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Effects of monoethanolamine and carbon dioxide on morphology and performance of polyamide thin-film composite membrane

Authors： LIU Weiliang，MA Xiaohua

Units： State Key Laboratory of Chemical Engineering, Membrane Science and Engineering R&D Laboratory, Chemical Engineering Research Center, East China University of Science and Technology, Shanghai 200237, China

KeyWords： membrane; carbon dioxide; interfacial polymerization; acid absorbent; monoethanolamine; desalination

ClassificationCode：TQ 316.4

year,volume(issue):pagination： 2020,40(6):1-6

Abstract：

Polyamide (PA) reverse osmosis (RO) thin-film composite (TFC) membranes dominate the market of RO membrane. The separation performance of the RO TFC membrane is mainly determined by the structure and property of the PA separation layer. In this paper, a nanofoaming method was used to adjust the micro-nano structure of the PA separation layer. By adding monoethanolamine (MEA) to the aqueous phase to adjust the solubility of carbon dioxide, the morphology of the PA separation layer was adjusted. The effect of the amount of MEA on the structure and performance of RO membrane was investigated. The surface morphology and separation performance of the RO membrane were characterized by scanning electron microscope, dynamic contact angle tester, fourier infrared spectroscopy and filtering experiments. The results showed that the addition of a certain amount of MEA can effectively change the surface morphology of the membrane, affect its surface properties and improve the separation performance.

Funds：

国家自然科学基金项目(21978081

AuthorIntro：

刘伟良（1995-），男，上海，硕士研究生，研究方向：反渗透膜的制备与改性，E-mail：bc1995lwl@foxmail.com

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