Facile fabrication of underwater superoleophobic membrane based on polyacrylamide/chitosan hydrogel modified metal mesh for oil–water separation. Issue 15 (21st February 2022)

• Record Type: Journal Article
• Authors: Zhang, Yang; Cao, Zheng; Luo, Zili; Li, Wenjun; Fu, Tao; Qiu, Wang; Lai, Zhirong; Cheng, Junfeng; Yang, Haicun; Ma, Wenzhong; Liu, Chunlin
• Is Part Of: Journal of polymer science. Volume 60:Issue 15(2022)
• Page Start: 2329
• Page End: 2342
• Publication Date: 2022-02-21
• Subjects: chitosan -- hydrogel -- metal mesh -- oil–water separation -- underwater superoleophobic; Polymers -- Periodicals; Polymerization -- Periodicals; Polymerization; Polymers; Periodicals; 547.7
• DOI: 10.1002/pol.20210923
• Languages: English
• ISSNs: 2642-4150

Abstract

Abstract: Using chemically etched stainless steel mesh (SSM) as matrix, chitosan (CS) as the hydrophilic component and acrylamide as (AAm) monomer, the underwater superoleophobic membrane (PAAm/CS@SSM) for oil–water separation was prepared by free radical polymerization initiated by ultraviolet light. The composition, morphology, underwater oil contact angle, and structure of PAAm/CS@SSM were characterized by Fourier‐transform infrared spectroscopy, x‐ray powder diffraction, scanning electron microscopy, and confocal laser scanning microscopy. The underwater oil contact angles of PAAm/CS@SSM could reach 154.5°. When the number of oil–water cycles reached 20 times, the oil–water separation efficiency of PAAm/CS@SSM was larger than 99%. When the oil–water ratio is 1:3, 1:2, 1:1, 2:1, 3:1, the oil–water separation flux of PAAm/CS@SSM was 2096.8, 4457.9, 4735.7, 5395.7, and 3606.9 L·m· −2 ·h −1, respectively. When oils are n‐hexane, petroleum ether, vegetable oil, and liquid paraffin, the oil–water separation efficiency of PAAm/CS@SSM was 99.0%, 97.7%, 97.2%, and 99.3%, respectively. After the wear resistance test, the PAAm/CS@SSM membrane still exhibited underwater super‐oleophobicity (>150°). Abstract :