کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
635747 1456104 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of iron catalyst on gas transport properties of ion-irradiated asymmetric polyimide membranes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Effects of iron catalyst on gas transport properties of ion-irradiated asymmetric polyimide membranes
چکیده انگلیسی

In this study, we focused on the effects of the carbon structures on the gas permeability and selectivity of the asymmetric polyimide membranes prepared by He+-irradiation using iron (III) acetylacetonate (AAI) as the catalyst. The irradiated asymmetric membranes consisted of a defect-free carbonized ultrathin skin layer and indicated a molecular sieving-like effect due to the surface carbonization similar to carbon molecular membranes. The Raman spectrum of the irradiated membranes included two well-known D (1360 cm−1) and G (1580 cm−1) peaks and two additional new peaks around 1150 and 1500 cm−1. Interestingly, the graphitic and amorphous structures at 1580 and 1500 cm−1 in the membranes increased with an increase in the AAI content. Especially, it was found that the catalyst had a profound effect on the graphitic and amorphous structures of the ion-irradiated membrane. Finally, we concluded that the amorphous structure in the membrane had an influence on the gas permeability and that the graphitic structure formed a barrier to the gas permeability and had an influence on the gas selectivity.


► The novel ion-irradiated membrane was prepared using the catalyst.
► The catalyst had a profound effect on the graphitic and amorphous structures.
► The amorphous structure had an influence on the gas permeability.
► The graphitic structure had an influence on the gas selectivity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 375, Issues 1–2, 15 June 2011, Pages 75–80
نویسندگان
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