膜
聚酰胺
海水淡化
纳滤
生物污染
化学工程
反渗透
薄膜复合膜
材料科学
纳米材料
选择性
二价
微咸水
高分子化学
化学
有机化学
纳米技术
地质学
工程类
盐度
生物化学
催化作用
冶金
海洋学
作者
Qiang Xue,Wenqiao Meng,Jinyuan Zhu,Qing Fang,Kaisong Zhang
标识
DOI:10.1016/j.memsci.2023.121860
摘要
Constructing nanomaterials interlayer for high-performance polyamide membranes is a popular technique in brackish water desalination, while selecting a suitable nanomaterial and convenient method for constructing interlayer remains a challenge. Herein, easily-modified MXene nanosheets were carboxylated to obtain excellent hydrophilicity, negative charge, and good compatibility with polymer, which were applied to construct carboxylated MXene (COOH-MXene) interlayered polyamide membranes by facile brushing process. COOH-MXene nanosheets have good compatibility with polyamide and supporting membranes, and make the membrane surface wrinkled, hydrophilic and negatively charged. The optimized membrane achieves a water flux of 12.9 Lm−2h−1bar−1, 2.9 times of the blank membrane. The MgSO4 rejection is improved to 99.1%, and the NaCl rejection is only 11.4%, displaying excellent selectivity for monovalent and divalent ions. Moreover, the prepared membranes have good antifouling properties and long-lasting desalination performance. This study presents a new approach to brackish water desalination by constructing COOH-MXene interlayered membranes.
科研通智能强力驱动
Strongly Powered by AbleSci AI