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Preparation and Process Optimization of Monovalent Selective Cation Exchange Membrane

Authors： ZHANG Yingong，LI Fuqin，ZHU Min，LI Jiabin

Units： College of Energy and Environmental Engineering, Hebei University of Engineering, Handan 056038, China

KeyWords： pyrrole; impregnation surface modification; homogeneous cation exchange membrane; monovalent selective cation exchange membrane; selective separation performance

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2021,41(1):57-63

Abstract：

Using pyrrole as the modification material and surface impregnation as the modification method, the monovalent selective cation exchange membranes are prepared by modifying the ordinary homogeneous cation exchange membrane. The influence of different factors on the separation performance of the membranes is studied by the electrodialysis experiment, thereby optimizing the membrane preparation conditions. Under the optimal preparation conditions, the surface characterization and basic properties of the modified membrane are tested. The results show that the optimum condition of membrane preparation is determined as follows: the impregnation temperature is 40℃, the impregnation time is 6 hours, the pyrrole concentration is 0.2mol/L, the oxidant concentration and type is 0.8mol/L FeCl3；the surface of modified membrane is smoother, the ion exchange capacity, water content and swelling degree are 0.78mmol/g, 17.3% and 8.5%; the leakage rate of Ca2+ is only 7.7%, the transmission rate of Na+ is 60.3%, and the selective permeability coefficient is 7.8, It has excellent ion selective separation performance.

Funds：

河北省重点研发计划项目（19213602D）

AuthorIntro：

张引弓（1994-），男，河北省唐山市人，在读硕士研究生，研究方向为膜分离理论与技术，E-mail：1028271666@qq.com，

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