膜科学与技术

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Fabricating defect-free organic solvent nanofiltration
membrane based on Dopa thin-walled microcapsules

Authors： Shi Fei, Li Hongying, Li Yifan

Units： School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001

KeyWords： Thin film composite membrane; Interface resistance; Thin-walled microcapsules; Organic solvent nanofiltration.

ClassificationCode：TQ 028.8

year,volume(issue):pagination： 2021,41(6):85-94

Abstract：

Thin film composite membrane (TFCM) has a wide range of applications in the separation of low molecular weight systems due to its high separation performance. However, the near surface area of the support layer often suffers from a resistance concentration area during its preparation process, which reduces the separation performance of the membrane. Based on this, this work has prepared flexible two-dimensional Dopa thin-walled microcapsules, which was assembled on the support to prepare a film. And the flexibility of the microcapsules allows it to be assembled without defects. This method can reduce the additional resistance in the interface area of film by using mesoscopic organic constructor. The Dopa composite membrane exhibits good performance for organic solvent nanofiltration, and its methanol permeance reaches 440 L m-2 h-1 bar-1 with the retention of dye molecules which larger than 2 nm more than 95%. At the same time, the Dopa composite membrane shows good operational stability. This method paves a new way for the preparation of defect-free TFCM.

Funds：

国家自然科学基金（21878277，21506196）。

AuthorIntro：

时飞（1996-），男，山东省菏泽市人，硕士研究生，主要研究方向为膜分离技术，E-mail 1591448684@qq.com

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