found that SPECMs containing SO3 groups are resistant of acidic feed and display very good pervaporation performance even for the low pH feed. For instance, the water concentration in permeate for SPECM−0.30 reaches as high as 99.4 wt%, which is much higher than 60 wt% for PECM for water–isopropanol mixture with pH 1.2, and also maintains operation stability. The SPECMs could find considerable potential application to pervaporation dehydration of acidic feed.
Keywords :
Dual anionic copolymer , Polyelectrolyte complex , Homogenous membrane , Pervaporation
Journal title :
Journal of Membrane Science
Serial Year :
2012
Journal title :
Journal of Membrane Science
Record number :
1357792
Link To Document :
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