کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
637559 883688 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructured proton-conducting membranes by synchrotron-radiation-induced grafting
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Microstructured proton-conducting membranes by synchrotron-radiation-induced grafting
چکیده انگلیسی

Selective exposures of poly(ethylene-alt-tetrafluoroethylene) (ETFE) films with hard X-rays through high aspect ratio Ni-masks were performed at the LIGA3 beamline of the “Angström Quelle Karlsruhe” (ANKA) to create patterns of radicals used as initiators for the grafting of styrene into the bulk of the ETFE films. Grafted films were then sulfonated to obtain proton-conducting membranes. The structure definition, as investigated by scanning electron microscopy (SEM), showed a perfect discrimination between exposed and shaded areas through all the film thickness. Structuring results in a more homogeneous appearance of the membrane without affecting the degree of grafting and proton conductivity in the grafted areas. In fuel cell tests the structured membranes showed slightly lower performance due to 10% lower active area, but had a significantly higher lifetime.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 325, Issue 2, 1 December 2008, Pages 658–664
نویسندگان
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