Wahid Fazli, Zhao Xue-Qing, Cui Ji-Xiao, Wang Yun-Ya, Wang Feng-Ping, Jia Shi-Ru, Zhong Cheng
State Key Laboratory of Food Nutrition & Safety, Tianjin University of Science & Technology, Tianjin, PR China; Key Laboratory of Industrial Fermentation Microbiology, (Ministry of Education), Tianjin University of Science & Technology, Tianjin, PR China; Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, PR China.
State Key Laboratory of Food Nutrition & Safety, Tianjin University of Science & Technology, Tianjin, PR China; Key Laboratory of Industrial Fermentation Microbiology, (Ministry of Education), Tianjin University of Science & Technology, Tianjin, PR China.
J Colloid Interface Sci. 2022 Aug 15;620:1-13. doi: 10.1016/j.jcis.2022.03.108. Epub 2022 Mar 28.
Superhydrophilic/underwater superoleophobic (SUS) membrane technology has attracted extensive attention for water purification. However, the fabrication of multifunctional membranes to satisfy the complex wastewater treatment is still a big challenge. In this work, bacterial cellulose (BC) based multifunctional SUS membranes were designed for water purification. Membranes were prepared by blending BC nanofibers with TiO nanoparticles (NPs), and further modified by the in situ growth of ZnO-NPs. The composite membranes showed oil/water (o/w) separation under a small driving pressure (0.2-0.3 bar) with a flux rate of 8232.81 ± 212 L mh and with a high separation efficiency (>99.9%). Membranes could also separate oil-in-water emulsion with a separation flux of 1498 ± 74 L mh and with high efficiency (99.25%). Moreover, the composite membrane exhibited photocatalytic activity under visible light with a high efficiency (>92%). The composite membranes were also investigated for antibacterial activity against Gram-positive and Gram-negative bacterial strains. This work may inspire the fabrication of next-generation multifunctional membranes for wastewater treatment, particularly oily wastewater, dyes and microbial contaminated water.
超亲水/水下超疏油（SUS）膜技术在水净化方面已引起广泛关注。然而，制备满足复杂废水处理需求的多功能膜仍然是一项巨大挑战。在本研究中，设计了基于细菌纤维素（BC）的多功能SUS膜用于水净化。通过将BC纳米纤维与TiO纳米颗粒（NPs）共混制备膜，并通过原位生长ZnO-NPs进一步改性。复合膜在小驱动压力（0.2 - 0.3巴）下表现出油水（o/w）分离性能，通量为8232.81±212 L mh，分离效率高（>99.9%）。该膜还能分离水包油乳液，分离通量为1498±74 L mh，效率高（99.25%）。此外，复合膜在可见光下具有高效（>92%）的光催化活性。还研究了复合膜对革兰氏阳性和革兰氏阴性细菌菌株的抗菌活性。这项工作可能会激发下一代用于废水处理，特别是含油废水、染料和微生物污染水的多功能膜的制备。
