کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1398224 984346 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of room temperature ionic liquids based random copolyimides for gas separation applications
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Synthesis of room temperature ionic liquids based random copolyimides for gas separation applications
چکیده انگلیسی

Random copolyimides were synthesized using diamino functional room temperature ionic liquid (RTIL) and were characterized. Specifically, a diamino functional RTIL, 1,12-di[3-(3-aminopropyl) imidazolium] dodecane bis[(trifluoromethyl)sulfonyl] imide ([C12(DAPIM)2][Tf2N]2), was reacted with 2,2-bis(3,4-carboxylyphenyl) hexafluoropropane dianhydride (6FDA) and m-phenylenediamine (MDA) to form random cooplyimides with a [C12(DAPIM)2][NTf2]2 concentration varying from 10 to 30 mol%. Incorporation of [C12(DAPIM)2][NTf2]2 within the 6FDA–MDA backbone resulted in decreases in the polymer thermal stability, glass transition temperature, d-spacing, fractional free volume and increments in density. The gas permeability, solubility and diffusivity of the random copolyimides decreased and the permeability selectivities increased compared with the pure 6FDA–MDA polyimide.

Figure optionsDownload as PowerPoint slideHighlights
► Synthesized 6FDA–(MDA/RTIL) random copolyimides.
► Tested gas transport properties of all copolyimides.
► Gas sorption isotherms were monitored.
► Adding RTILs increased selectivity but decreased permeability.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Polymer Journal - Volume 49, Issue 2, February 2013, Pages 482–491
نویسندگان
, ,