کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7789392 | 1500638 | 2015 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Pervaporative dehydration characteristics of an ethanol/water azeotrope through various chitosan membranes
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The permeation and separation characteristics of an ethanol/water azeotrope through chitosan membranes of different molecular weights and degrees of deacetylation during pervaporation were investigated. The normalized permeation rate decreased with increasing molecular weight up to 90Â kDa, but at over 90Â kDa, the rate increased. On the other hand, the water/ethanol selectivity increased with increasing molecular weight up to 90Â kDa but decreased at over 90Â kDa. With increasing degree of deacetylation, the water/ethanol permselectivity increased significantly, but the normalized permeation rate decreased. The characteristics of chitosan membranes are discussed based on their chemical and physical structures such as the contact angle, density, degree of swelling, and glass transition temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 120, 20 April 2015, Pages 1-6
Journal: Carbohydrate Polymers - Volume 120, 20 April 2015, Pages 1-6
نویسندگان
Tadashi Uragami, Tomoyuki Saito, Takashi Miyata,