کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
632736 1456004 2015 54 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparison of integrally asymmetric and thin film composite structures for a desirable fashion of forward osmosis membranes
ترجمه فارسی عنوان
مقایسه ساختارهای کامپوزیتی یکپارچه نامتقارن و نازک برای یک روش مطلوب غشاهای اسمز معکوس
کلمات کلیدی
اسمز معکوس غشاء نامتقارن یکپارچه، غشای کامپوزیت فیلم نازک، ضخامت غشاء، پارامتر ساختار غشاء،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
چکیده انگلیسی
This study systematically investigated the structure and performance of integrally asymmetric and thin film composite (TFC) FO membranes to gain a better understanding of the FO transport mechanism, and to suggest appropriate characteristics of FO membranes. The effect of structure parameters (S) on the performance of the membranes was also examined. Under various operating conditions, TFC membranes yielded superior Jw than integrally asymmetric CTA-based membranes, especially, with larger Jw leading to higher solute resistance at alkaline feed and draw solutions. However, the integrally asymmetric membranes possessed smoother surfaces, resulting in lower fouling propensity than the polyamide TFC membranes. Besides the structure, chemical composition of the skin layer also affected the performance. TFC membranes from Toray Chemical Korea (TCK) showed lower oxygen atomic content on the active layer (AL), higher negatively charged AL and higher fouling propensity compared to the TFC HTI membrane. The TCK membrane with a woven substrate served as a promising membrane, with 2.25 times higher Jw and 1.48 times less Js/Jw than the TFC HTI membrane. This study showed that a preparation of FO membranes with both enhanced antifouling resistance and TCK membrane-like open and thin structure are required to develop FO membranes with desirable characteristics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 495, 1 December 2015, Pages 457-470
نویسندگان
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