膜科学与技术

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N-acetylmorpholinyl polyoxyethylene methacrylates and their toluene/n-heptane pervaporation performance

Authors： ZHOU Manhua, WU Yawei, LI Zhansheng*, ZHANG Shouhai, JIAN Xigao

Units： School of Chemical Engineering, Liaoning High Performance Polymer Engineering Research Center, Dalian university of technology, Dalian 116024, China

KeyWords： pervaporation; aromatic/aliphatic separation; N-acetylmorpholinyl polyoxyethylene methacrylate; solubility selectivity

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2022,42(1):104-109

Abstract：

The pervaporation membrane with excellent performance is the basis for the industrial application of aromatic/aliphatic pervaporation technology. As one of the most promising research subjects in aromatic/aliphatic pervaporation membranes, the performance of the "pore-filling" composite membrane is mainly determined by the functional grafted polymer layer. Learning from the molecular structure of N-formylmorpholine, an excellent solvent for separating and refining aromatic hydrocarbons in the industry, a new type of polyoxyethylene methacrylate macromonomer containing morpholine amide group, i.e., N-acetylmorpholinyl polyoxyethylene methacrylate was designed and synthesized, which could be used as the grafting macromonomer for the preparation of "pore-filling" composite membranes for aromatic/aliphatic pervaporation. The molecular structure of the synthesized N-acetylmorpholinyl polyoxyethylene methacrylate was characterized and confirmed by 1H NMR and the matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF). The results of the equilibrium swelling measurement and the swelling adsorption-desorption experiment showed that N-acetylmorpholinyl polyoxyethylene methacrylate has the higher toluene/n-heptane solubility selectivity and the lower degree of swelling, in comparison with the commercial polyoxyethylene methacrylate macromonomers such as PEO500OHMA with hydroxyl group and MePEO500MA with methoxy group. It could be concluded that N-acetylmorpholinyl polyoxyethylene methacrylate is an ideal grafting macromonomer for the preparation of aromatic/aliphatic pervaporation "pore-filling" composite membranes.

Funds：

国家重点研发计划项目（2017YFB0307600）；辽宁省“兴辽英才”项目科技创新领军人才（XLYC1802073）；大连市顶尖及领军人才项目（2019RD08）。

AuthorIntro：

周曼华（1995-），女，安徽铜陵人，硕士研究生，主要从事聚合物膜材料的研究

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