کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1733027 1521491 2013 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and characterization of proton exchange membranes based on semi-interpenetrating sulfonated poly(imide-siloxane)/epoxy polymer networks
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
پیش نمایش صفحه اول مقاله
Preparation and characterization of proton exchange membranes based on semi-interpenetrating sulfonated poly(imide-siloxane)/epoxy polymer networks
چکیده انگلیسی


• Preparing semi-IPN (interpenetrating polymer network) membranes based on SPISX–EP (sulfonated polyimide-siloxane and epoxy) polymers.
• New SPISX–EP membranes were highly transparent, mechanically strong, thermally stable and greater hydrolytic stability.
• The SPISX–EP membranes can be exhibited proton conductivities closed to those of Nafion® 117 at 80 °C.
• SPISX membranes suggest their potential application as proton-conducting membranes in fuel cells.

We prepared and characterized a series of semi-IPN (semi-interpenetrating polymer network) membranes based on SPISX–EP (sulfonated polyimide-siloxane and epoxy) polymers and compared their properties with those of a pure SPISX membrane and a commercially available proton exchange membrane. Overall, the SPISX5–EP (with 5 wt% PDMS (α,ω-diaminopropyl polydimethylsiloxane) in SPISX) membranes can be exhibited desirable mechanical properties and thermal stabilities, with proton conductivities superior to those of Nafion® 117 at 80 °C. The dimensional changes of the membranes and degrees of methanol transport decreased with increasing epoxy content; here, the effect of crosslinking had a greater effect than did the increased number of ionic exchange sites. The proton conductivities and methanol permeabilities of the membranes ranged from 10−3 to 10−2 S/cm and from 10−9 to 10−7 cm2/s, respectively, in the temperature range 25–90 °C. Transmission electron microscopy images indicated that the presence of large, well-connected hydrophilic domains was responsible for the large hydrolytic stability of the SPISX5–EP membranes; infrared spectroscopy confirmed these results. SPISX5–EP membranes featuring epoxy compositions of 30 and 40% exhibited greater hydrolytic stability relative to the corresponding SPISX membranes, suggesting their potential application as proton-conducting membranes in fuel cells.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 55, 15 June 2013, Pages 905–915
نویسندگان
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