کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7007608 | 1455250 | 2018 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
An ultrathin, porous and in-air hydrophilic/underwater oleophobic coating simultaneously increasing the flux and antifouling property of membrane for membrane distillation
ترجمه فارسی عنوان
یک پوشش آلوفوبی هیدروفیلی / زیر آب و آلومینیومی فوق العاده، متخلخل و درون هوا به طور همزمان باعث افزایش شار و ویژگی ضد غلظت غشاء برای تقطیر غشاء
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کلمات کلیدی
اصلاح سطح، دوپامین، پوشش تقطیر غشایی، ریزش مو،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
چکیده انگلیسی
Surface modification is a useful method to enhance the antifouling ability of membranes for membrane distillation (MD). However, current surface modification strategies often tend to sacrifice the membrane flux. In this work, we decorated a commercial hydrophobic polytetrafluoroethylene (PTFE) membrane by coating dopamine (DA) alone. A unique surface coating being ultrathin, porous, and in-air hydrophilic/underwater oleophobic was constructed, which simultaneously increased the flux and fouling resistance of the PTFE membrane in MD desalination. When treating a 3.5â¯wt% NaCl aqueous solution at 70â¯Â°C through vacuum MD (VMD), compared with the pristine PTFE membrane flux of 28.8â¯kg/m2·h, the flux of the modified membrane 0.5DA@PTFE-4 reached 89.6â¯kg/m2·h, and the flux increased by 210%. Continuous VMD operations demonstrated that the 0.5DA@PTFE-4 membrane held a higher resistance to scaling than the pristine one. Moreover, the pristine PTFE membrane was incompetent to tackle an oily saline via VMD, showing an immediate membrane fouling and wetting. The 0.5DA@PTFE-4 membrane, however, exhibited a significant improvement in oil fouling resistance, rendering the VMD desalination process viable for more than 30â¯h. The findings in this work provided a new insight to develop the robust membrane with high performance used for MD.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 445, 1 November 2018, Pages 40-50
Journal: Desalination - Volume 445, 1 November 2018, Pages 40-50
نویسندگان
Weishi Sun, Fei Shen, Zhaoshuai Wang, Yan Zhang, Yinhua Wan,