Effective construction of anti-fouling zwitterion-functionalized ceramic membranes for separation of oil-in-water emulsion based on PDA/PEI co-deposition. Issue 5 (October 2022)

• Record Type: Journal Article
• Authors: Luan, Wei; Nie, Chengyu; Chen, Xianfu; Tang, Zhenchen; Qiu, Minghui; Fan, Yiqun
• Is Part Of: Journal of environmental chemical engineering. Volume 10:Issue 5(2022)
• Publication Date: 2022-10
• Subjects: DA dopamine -- PDA polydopamine -- PEI polyethyleneimine -- SBES sodium 2-bromoethylsulfonate -- DI water deionized water -- CM ceramic membrane -- FESEM field emission scanning electron microscope -- AFM atomic force microscope -- FTIR fourier transform infrared spectroscopy -- XPS X-ray photoelectron spectroscopy -- TGA Thermal gravity analysis -- CA contact angle -- TOC total organic carbon; Ceramic membrane -- Zwitterionic modification -- Anti-fouling -- Oil-in-water emulsion; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2022.108396
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: Ceramic membranes have been widely used in oil-water separation owing to their characteristics of high flux, excellent chemical stability, strong hydrophilicity, and good fouling resistance. To further enhance their anti-fouling performance, a co-deposition reaction was employed for the surface modification of the ceramic membranes in this study. Polyethyleneimine and dopamine were used to introduce tertiary amine groups on the surface of the ceramic membranes, and sodium 2-bromoethanesulfonate was used for the quaternization reaction with tertiary amine groups. According to the water contact angle measurements, the ceramic membrane functionalized via zwitterionic modification exhibited better hydrophilicity and thus could absorb water droplets faster than pristine ceramic membranes. Consequently, the zwitterion-functionalized ceramic membrane achieved double the permeance (40 L m −2 h −1 bar -‍1 ) compared to the original ceramic membrane (20 L m −2 h −1 bar -‍1 ) during the separation of the oil-in-water emulsion, suggesting good anti-fouling performance. Graphical Abstract: ga1 Highlights: The zwitterionic ceramic membrane was fabricated by a two-step grafting method. Polydopamine enhances the modification of zwitterions on ceramic membrane. The surface hydrophilicity was enhanced after the zwitterionic modification. The prepared membrane shows an antifouling property in O/W emulsion separation.