Journal of Membrane Science & Technology

Preparation and characterization of amphiphilic polyamide nanofiltration membrane with improved antifouling properties by two-step surface modification method

2^nd International Conference on Membrane Science and Technology

September 13-14, 2018 | London, UK

Congjie Gao, Jiangnan Shen, Huimin Ruan, Bin Li, Jianbin Ji, Arcadio Sotto and Bart Van der Bruggen

Zhejiang University of Technology, China
Rey Juan Carlos University, España
KU Leuven, Belgium

Scientific Tracks Abstracts: J Membr Sci Technol

Abstract:

Membrane fouling is an urgent problem to be solved in practical application. In this study, an amphiphilic nanofiltration membrane with hydrophilic domains as well as low surface energy domains was developed, in order to integrate a foulingresistant defense mechanism and a fouling-release defense mechanism. A simple and effective two-step surface modification of polyamide NF membrane was applied. Firstly, triethanolamine with many hydrophilic functional groups was grafted to the surface by reacting with the residual acyl chloride group of nanofiltration membrane, which makes the nanofiltration membranes more hydrophilic; secondly, the 1H, 1H, 2H, 2H-Perfluorodecyltrichlorosilane which is usually known as a low surface energy material was covalently grafted on hydroxyl functional groups through hydrogen bonding. The membranes were characterized by X-ray photoelectron spectroscopy (XPS), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and zeta potential measurements, scanning electron microscopy (SEM), contact angle measurement (WCA) and atomic force microscopy (AFM). Experiments with model foulants (bovine serum albumin (BSA) protein solution, humic acid solution (HA) and sodium alginate solution (SA)) were performed to estimate the antifouling property of the newly developed nanofiltration membranes. Compared with blank control PA/PSF membrane and hydrophilic modified H4-PA/PSF membrane, the antifouling property of amphiphilic modified F-PA/PSF membrane was observed to be enhanced. The flux recovery ratio was 96.9%, 97.5%, and 96.8% for bovine serum albumin protein solution, humic acid solution and sodium alginate solution, while the FRR of PA/PSF membrane were 87.0%, 83.3%, and 86.8% for BSA solution, HA solution and SA solution. Recent Publications: 1. Ruan H, Zheng Z, Pan J, et al. (2018) Mussel-inspired sulfonated polydopamine coating on anion exchange membrane for improving permselectivity and anti-fouling property. Journal of Membrane Science 550:427???435. 2. Zhao Y, Zhu J, Ding J, et al. (2018) Electric-pulse layer-by-layer assembled of anion exchange membrane with enhanced monovalent selectivity. Journal of Membrane Science 548:81???90. 3. Liu H, Jiang Y, Ding J, et al. (2017) Surface layer modification of AEMs by infiltration and photo cross-linking to induce monovalent selectivity. Aiche Journal 64. 4. Liu H, Ruan H, Zhao Y, et al. (2017) A facile avenue to modify polyelectrolyte multilayers on anion exchange membranes to enhance monovalent selectivity and durability simultaneously. Journal of Membrane Science 543. 5. Chen X, Jiang Y, Yang S, et al. (2017) Internal cross-linked anion exchange membranes with improved dimensional stability for electrodialysis. Journal of Membrane Science 542.

Biography :

Congjie Gao, the member of Chinese Academy of Engineering since 1995, is working at Zhejiang University of Technology. He is the dean of the Ocean College and the director of the Center for Membrane and Water Science and Technology. His researches always focus on the membrane separation and water treatment more than 50 years. He has accomplished more than 20 key task-research programs financially supported by state, province and administration in the aspects of hollow fiber RO membrane, and composite RO and NF membranes, charged and alloy UF membranes, as well as related modules and technological processes. His specialities include desalination of seawater and brackish water, water reuse, cleaner production and renovating conventional industries with membrane technologies, etc. Prof. Gao has published more than 330 SCI articles cited more than 4309 (H-index: >37), and published 5 academic books. He has won the top grade prize of national science and technology progress and more other prizes including Provincial-level and Ministry-class. Prof. Gao has made an outstanding contribution to the development of membrane science and technology in China.

E-mail: gaocj@zjut.edu.cn