Research School of Polymeric Materials, School of Materials Science & Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China.
Research School of Polymeric Materials, School of Materials Science & Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China.
Int J Biol Macromol. 2023 Jun 1;239:124264. doi: 10.1016/j.ijbiomac.2023.124264. Epub 2023 Mar 30.
Due to their large specific surface area and numerous diffusion channels, hollow fibers are widely used in wastewater treatment. In this study, we successfully synthesized a chitosan (CS)/polyvinylpyrrolidone (PVP)/polyvinyl alcohol (PVA) hollow nanofiber membrane (CS/PVP/PVA-HNM) via coaxial electrospinning. This membrane demonstrated remarkable permeability and adsorption separation. Specifically, the CS/PVP/PVA-HNM had a pure water permeability of 4367.02 L·m·h·bar. The hollow electrospun nanofibrous membrane exhibited a continuous interlaced nanofibrous framework structure with the extraordinary advantages of high porosity and high permeability. The rejection ratios of CS/PVP/PVA-HNM for Cu, Ni, Cd, Pb, malachite green (MG), methylene blue (MB) and crystal violet (CV) were 96.91 %, 95.29 %, 87.50 %, 85.13 %, 88.21 %, 83.91 % and 71.99 %, and the maximum adsorption capacities were 106.72, 97.46, 88.10, 87.81, 53.45, 41.43, and 30.97 mg·g, respectively. This work demonstrates a strategy for the synthesis of hollow nanofibers, which provides a novel concept for the design and fabrication of highly efficient adsorption and separation membranes.
由于具有较大的比表面积和众多的扩散通道，中空纤维广泛应用于废水处理。在本研究中，我们通过同轴静电纺丝成功合成了壳聚糖（CS）/聚乙烯吡咯烷酮（PVP）/聚乙烯醇（PVA）中空纳米纤维膜（CS/PVP/PVA-HNM）。该膜表现出显著的渗透和吸附分离性能。具体来说，CS/PVP/PVA-HNM 的纯水渗透通量为 4367.02 L·m·h·bar。中空电纺纳米纤维膜具有连续交错的纳米纤维骨架结构，具有高孔隙率和高渗透性等卓越优势。CS/PVP/PVA-HNM 对 Cu、Ni、Cd、Pb、孔雀石绿（MG）、亚甲基蓝（MB）和结晶紫（CV）的截留率分别为 96.91%、95.29%、87.50%、85.13%、88.21%、83.91%和 71.99%，最大吸附容量分别为 106.72、97.46、88.10、87.81、53.45、41.43 和 30.97 mg·g。这项工作展示了一种合成中空纳米纤维的策略，为设计和制造高效吸附分离膜提供了新的概念。
