کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
634430 1456067 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermo-responsive polyacrylonitrile membranes prepared with poly(acrylonitrile-g-isopropylacrylamide) as an additive
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Thermo-responsive polyacrylonitrile membranes prepared with poly(acrylonitrile-g-isopropylacrylamide) as an additive
چکیده انگلیسی

Thermo-responsive polyacrylonitrile (PAN) membranes were prepared by the immersion precipitation phase inversion process using poly(acrylonitrile-graft-isopropylacrylamide) [P(AN-g-NIPAAm)] as an additive. This additive was synthesized by a facile approach based on the combination of reversible addition–fragmentation chain transfer and thiol-ene click chemistry followed by radical copolymerization. The graft copolymer was characterized by Fourier transform infrared spectroscopy and proton nuclear magnetic resonance. Its side chains thermo-responsibility was determined by ultraviolet analysis and water contact angle measurement. Effects of P(AN-g-NIPAAm) addition on the morphologies of PAN membranes were investigated by scanning electron microscope. X-ray photoelectron spectroscopy was conducted at different take-off angles to elucidate the surface segregation of the amphiphilic graft copolymer in the prepared membranes. Results show that the hydrophilic PNIPAAm chains greatly segregate at the membrane surface, which endows these PAN membranes with obvious thermo-responsibility for water permeation.


► A facile method is described for the preparation of thermo-responsive membranes.
► Poly(acrylonitrile-graft-isopropylacrylamide) was synthesized by a one-pot approach.
► Hydrophilic PNIPAAm side chains are greatly enriched at the membrane surfaces.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 432, 1 April 2013, Pages 42–49
نویسندگان
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