کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4989592 | 1456933 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of free volume and formation mechanisms of polyamide layers on nanofiltration membrane
ترجمه فارسی عنوان
اثر حجم آزاد و مکانیزم های تشکیل لایه های پلی آمید بر غشای نانوفیلتراسیون
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
نانوفیلتراسیون، حجم آزاد، پلی آمید، مکانیزم سازندگی، پلیمریزاسیون اینترفیس
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
چکیده انگلیسی
Amine monomers of different chemical structures and multiple reactive functional groups, namely tris(2-aminoethyl)amine (TAEA), triethylenetetramine (TETA), and 1,3-diaminopropane (DAP) was reacted with acyl chloride monomers such as 1,3,5-benzenetricarbonyl chloride (TMC) and suberoyl chloride (SC) to synthesize polyamide thin film composite membranes through interfacial polymerization. The effect of membrane formation mechanisms on nanofiltration was investigated. A variable monoenergy slow positron beam was used to explore the differences in the free volume diameters of polyamide layers composed of different chemical structure. The results revealed that the polymerization degree, free volume diameter, and selective layer thickness of the polyamide layers were strongly correlated with each other. Specifically, a high polymerization degree induced a small free volume diameter and a thin selective layer. The cross-linked TAEA-TMC polyamide layer exhibited a free volume diameter of 3.9Â Ã
and was the thinnest (168Â nm) among the synthesized membranes, whereas the linear DAP-SC polyamide layer was the thickest (873Â nm) with a free volume diameter of 4.7Â Ã
. Finally, a stability test on the TAEA-TMC/PAN showed a slight fluctuation during the 36Â h filtration, salt rejection maintained stability at around 97% and water flux of 22.3Â LÂ mâ2Â hâ1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 187, 31 October 2017, Pages 443-452
Journal: Separation and Purification Technology - Volume 187, 31 October 2017, Pages 443-452
نویسندگان
Wei-Song Hung, Jui-Han Liang, Rumwald Leo G. Lecaros, Quan-Fu An, Chien-Chieh Hu, Kueir-Rarn Lee, Juin-Yih Lai,