کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
636072 | 1456118 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of the aminothiol structure on pervaporation dehydration of poly(thiol ester amide) composite membranes
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study, poly(thiol ester amide) composite membranes were prepared via interfacial polymerization by reacting trimesoyl chloride (TMC) with 4-aminobenzenethiol (ABTH) or 2-aminoethanethiol (AETH) on the surface of a modified polyacrylonitrile (mPAN) membrane (ABTH-TMC/mPAN and AETH-TMC/mPAN). Pervaporation separation of an aqueous ethanol solution with poly(thiol ester amide) composite membranes was investigated as a function of aminothiol structure. To correlate variations in the free volume of poly(thiol ester amide) active layers with pervaporation performance, positron annihilation spectroscopy (PAS) experiments were performed with a variable mono-energy slow positron beam. The affinity of the poly(thiol ester amide) active layer for an aqueous ethanol solution increased upon introduction of a phenyl ring onto the poly(thiol ester amide) backbone. The active layer of AETH-TMC/mPAN composite membranes was thicker and possessed smaller pores (Ï3) and a lower concentration (I3) of free volume than the active layer of ABTH-TMC/mPAN composite membranes did. Solution effects dominated the separation behavior of hydrated ethanol in all poly(thiol ester amide) composite membranes. Furthermore, ABTH-TMC/mPAN composite membranes possessed a higher permeation rate than AETH-TMC/mPAN membranes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 361, Issues 1â2, 30 September 2010, Pages 206-212
Journal: Journal of Membrane Science - Volume 361, Issues 1â2, 30 September 2010, Pages 206-212
نویسندگان
Cheng-Lee Lai, Shu-Hsien Huang, Wei-Li Lin, Chi-Lan Li, Kueir-Rarn Lee,