کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
623606 1455358 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced antibiofouling of RO membranes via polydopamine coating and polyzwitterion immobilization
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Enhanced antibiofouling of RO membranes via polydopamine coating and polyzwitterion immobilization
چکیده انگلیسی


• Polydopamine (PDA) was coated on RO membrane as a precursor layer.
• Polyzwitterion was covalently immobilized on PDA coating layer.
• Antibiofouling properties of modified membranes were successfully improved.
• Stability of immobilized polyzwitterion was improved by PDA precursor layer.

It has been reported that polyzwitterions (PZs) can significantly improve the antibiofouling properties of membrane surfaces. In addition, it is known that polydopamine (PDA) can deposit non-selectively from solution onto virtually any solid surface and creates a versatile surface for further modification through its reactive groups. In this paper, we attempted to use a PDA coating as a precursor layer to enhance the durability and antibiofouling potential of a PZ-immobilized membrane. The deposition of PDA and PZ was confirmed by X-ray photoelectron spectroscopy. The hydrophilicity was not markedly increased by surface modification. Moreover, the membrane surface charge density was changed from negative to neutral by PZ immobilization. Nevertheless, an improvement in antibiofouling properties was confirmed by cross-flow filtration of a bacterial (Pseudomonas putida) suspension. The high antiadhesion properties of membranes modified with a PDA coating and/or PZ immobilization was confirmed by scanning electron microscope surface images after 1200 min filtration of the bacterial suspension. Moreover, the PDA precursor layer was confirmed to increase the stability of a PZ layer immobilized on the membrane surface by bacterial suspension filtration experiments after one month of immersion in 2 M NaCl aqueous solution.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 337, 17 March 2014, Pages 23–30
نویسندگان
, , ,