Loose nanofiltration membranes based on interfacial glutaraldehyde-amine polymerization for fast and highly selective dye/salt separation
Loose nanofiltration membranes based on interfacial glutaraldehyde-amine polymerization for fast and highly selective dye/salt separation
复制标题
基于界面戊二醛-胺聚合的松散纳滤膜，用于快速、高选择性的染料/盐分离
DOI：
10.1016/j.cej.2022.138057
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发表时间：
2022
影响因子：
15.1
通讯作者：
Qiugen Zhang
中科院分区：
文献类型：
--
作者：
Tengfei Pei;Miao Deng;Cai Ma;Hao Yan;Aimei Zhu;Liyi Ye;Qinglin Liu;Qiugen Zhang
• An SDS-assisted aldehyde-amine IP process is developed to prepare loose NF membranes. • The aldehyde-amine reaction is helpful to form a skin layer with loose structure. • The membrane has a high water permeance of 76 LMH bar −1 and MB rejection of 99%. • The membrane shows a high dye/salt selectivity with a Na 2 SO 4 rejection of 4.19%. • The membrane has a good anti-fouling ability and excellent operation stability. Loose nanofiltration (NF) membranes based on the interfacial polymerization (IP) reaction between glutaraldehyde (GA) and amine are developed for dye/salt separation. Branched tris(2-aminoethyl)amine (TETA) and linear hydrazine (HZ) are chose as aqueous amine monomers. Due to the low reactivity of aldehyde and amine under room temperature, plenty of evenly distributional cavities with exposed amine groups form in the matrix, favoring to enhance the membrane permeance, hydrophilicity and dye/salt selectivity. Notably, sodium dodecylsulphate (SDS) is introduced to regulate the monomer diffusion behavior and narrow the reaction zone, facilitating the formation of thin and defect-free skin layer. The resulting GA-TETA/HZ-L membrane shows a high water permeance of 76 LMH bar −1 as well as an excellent dye/salt selectivity (99% rejection for methyl blue (MB) and 4.19% rejection for Na 2 SO 4 ). Furthermore, the membrane shows a good anti-fouling property for bovine serum albumin (BSA), humic acid (HA) and sodium alginate (SA), benefiting from its smooth surface, high hydrophilicity and negative zeta potential. The newly demonstrated SDS-assisted aldehyde-amine IP process provides a novel and facile approach to develop the high-performance loose NF membrane for various fields, especially dye recycle and purification.
