Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium; National Engineering Research Centre of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China.
Laboratory of Molecular Cell Biology, Department of Biology, Institute of Botany and Microbiology, KU Leuven, 3001 Leuven, Belgium.
J Hazard Mater. 2022 Oct 15;440:129744. doi: 10.1016/j.jhazmat.2022.129744. Epub 2022 Aug 10.
With the advent of increasingly loose nanofiltration membranes for dye desalination, synthesis methods based on interfacial polymerization and bio-inspired materials such as polydopamine (pDA) have been investigated. However, the long polymerization time of pDA greatly limits the synthesis and application of fast dye/salt separation membranes. In this work, prebiotic chemistry-inspired aminomalononitrile (AMN) was used as a binder to co-deposit the Mannich reaction of tetrakis(hydroxymethyl)phosphonium chloride (THPC) and polyethyleneimine (PEI) to form the positively charged selective layer rapidly. The optimum membrane had a water permeance of 30.7 LMH bar and a rejection of positively charged Victoria blue B (VBB, 200 ppm) and NaSO (1 g/L) of 99.5 % and 9.9 %, respectively. Moreover, the results of a practical application test showed that it had excellent separation performance towards various positively charged dyes and salts. In addition, the actual application test results show that the membrane has good long-term stability during application. In terms of antifouling and antibacterial, the membrane has excellent antibacterial and antifouling properties., Further antibacterial tests were carried out, and the inactivation effect of the membrane on E. coli was also confirmed. The preparation method proposed in this work provides technical support for developing new dye/salt separation membranes.
随着用于染料脱盐的越来越宽松的纳米过滤膜的出现，基于界面聚合和生物启发材料（如聚多巴胺（pDA））的合成方法已经得到了研究。然而，pDA 的聚合时间长极大地限制了快速染料/盐分离膜的合成和应用。在这项工作中，受前生物化学启发的氨甲腈（AMN）被用作粘结剂，共同沉积四羟甲基氯化磷（THPC）和聚乙烯亚胺（PEI）的曼尼希反应，以快速形成带正电荷的选择层。最佳膜的水透过率为 30.7 LMH bar，对带正电荷的维多利亚蓝 B（VBB，200 ppm）和 NaSO（1 g/L）的截留率分别为 99.5%和 9.9%。此外，实际应用测试结果表明，该膜对各种带正电荷的染料和盐具有优异的分离性能。此外，实际应用测试结果表明，该膜在应用过程中具有良好的长期稳定性。在抗污和抗菌方面，该膜具有优异的抗菌和抗污性能。进一步进行了抗菌测试，也证实了膜对大肠杆菌的灭活效果。本工作提出的制备方法为开发新型染料/盐分离膜提供了技术支持。
