Zhou Jing, Li Xianglong, Hou Teng, Zhang Xianggui, Yang Bin
College of Textile Science and Engineering (International Institute of Silk), Zhejiang Sci-Tech University, 310018, China.
College of Textile Science and Engineering (International Institute of Silk), Zhejiang Sci-Tech University, 310018, China.
J Hazard Mater. 2022 Jul 15;434:128858. doi: 10.1016/j.jhazmat.2022.128858. Epub 2022 Apr 4.
Porous membranes with fascinating super-wettable surface and tunable porous architecture for oil-water separation have been developed rapidly, however, the serious secondary marine pollution caused by the non-degradable defectiveness of membranes themselves is still a thorny problem. Herein, we create an eco-friendly membrane with biomimetic cobweb-like nanostructure via assembling two-dimensional bacterial cellulose nanonets on the starch nanofibrous membrane on a large scale. The obtained novel composite membranes exhibit integrated properties of sub-micron pore size, ultrahigh porosity, superhydrophilicity, and underwater superoleophobicity, stemming from the synergistic effect of the hydrated nanonet-skin-layer and porous starch matrix. By virtue of the narrow-distributed sub-micron pores, ultrahigh porosity, and ultrathin thickness, the resulting membrane shows outstanding performance of excellent separation efficiency (up to 99.996%), high percolation flux (maximum of 15968 L m h), well surpassing the conventional microfiltration membranes. More significantly, with the advantage of biodegradability and anti-oil-fouling property, the membrane could serve as the robust platform for long-term wastewater remediation.
具有迷人的超润湿性表面和可调节多孔结构用于油水分离的多孔膜已得到迅速发展，然而，膜本身不可降解的缺陷所导致的严重二次海洋污染仍是一个棘手的问题。在此，我们通过在淀粉纳米纤维膜上大规模组装二维细菌纤维素纳米网，制备了一种具有仿生蜘蛛网状纳米结构的环保膜。所得的新型复合膜展现出亚微米孔径、超高孔隙率、超亲水性和水下超疏油性等综合性能，这源于水合纳米网皮层和多孔淀粉基质的协同效应。凭借窄分布的亚微米孔、超高孔隙率和超薄厚度，所得膜表现出优异的分离效率（高达99.996%）、高渗透通量（最大为15968 L m h）的出色性能，远超传统微滤膜。更重要的是，凭借生物可降解性和抗油污性能的优势，该膜可作为长期废水修复的强大平台。
