Zuo Jihao, Lu Mengkang, Cai Jinting, Lan Ruopeng, Zeng Xinjuan, Zhou Cailong
Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China of Ministry of Agriculture and Rural Affairs, School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China.
Key Laboratory of Green Surface Technology and Functional Coatings for Materials, China National Light Industry, School of Materials and Energy, Foshan University, Foshan 528000, China.
Membranes (Basel). 2025 Feb 1;15(2):42. doi: 10.3390/membranes15020042.
The discharge of large volumes of textile dyeing wastewater, characterized by poor biodegradability and high toxicity, poses severe threats to the environment. In this study, polyvinylidene difluoride (PVDF) membranes were prepared using the nonsolvent-induced phase separation (NIPS) method, with porous amino-functionalized mesoporous silica nanoparticles (Am-MSNs) mixed into the casting solution to fabricate the Am-MSN/PVDF mixed matrix membranes. By varying the amount of Am-MSNs added, the microstructure and overall performance of the membranes were comprehensively analyzed. The results demonstrated that the addition of Am-MSNs significantly enhanced the hydrophilicity of the membranes. The high specific surface area and amino groups of Am-MSNs facilitated interactions with dye molecules, such as Reactive Black 5 (RB5), through hydrogen bonding, electrostatic attraction, and physical adsorption, resulting in a marked improvement in RB5 rejection rates. Static adsorption tests further validated the superior adsorption capacity of the Am-MSN/PVDF mixed matrix membranes for RB5. Additionally, the nanoscale mesoporous structure of Am-MSNs enhanced the mechanical strength of the membranes. The synergistic effects of the mesoporous structure and amino groups significantly increased the efficiency and stability of the Am-MSN/PVDF mixed matrix membranes in dye removal applications, providing an effective and sustainable solution for the treatment of dye-contaminated wastewater.
大量纺织印染废水的排放，其特点是生物降解性差和毒性高，对环境构成了严重威胁。在本研究中，采用非溶剂诱导相分离（NIPS）法制备了聚偏氟乙烯（PVDF）膜，将多孔氨基功能化介孔二氧化硅纳米颗粒（Am-MSNs）混入铸膜液中制备Am-MSN/PVDF混合基质膜。通过改变Am-MSNs的添加量，对膜的微观结构和整体性能进行了综合分析。结果表明，Am-MSNs的添加显著提高了膜的亲水性。Am-MSNs的高比表面积和氨基通过氢键、静电吸引和物理吸附促进了与染料分子（如活性黑5，RB5）的相互作用，导致RB5截留率显著提高。静态吸附试验进一步验证了Am-MSN/PVDF混合基质膜对RB5的优异吸附能力。此外，Am-MSNs的纳米级介孔结构增强了膜的机械强度。介孔结构和氨基的协同作用显著提高了Am-MSN/PVDF混合基质膜在染料去除应用中的效率和稳定性，为处理染料污染废水提供了一种有效且可持续的解决方案。
