Facile preparation of ultralong polypyrrole nanowires-coated membrane for switchable emulsions separation and dyes adsorption. (October 2022)

• Record Type: Journal Article
• Authors: Yan, Yuanyang; Zhou, Peizhang; Zhang, Shuan; Yin, Xinyu; Zeng, Xinjuan; Pi, Pihui; Nong, Yunjun; Wen, Xiufang
• Is Part Of: Journal of water process engineering. Volume 49(2022)
• Publication Date: 2022-10
• Subjects: Polypyrrole nanowires -- Switchable wettability -- Electrodeposition -- Oil/water emulsion separation -- Dyes adsorption; Water-supply engineering -- Periodicals; Saline water conversion -- Periodicals; Seawater -- Distillation -- Periodicals; Sanitary engineering -- Periodicals; Sewage -- Purification -- Periodicals; 627
• DOI: 10.1016/j.jwpe.2022.102942
• Languages: English
• ISSNs: 2214-7144

Abstract

Abstract: Herein, an ultralong polypyrrole nanowires-coated stainless steel mesh (PPy@SSM) was successfully prepared to cope with the on-demand separation of oil/water emulsions as well as dyes adsorption via electrodeposition. The as-prepared PPy@SSM could be switched from superhydrophilic to hydrophobic under electric field for at least 50 times. Benefiting from the high porosity and its selective wettability, the PPy@SSM exhibited excellent separation efficiency of up to 99.88 % and high filtration flux of up to 2984 L m −2 h −1 for both oil-in-water and water-in-oil emulsions, even for the high viscous crude oil-in-water emulsion. Thanks to the surface charge, abundant aromatic rings of PPy, and porous structure, PPy@SSM also achieved selective adsorption of cationic or anionic dyes with high efficiency (up to 99.28 %) under diverse pH conditions. Moreover, the PPy@SSM also displayed a strong chemical resistance and mechanical stability under harsh conditions such as extreme temperature, corrosive environments, and various friction tests. Combined with a simple and environmental-friendly fabrication process, the high-performance membrane PPy@SSM has promising applications in the separation of oil/water emulsions and the adsorption of dyes.