کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
636527 1456128 2010 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Inorganic modification of block copolymer for medium temperature proton exchange membrane application
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Inorganic modification of block copolymer for medium temperature proton exchange membrane application
چکیده انگلیسی
New hybrid membranes have been developed via sol-gel chemistry and solvent directed infiltration method using novel inorganic precursors and sulfonated poly(styrene-b-[ethylene-co-butylene]-b-styrene) (S-SEBS). S-SEBS shows a distinct phase separated morphology which can be used as a structure directing template to drive the inorganic component within the ionic domains of the polymer. Photoacoustic Fourier transform infrared spectroscopy (PA-FTIR) confirms the formation of Si-O-Si and Si-O-P bridges in hybrid membranes which indicate a silicate or phosphosilicate network structure within the hybrid membranes. The presence of the inorganic network within the hybrid membranes improves their thermal stability, viscoelastic properties and water retention at elevated temperatures above 100 °C. Scanning electron microscopy (SEM) results show a uniform distribution of the inorganic component within the hybrid membranes and confirm successful incorporation of inorganic particles within S-SEBS membranes. Conductivity of S-SEBS starts to decrease after 60 °C due to excessive swelling whereas hybrid membranes show an increase in conductivity after 60 °C as the inorganic component reduces excessive swelling in hybrid membranes. SAXS results indicate that S-SEBS has distinct phase separated morphology and show hybrid membranes exhibit a lamellar morphology.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 351, Issues 1–2, 1 April 2010, Pages 168-177
نویسندگان
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