Novel anion exchange membranes based on quaternized diblock copolystyrene containing a fluorinated hydrophobic block

doi:10.1016/j.memsci.2018.01.055

CORC > 化学研究所 > 中国科学院化学研究所

	Novel anion exchange membranes based on quaternized diblock copolystyrene containing a fluorinated hydrophobic block
	Zhu, Meng 1; Zhang, Xiaojuan 1; Wang, Yiguang 1; Wu, Yibo 2,5; Wang, Hao 2,5; Zhang, Min 2,5; Chen, Quan 4; Shen, Zichao 1; Li, Nanwen 3
刊名	JOURNAL OF MEMBRANE SCIENCE
	2018-05-15
卷号	554 页码:264-273
关键词	Diblock Copolymers Anion Exchange Membrane Phase Separation Fluorinated Alkaline Stability
ISSN号	0376-7388
DOI	10.1016/j.memsci.2018.01.055
英文摘要	With the aim to enhance the hydrophilic-hydrophobic separation and thus improve the anion conductivity of diblock copolymer anion exchange membranes (AEMs), a fluorinated hydrophobic block was introduced into quaternized diblock copolystyrene. Two fluoro-containing monomers (i.e., 4-fluorostyrene (4FS) and 2, 3, 4, 5, 6-pentafluorostyrene (PFS)) were polymerized into a poly(4-vinyl benzyl chloride)-based macroinitiator (Macro-PVBC263) via reversible addition-fragmentation chain transfer (RAFT) polymerization. This route led to the corresponding diblock copolymers PVBC263-b-P4FS(y) and PVBC263-b-PPFSy, which served to prepare AEMs (i.e., PVBC263-b-PPFSy-OH and PVBC263-b-P4FS(y)-OH, respectively) via quaternization with trimethyl amine (TMA) and subsequent ion-exchange. As expected, the as-obtained AEMs showed well-defined lamellar morphologies, as revealed by small-angle X-ray scattering (SAXS) and atomic force microscopy (AFM). Consequently, all the fluorinated diblock copolymer-based AEMs showed high anion conductivities. PVBC140-b-P4FS(38)-OH showed the highest hydroxide conductivity (86.1 mS/cm) with an ion exchange capacity (IEC) of 4.27 meq/g. Interestingly, despite its high IEC, PVBC263-b-P4FS(38)-OH showed a reasonable water uptake (WU) of 37.5% as a result of the presence of hydrophobic fluorinated block segments. Thus, proper ion conducting channels are believed to be built by facilitating hydrophilic-hydrophobic phase separation processes driven by the fluoro-substituted functionalities. Despite their high IEC values in terms of hydrophobicity, the WU and swelling ratio of the AEMs prepared herein did not increase significantly, especially at elevated temperatures. All the AEMs preserved over 86% of their initial hydroxide conductivity after 20 d of alkaline stability testing (1M aqueous NaOH) at 80 degrees C.
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000429188200027
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/45989]
专题	中国科学院化学研究所
通讯作者	Wang, Yiguang; Zhang, Min; Li, Nanwen
作者单位	1.Northwestern Polytech Univ, Sci & Technol Thermostruct Composite Mat Lab, Xian 710072, Shaanxi, Peoples R China 2.Beijing Inst Petrochem Technol, Coll Mat Sci & Engn, Beijing 102617, Peoples R China 3.Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China 4.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Jilin, Peoples R China 5.Beijing Key Lab Special Elastomer Composite Mat, Beijing 102617, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Meng,Zhang, Xiaojuan,Wang, Yiguang,et al. Novel anion exchange membranes based on quaternized diblock copolystyrene containing a fluorinated hydrophobic block[J]. JOURNAL OF MEMBRANE SCIENCE,2018,554:264-273.
APA	Zhu, Meng.,Zhang, Xiaojuan.,Wang, Yiguang.,Wu, Yibo.,Wang, Hao.,...&Li, Nanwen.(2018).Novel anion exchange membranes based on quaternized diblock copolystyrene containing a fluorinated hydrophobic block.JOURNAL OF MEMBRANE SCIENCE,554,264-273.
MLA	Zhu, Meng,et al."Novel anion exchange membranes based on quaternized diblock copolystyrene containing a fluorinated hydrophobic block".JOURNAL OF MEMBRANE SCIENCE 554(2018):264-273.