کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
638723 | 1456180 | 2007 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Pervaporation and characterization of chitosan membranes cross-linked by 3-aminopropyltriethoxysilane
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Chitosan (CS) was cross-linked with 3-aminopropyl-triethoxysilane (APTEOS) to prepare chitosan-silica hybrid membranes (CSHMs). The CSHMs were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The results show that there are strong hydrogen bond and covalent bonds formed in the CSHMs matrix, the crystallinity of the CSHMs is lower than that of CS, and silica is well distributed in the CSHMs matrix. The CSHMs exhibited a low degree of swelling (DS) in ethanol/water mixture. Both the solubility and diffusion selectivity increase with increasing ethanol content in the range of 55-95Â wt%. The rate of increase in the solubility selectivity is faster than the rate of decrease in the diffusion selectivity with increasing the feed temperature. These caused the permeate ethanol content to decrease with increasing either the feed ethanol content or the feed temperature. Both the permeation flux and water permselectivity increased remarkably with increasing APTEOS content, CSHM-10 containing 10Â wt% APTEOS has the highest separation factor of 597 with a flux of 0.887Â kg/(m2Â h) in PV of 85Â wt% feed ethanol at 323Â K.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 292, Issues 1â2, 5 April 2007, Pages 125-132
Journal: Journal of Membrane Science - Volume 292, Issues 1â2, 5 April 2007, Pages 125-132
نویسندگان
Jian Hua Chen, Qing Lin Liu, Xiu Hua Zhang, Qiu Gen Zhang,