A facile route for fabricating novel polyelectrolyte complex membrane with high pervaporation performance in isopropanol dehydration

作者：Zhao, Qjang; Qian, Jin-Wen^*; An, Quan-Fu; Yang, Qian; Zhang, Peng

来源：Journal of Membrane Science, 2008, 320(1-2): 8-12.

DOI：10.1016/j.memsci.2008.04.040

• polyelectrolyte complex
• membrane
• pervaporation
• isopropanol dehydration

Polyelectrolyte complexes (PECs) of sodium carboxymethyl cellulose (CMCNa) and poly(diallyldimethylammonium chloride) (PDDA) were prepared in dilute hydrochloric acid (HCI) aqueous solution and obtained in its solid form. Element analysis and FT-lR showed that the composition of PECs could effectively be tuned by the concentration of HCI in parent polyelectrolyte solution. The PECs were then dissolved in 0.1 mol/L aqueous NaOH and subsequently cast onto polysulfone ultra-filtration membrane. This composite membrane, which has a unique homogeneous PECs separation layer, was subjected to pervaporation test for the first time and gave a performance of J=3.0 kg/m(2) h, alpha = 960 for 10wt% water-isopropanol feed at 75 degrees C. Meanwhile, performance of the PECs membrane displays good stability and unique dependence on feed temperature. These findings, together with its ultra-high performance, are primarily explained by the structure characteristic of PECs.

• 出版日期2008-7-15
• 单位浙江大学