Poly(alkyl-biphenyl pyridinium)anion exchange membranes with a hydrophobic side chain for mono-/divalent anion separation  

作　　者：Hongxin Yang Noor Ul Afsar Qian Chen Xiaolin Ge Xingya Li Liang Ge Tongwen Xu 

机构地区：[1]Anhui Provincial Engineering Laboratory of Functional Membrane Materials and Technology,Department of Applied Chemistry,School of Chemistry and Materials Science,University of Science and Technology of China,Hefei 230026,PR China [2]Applied Engineering Technology Research Center for Functional Membranes,Institute of Advanced Technology,University of Science and Technology of China,Hefei,230088,PR China

出　　处：《Industrial Chemistry & Materials》2023年第1期129-139,共11页工业化学与材料（英文）

基　　金：supported by the National Key Research and Development Program of China(No.2022YFB3805100);the National Natural Science Foundation of China(No.22222812 and 22178330);the Anhui Provincial Key Research and Development Plan(No.202104b11020030);the Natural Science Foundation of Anhui Province(No.2108085MB33).

摘　　要：A series of poly(alkyl-biphenyl pyridinium)anion exchange membranes(AEMs)with a hydrophobic side chain were prepared for mono-/divalent anion separation using electrodialysis(ED).A poly(alkyl-biphenyl pyridinium)polymer was synthesized via superacid-catalyzed polymerization,and then quaternization was conducted using Menshutkin reactions with 1-bromopentane.The obtained quaternized product had excellent solubility in common organic solvents,making it flexible to form homogeneous membranes by a solution casting method.The introduction of a hydrophobic side chain resulted in a microphase separation structure in the membrane,which is favorable to the active transport of Cl−(higher Cl−flux of up to 3.37 mol m−2 h−1 at a 10 mA cm−2 current density)compared with that of SO42−ions giving a high permselectivity of 11.9 in a mixed salt(NaCl/Na2SO4)system.In addition,the prepared membrane exhibited excellent alkaline stability in successive ED tests.It showed an OH−flux of up to 3.6 mol m−2 h−1 with a permselectivity of 361.2 between OH−and WO42−,which is much higher than that of Neosepta ACS membrane.The ED results manifest that the poly(alkyl-biphenyl pyridinium)AEMs can be promising candidates for practical mono-/divalent anion separation in industry.

关 键 词：Superacid-catalyzed polymerization Anion exchange membrane Mono-/divalent anion separation ELECTRODIALYSIS PERMSELECTIVITY 

分 类 号：O62[理学—有机化学]