Hu Ying, Jiang Jialun, Dong Jingya, Wang Meng, Liu Shasha, Tang Hai, Hong Ran, He Qinfeng, Wada Masahisa, Teng Bochen, Sun Bianjing, Sun Dongping
Department of Environmental Engineering, School of Chemical and Environmental Engineering, Anhui Polytechnic University, Beijing Middle Road, Wuhu 241000, China.
Department of Environmental Engineering, School of Chemical and Environmental Engineering, Anhui Polytechnic University, Beijing Middle Road, Wuhu 241000, China.
Int J Biol Macromol. 2025 Mar;293:139419. doi: 10.1016/j.ijbiomac.2024.139419. Epub 2024 Dec 31.
Water purification has always been a critical yet challenging issue. In this study, an organic-inorganic composite membrane was developed using 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-oxidized bacterial cellulose (BC) nanofibers and hydroxyapatite nanowires (HAPNW) with tunable wettability for advanced membrane separation applications. The resulting free-standing TEMPO-BC/HAPNW filter membrane exhibited strong mechanical strength, high flexibility, exceptional deformability, and a high pure water flux of up to 800 L·m·h due to its porous architecture and inherent hydrophilicity. Additionally, the filter membrane demonstrated long-term high rejection efficiency towards TiO nanoparticles and methylene blue through size exclusion and electrostatic interaction. Notably, the surface wettability of the composites switched to being hydrophobic and lipophilic after in situ modification, enabling superior separation of various organic solvents and oils while maintaining cycle stability. This work presents a novel biomass-derived filter membrane for efficient and sustainable wastewater treatment with high performance, easy scale-up, and green regeneration.
水净化一直是一个关键但具有挑战性的问题。在本研究中，使用2,2,6,6-四甲基哌啶-1-氧基自由基（TEMPO）氧化的细菌纤维素（BC）纳米纤维和羟基磷灰石纳米线（HAPNW）开发了一种具有可调润湿性的有机-无机复合膜，用于先进的膜分离应用。所得的独立式TEMPO-BC/HAPNW滤膜由于其多孔结构和固有的亲水性，表现出强大的机械强度、高柔韧性、出色的可变形性以及高达800 L·m²·h的高纯水通量。此外，该滤膜通过尺寸排阻和静电相互作用，对TiO₂纳米颗粒和亚甲基蓝表现出长期的高截留效率。值得注意的是，原位改性后复合材料的表面润湿性转变为疏水亲油，在保持循环稳定性的同时，能够实现各种有机溶剂和油的优异分离。这项工作展示了一种新型的生物质衍生滤膜，用于高效、可持续的废水处理，具有高性能、易于放大和绿色再生的特点。
