کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5183301 1381014 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and properties of pore-filling membranes based on sulfonated copolyimides and porous polyimide matrix
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Preparation and properties of pore-filling membranes based on sulfonated copolyimides and porous polyimide matrix
چکیده انگلیسی

The porous polyimide films were prepared by a wet phase inversion process. The influence of coagulating non-solvent on morphology, pore size and porosity of porous films was investigated. A series of pore-filling sulfonated polyimide (PFSPI) membranes, which derived from a homogenous spongy-like porous polyimide film as matrix filled with sulfonated copolyimides, were prepared and characterized. These PFSPI membranes exhibited excellent thermal stability with desulfonation temperature of 283-330 °C and good oxidative stability in Fenton's agent due to the protective effect of porous polyimide matrix on the sulfonic acid groups. The swelling of PFSPI membranes could be effectively suppressed by the porous matrix, which leads to the excellent dimensional stability and good water stability of membranes. The PFSPI membranes exhibited high proton conductivity at elevated temperature. All the PFSPI membranes displayed better permselectivity as compared with Nafion 115, which is attributed to their much lower methanol permeability.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 53, Issue 15, 6 July 2012, Pages 3154-3162
نویسندگان
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