Preparation and Characterization of A Functional Polysulfone Anion Exchange Membrane of Polyethylene Glycol Modified Crown Ether
In order to achieve high ionic conductivity and good alkaline resistance of Polysulfone-based AEMs,chloromethylated polysulfone was prepared by green method,and crown ether-functionalized polysulfone membranes with different triethylamine and amino crown ether contents were then prepared using amino crown ether as cross-linking agent and metal ions and triethylamine as cationic groups followed by crown ether functional polysulfone membrane with triethylamine and triethylamine as cationic groups(PSF-CEX-QA1-X).The effect of the addition of polyethylene glycol on the membrane properties was explored by introducing the low molecular weight polyethylene glycol(PEG)into the above polysulfone cross-linking membrane.The results shown that the presence of hydrophilic polyethylene glycol helps to facilitate the formation of ordered ion channels in the membrane.The conductivity and alkali-resistant stability of PSF-CEX-QA1-X-PEG were improved compared to PSF-CEX-QA1-X membrane.Among them,the electrical conductivity of PSF-CE0.1-QA0.9-PEG at 80℃is 56.78 mS/cm,which can retain 85%of the original conductivity after alkaline resistance test.In addition,PSF-CEX-QA1-X-PEG has good dimensional and thermal stability.
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