Abstract
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 1200min 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 2M NaCl aqueous solution.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
