A rigid-flexible interpenetrating polyamide reverse osmosis membrane with improved antifouling property fabricated via two step modifications
A rigid-flexible interpenetrating polyamide reverse osmosis membrane with improved antifouling property fabricated via two step modifications
复制标题
通过两步改性制备出具有改进防污性能的刚柔互穿聚酰胺反渗透膜
DOI：
10.1016/j.memsci.2021.119625
复制
发表时间：
2021-11
期刊：
影响因子：
--
通讯作者：
Li-Fen Liu
中科院分区：
文献类型：
--
作者：
Fang-Fang Chen;Ting Su;Xue-Ting Zhao;Jie-Feng Pan;Li-Fen Liu
聚酰胺薄膜复合反渗透（RO）膜存在严重的膜污染问题，限制了反渗透技术的广泛应用。本研究采用两步改性的方法制备了一种新型的软硬互穿聚酰胺反渗透膜，以减轻反渗透过程中的膜污染。第一步改性是在芳香族间苯二胺（MPD）水溶液中引入新型脂肪族二胺1，3-二氨基-2-丙醇（DAPL），与均苯三甲酰氯（TMC）反应形成刚柔互穿聚酰胺（PA）隔离层，以提高PA的渗透性。然后，通过在基于DAPL的PA层的顶表面上接枝PVA来进行第二改性，以定制更亲水、更光滑和带负电荷更少的表面，并赋予改性膜有利的耐水性。在优化条件下，改性膜的渗透通量达到58.6 L/m2 h，比未改性膜的渗透通量（36.9 L/m2 h）提高了58.8%，脱盐率保持在99.6%左右。同时，改性后的反渗透膜对亚甲基蓝（MB）和结晶紫（CV）的污染具有良好的抵抗能力，通量恢复率分别为76.8%和84.2%。本研究为制备具有良好综合分离性能的新型反渗透复合膜提供了一条简便有效的途径。
Polyamide thin-film composite reverse osmosis (RO) membranes usually suffer from fouling problem, which greatly limits the wide application of RO technology. In this study, a novel rigid-flexible interpenetrating polyamide RO membrane was fabricated via two step modifications to alleviate the membrane fouling during the RO process. The first step modification was carried out by incorporation a new aliphatic diamine of 1,3-diamino-2-propanol (DAPL) into the aromatic m-phenylenediamine (MPD) aqueous solution to react with trimesoyl chloride (TMC) to form a rigid-flexible interpenetration polyamide (PA) separation layer for enhancing its permeability. Then, the second modification was performed by grafting PVA on the top surface of the DAPL-based PA layer to tailor more hydrophilic, smoother and less negatively charged surface and endowed the modified membrane favorable antifouling property. Under the optimized condition, the permeability flux of the modified RO membrane reached 58.6 L/m2h with an about 58.8% increase than the pristine RO membrane (about 36.9 L/m2h), and the salt rejection was also maintained about 99.6% without any loss. At the same time, the modified RO membrane presented a favorable resistance to the dye foulants of methylene blue (MB) and crystal violet (CV) with flux recovery rate of 76.8% and 84.2% respectively. This study provides a facile and effective way to fabricate a novel antifouling reverse osmosis composite membrane with favorable comprehensive separation performance.
登录
查看更多内容
影响因子：
15.1
作者：
Mrinmoy Mondal;S. De
通讯作者：
Mrinmoy Mondal;S. De
沸石咪唑酯骨架-8@聚多巴胺改性薄膜复合膜增强防污性能
影响因子：
8.8
作者：
Zhang Gehong;Zhang Jie;Lv Pinghai;Sun Jian;Zhao Pingge;Yang Leilei
通讯作者：
Yang Leilei
影响因子：
9.5
作者：
Jin, Ying;Su, Zhaohui
通讯作者：
Su, Zhaohui
影响因子：
6.7
作者：
Zhang Yang;Ying Wan;Guoyuan Pan;Y. Hao;Xuerong Yao;Hongwei Shi;Yujing Tang;Wei Xiangrong
通讯作者：
Zhang Yang;Ying Wan;Guoyuan Pan;Y. Hao;Xuerong Yao;Hongwei Shi;Yujing Tang;Wei Xiangrong
影响因子：
9.9
作者：
Henthome, Lisa;Boysen, Buddy
通讯作者：
Boysen, Buddy