Tang Yuanyuan, Cao Lu, Xu Li, Wang Zhaoyu, Shi Qian, Zhang Yingying, Yu Liangmin
Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology, National Engineering and Technological Research Center of Marine Monitoring Equipment, Qingdao 266100, China.
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
Polymers (Basel). 2022 Apr 20;14(9):1671. doi: 10.3390/polym14091671.
To address trade-off and membrane-fouling challenges during the development of nanofiltration membranes, a thin-film composite membrane was prepared on the basis of interfacial polymerization regulated by adjusting the capsaicin-derived self-polymer poly N-(2-hydroxy-5-(methylthio) benzyl) acrylamide (PHMTBA) on the polysulfone substrate in this study. Through the self-polymerization of the monomer HMTBA with varied contents, microwave-assisted technology was employed to develop a variety of PHMTBAs. It was discovered that PHMTBA is involved in the interfacial polymerization process. Piperazine and PHMTBA competed for the reaction with trimesoyl chloride, resulting in a flatter and looser membrane surface. The PHMTBA-modified membrane presented a typical double-layer structure: a thicker support layer and a thinner active layer. The addition of PHMTBA to membranes improved their hydrophilicity and negative charge density. As a result, the PHMTBA-modified membrane showed dependable separation performance (water flux of 159.5 L m h and rejection of 99.02% for NaSO) as well as enhanced anti-fouling properties (flux recovery ratio of more than 100% with bovine serum albumin-fouling and antibacterial efficiency of 93.7% against ). The performance of the prepared membranes was superior to that of most other modified TFC NF membranes previously reported in the literature. This work presents the application potential of capsaicin derivatives in water treatment and desalination processes.
为了应对纳滤膜开发过程中的权衡和膜污染挑战，本研究在聚砜基底上，通过调节辣椒素衍生的自聚物聚N-(2-羟基-5-(甲硫基)苄基)丙烯酰胺(PHMTBA)来调控界面聚合，制备了一种复合薄膜。通过微波辅助技术，使单体HMTBA在不同含量下进行自聚合，从而制备出多种PHMTBA。研究发现，PHMTBA参与了界面聚合过程。哌嗪和PHMTBA竞争与均苯三甲酰氯的反应，导致膜表面更平整、更疏松。PHMTBA改性膜呈现出典型的双层结构：较厚的支撑层和较薄的活性层。向膜中添加PHMTBA提高了其亲水性和负电荷密度。结果，PHMTBA改性膜表现出可靠的分离性能(水通量为159.5 L m h，对NaSO的截留率为99.02%)以及增强的抗污染性能(牛血清白蛋白污染后的通量恢复率超过100%，对细菌的抗菌效率为93.7%)。所制备膜的性能优于文献中先前报道的大多数其他改性复合纳滤膜。这项工作展示了辣椒素衍生物在水处理和海水淡化过程中的应用潜力。
