کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9684837 | 1456215 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nanofiltration membrane prepared from cardo polyetherketone ultrafiltration membrane by UV-induced grafting method
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: Nanofiltration membrane prepared from cardo polyetherketone ultrafiltration membrane by UV-induced grafting method Nanofiltration membrane prepared from cardo polyetherketone ultrafiltration membrane by UV-induced grafting method](/preview/png/9684837.png)
چکیده انگلیسی
Hydrophilic nanofiltration membranes were prepared by graft polymerization of hydrophilic monomers onto the surface of ultrafiltration membranes made from cardo polyetherketone (PEK-C). The method consists of a UV irradiation in the presence of acrylic for an in situ graft polymerization of polyacrylic acid (PAA) on the surface of the UF membranes. The effect of UV intensity, irradiation time and monomer nature on the membrane performances were investigated. Analyses by Fourier transform infrared in attenuated total reflection mode, contact angles and atomic force microscopy of the modified membrane surface showed that the degree of grafting of the membrane surface and their hydrophilicity increased with the irradiation time. The retention of sodium chloride and sodium sulfate of the membrane with poly(acrylic acid) grafted for 1Â min of UV irradiation under a 8.7Â mW/cm2 lamp were 57 and 95.7%, respectively, while the water flux of the membrane was ca. 25Â LÂ mâ2Â hâ1, at 0.8Â MPa. The changes in the membrane permeability and the salt retention with different grafting parameters suggest that, under a high enough irradiation power and monomer concentration in the surrounding medium, enough PAA chains are grafted on the pores wall to convert the pores of an UF membranes to the NF-type pores (sodium sulfate retention close to 100%) within a few minutes. Further irradiation adds new PAA grafts in the plain polymer surface, without significant changes in the pores, i.e. in the membrane performances. The grade of the obtained NF membrane can be controlled by monitoring the monomer concentration or the irradiation power in order to graft progressively PAA chains on the pores.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 255, Issues 1â2, 15 June 2005, Pages 107-115
Journal: Journal of Membrane Science - Volume 255, Issues 1â2, 15 June 2005, Pages 107-115
نویسندگان
Changquan Qiu, Fan Xu, Quang Trong Nguyen, Zhenghua Ping,