文献类型：期刊文献

英文题名：Ultrathin alkyl-chain functionalized covalent organic polymer nanofilms for separation in hydrocarbon system

作者：Ma, Chaoyi[1,2];Yang, Hui[1,2];Gu, Shuyun[1,2];Zhou, Linlong[1,2];Li, Siyao[1,2];Xu, Zhi[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai Key Lab Multiphase Mat Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2026

卷号：740

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;EI(收录号：20254819598094);WOS:【SCI-EXPANDED(收录号:WOS:001628858200001)】；

基金：This work was financially supported by National Key Research & Development Program of China (Grant No. 2024YFB3815600) , National Natural Science Foundation of China (Grant No. 22308099, 22478109, and 23FAA02066) .

语种：英文

外文关键词：Molecular sieving; Covalent organic polymer membranes; Hydrocarbon system; Pharmaceutical application

摘要：Membrane-based separation presents a promising and energy-efficient alternative to conventional energy-intensive processes for separation in hydrocarbon systems. However, the current practical application of membrane separation is hindered by the poor stability and insufficient sieving capability in non-polar organic solvents. In this work, a series of aldehyde monomers with tunable alkyl side chains were adopted and combined with tetrahedral amine monomer to prepare covalent organic polymer nanofilms with sub-10 nm thickness via interfacial polymerization. The extension of alkyl side chains precisely regulated the pore nanostructure and chemical properties of the membranes, optimizing transport pathways for hydrocarbons. The resulting TAM-C4 nanofilm demonstrated an exceptional solvent permeance in hydrocarbon systems, with a toluene permeance of 23.9 L m(-2) h(-1) bar(-1) and a hexane permeance of 22.0 L m(-2) h(-1) bar(-1), while maintaining accurate molecular sieving for small molecules with molecular weight <440 Da. Moreover, the TAM-C4 nanofilm achieved 5.2-fold enrichment of active pharmaceutical ingredients within 5 h, outperforming commercial membranes due to its remarkable selectivity and efficient solvent transport capabilities in hexane. Their tunable nanostructure and robust separation performance position them as promising alternatives for separating small molecules in hydrocarbon systems, offering a feasible energy-saving separation method for pharmaceutical industry.