Citation: Lei Xiong, Yuan-Fang Hu, Zi-Gui Zheng, Zai-Lai Xie, Dong-Yang Chen. Chloromethylation and Quaternization of Poly(aryl ether ketone sulfone)s with Clustered Electron-rich Phenyl Groups for Anion Exchange Membranes[J]. Chinese Journal of Polymer Science, ;2020, 38(3): 278-287. doi: 10.1007/s10118-020-2340-y shu

Chloromethylation and Quaternization of Poly(aryl ether ketone sulfone)s with Clustered Electron-rich Phenyl Groups for Anion Exchange Membranes

a.
College of Materials Science and Engineering, Fuzhou University, Fuzhou 350116, China
b.
College of Chemistry, Fuzhou University, Fuzhou 350116, China

Corresponding author: Zai-Lai Xie, zlxie@fzu.edu.cn Dong-Yang Chen, dongyang.chen@fzu.edu.cn
Received Date: 6 June 2019
Revised Date: 5 July 2019
Available Online: 11 October 2019

Ion segregation is critically important for achieving high ion conductivity for anion exchange membranes (AEMs). Herein, a new bisphenol monomer bearing ten electron-rich phenyl groups was designed and polymerized with various amounts of electron-deficient 4,4′-dihydroxydiphenylsulfone and 4,4′-difluorobenzophenone to yield dense and selective reaction sites for chloromethylation and quaternization. As the most challenging step, chloromethylation was optimized by tuning the reaction temperature, reaction time, and reactant ratios. Ion exchange capacity, water uptake, anion conductivity, mechanical stability, and alkaline stability of the resulting AEMs were characterized in detail. It is found that chloromethylation reaction needed to be carried out at low equivalent of chloromethylation agents to avoid undesirable crosslinking. The QA-PAEKS-20 sample with an IEC of 1.19 mmol·g⁻¹ exhibited a Cl^– conductivity of 11.2 mS·cm⁻¹ and a water uptake of 30.2% at 80 °C, which are promising for AEM applications.
- Anion exchange membrane,
- Chloromethylation,
- Poly(aryl ether),
- Ion-segregation,
- Anion conductivity
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