Calcium ion crosslinked sodium alginate coated PVDF membrane for improved smart pH-responsive properties
Calcium ion crosslinked sodium alginate coated PVDF membrane for improved smart pH-responsive properties
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DOI：
10.1016/j.jece.2022.108684
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发表时间：
2022-10-11
影响因子：
7.7
通讯作者：
Zhang, Ganwei
中科院分区：
文献类型：
--
作者：
Yue, Chuan;Zhang, Ganwei
通过浸渍-涂布法将钙离子交联海藻酸钠涂覆到PVDF膜上，制备了具有pH响应特性的智能膜。进行了不同的表征，以验证智能膜的成功制造。所制备的膜具有良好的pH响应性，其通量可以通过改变料液pH值来调节，同时该膜具有良好的自清洁性能，在低pH值条件下，牛奶污染物易于去除。在pH2.0的条件下水洗，膜通量恢复率可达96.3%。此外，智能膜可以有效地用于从水中分离油。膜通量随pH值的变化而变化，但膜的分离效率不受影响，截留率均保持在97.5%以上。本研究为钙离子交联海藻酸钠制备pH响应型智能膜提供了一种新的思路，具有广阔的应用前景。
Smart membrane with pH-responsive properties was fabricated by applying calcium ions crosslinked sodium alginate onto the PVDF membrane via a dip-coating approach. Different characterizations were carried out to verify the successful fabrication of the smart membrane. The prepared membrane has excellent pH-responsive property, and its flux can be adjusted by changing the feed solution pH. The smart membrane also possessed excellent smart self-cleaning performance and the milk contaminants were easily removed in low pH solution. Its flux recovery rate can reach 96.3% when washed with water at pH 2.0. In addition, the smart membrane can be effectively used for separating oil from water. Its flux changed with the pH while its separation efficiency is unaffected, and the rejection rate kept above 97.5% in all cases. This research provides a potential strategy to prepare pH-responsive smart membrane using calcium ions crosslinked sodium alginate that can be used in many fields.