Jia Hongshan, Zhan Yingqing, Zhu Fei, Chen Ximin, Duan Xinyue, Zhang Ning, Liu Jie, Li Yinlong
College of Chemistry and Chemical Engineering, Southwest Petroleum University, 8 Xindu Avenue, Chengdu, Sichuan, China.
College of Chemistry and Chemical Engineering, Southwest Petroleum University, 8 Xindu Avenue, Chengdu, Sichuan, China; State Key Lab of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, 8 Xindu Avenue, Chengdu, Sichuan, China; Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu, Sichuan, China.
J Hazard Mater. 2024 Dec 5;480:135941. doi: 10.1016/j.jhazmat.2024.135941. Epub 2024 Sep 23.
Nano-structured hydrogel with unique anti-oil fouling property exhibits big advantage in oil/water separation, but its application in complex oily wastewater (contain oils, organic matter, bacteria, etc.) cleanup is hampered by the insufficient capabilities in multi-antifouling and synergistic treatment. Herein, we constructed the amino-rich NH-AgBiS/PANI (polyaniline)-g-CN based multi-functional hydrogel functional layer onto the polyacrylonitrile (PAN) fiber membrane via polyphenol-mediated chitosan gelation and vacuum-assisted self-assembly techniques. The unique honeycomb-like structure and super-wetting feature synergistically contributed to the powerful oil resistance and flux breakthrough of composite membrane. Such membrane achieved superior permeability (up to 3558 L m h) for various SDS-stabilized oil-in-water emulsions and remarkable synergistic treatment efficiency of multicomponent pollutant-oil-water emulsion. The rational design of hydrogel layer on membrane surface intensified the photo-response ability and multiple electron transport channels, which offered the favorable photocatalytic self-cleaning performance towards degradation of organic dyes. According to the free radical quenching and EPR experiments, the photocatalytic mechanism was proposed. In addition, the inhibition rate of E. coli could reach 100 % under illumination of 24 h. Therefore, the integration of ultra-low oil adhesion, photocatalytic self-cleaning, and antibacterial features endows membrane with exceptional multiple anti-fouling performance, exhibiting unique advantages over traditional membranes in handling complex membrane fouling issues.
具有独特抗油污性能的纳米结构水凝胶在油水分离方面具有很大优势，但其在复杂含油废水（含有油、有机物、细菌等）净化中的应用受到多抗污和协同处理能力不足的阻碍。在此，我们通过多酚介导的壳聚糖凝胶化和真空辅助自组装技术，在聚丙烯腈（PAN）纤维膜上构建了富含氨基的NH-AgBiS/PANI（聚苯胺）-g-CN基多功能水凝胶功能层。独特的蜂窝状结构和超润湿性协同作用，有助于复合膜具有强大的耐油性和通量突破。这种膜对各种SDS稳定的水包油乳液具有优异的渗透性（高达3558 L m⁻² h⁻¹），并且对多组分污染物 - 油水乳液具有显著的协同处理效率。膜表面水凝胶层的合理设计增强了光响应能力和多个电子传输通道，这为有机染料的降解提供了良好的光催化自清洁性能。根据自由基猝灭和电子顺磁共振实验，提出了光催化机理。此外，在24小时光照下，大肠杆菌的抑制率可达100%。因此，超低油附着力、光催化自清洁和抗菌功能的整合赋予膜卓越的多重抗污性能，在处理复杂的膜污染问题方面比传统膜具有独特优势。
