کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
636755 | 1456134 | 2009 | 7 صفحه PDF | دانلود رایگان |
In this study, a simplified method to prepare pH-sensitive polyethersulfone (PES) hollow fiber membranes was provided by blending with a copolymer of acrylonitrile and acrylic acid (PANAA). The copolymer PANAA was synthesized by free radical solution polymerization using N-methyl pyrrolidone (NMP) as the solvent. The PANAA copolymer solution can be directly blended with PES solution (using NMP as the solvent) to prepare hollow fibers by using a dry–wet spinning technique based on the liquid–liquid phase separation technique. The blended PES hollow fiber membranes showed evident pH-sensitivity and pH reversibility; and the pH-valve effect was observed at the pH between 4.5 and 11.0. We also proved that the electroviscous effects played the most important role on the pH-sensitivity and flux control for the blended membranes.
Journal: Journal of Membrane Science - Volume 344, Issues 1–2, 15 November 2009, Pages 297–303