کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7021265 | 1456007 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A novel type of polyelectrolyte complex/MWCNT hybrid nanofiltration membranes for water softening
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A novel type of polyelectrolyte complex/MWCNT hybrid nanofiltration membranes for water softening A novel type of polyelectrolyte complex/MWCNT hybrid nanofiltration membranes for water softening](/preview/png/7021265.png)
چکیده انگلیسی
A novel type of polyelectrolyte complex (PEC)/multi-walled carbon nanotube (MWCNT) hybrid nanofiltration (NF) membranes were prepared via in-situ ionic cross-linking between sodium alginate (SA), polyethyleneimine (PEI), and MWCNTs. Chemical structures and compositions of PECs and MWCNT hybrid PECs (HPECs) were characterized by Fourier transform infrared spectroscopy (FTIR). Morphologies of PEC NF membranes (PEC-NFMs) and HPEC NF membranes (HPEC-NFMs) were characterized by field emission scanning electron microscope (FESEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM); and their hydrophilicity was characterized by water contact angle (CA). Effects of PEI and MWCNT content on the surface zeta potential and NF performance were investigated thoroughly. It was found that the surface charge character of PEC-NFMs changed from negative to positive with increasing the PEI content. The water flux of HPEC-NFMs dramatically increased from 13.4 to 27.0 L mâ2 hâ1 with increasing the mass ratio of MWCNTs to SA from 0 to 0.050, and the MgCl2 rejection maintained at around 93.5% (testing with 1 g Lâ1 aqueous MgCl2 solution at 25 °C and 0.6 MPa). Moreover, the HPEC-NFM-3 exhibited a good Na+/Mg2+ selectivity. This study provided an effective approach for fabricating positively charged NF membranes with enhanced NF performance, which suits well for water softening.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 492, 15 October 2015, Pages 412-421
Journal: Journal of Membrane Science - Volume 492, 15 October 2015, Pages 412-421
نویسندگان
Feng-Yang Zhao, Quan-Fu An, Yan-Li Ji, Cong-Jie Gao,