Polyepichlorohydrin (PECH) is a linear polymer

with good stability and membrane-forming properties

and the use of polyepichlorohydrin (PECH) polymer as a matrix to prepare anion exchange membrane

which can avoid the use of carcinogenic substances chloromethyl ether

and dicyclopentyl ether. However

the prepared membrane with PECH as matrix has the disadvantages of poor mechanical strength and high water absorption

which limits its wide application in electrodialysis technology. Crosslinking reaction with PECH was carried out by using polyethyleneimine (PEI) as crosslinking agent

and a network structure is formed therein to limit the excessive swelling of the polymer membrane in water

thus to enhance the mechanical strength of the membrane

and introduction of nylon mesh to further improve the mechanical properties of the membrane. In the present work

the QCPECH/nylon composite anion exchange membrane was prepared. The effects of water uptake

swelling degree

ion exchange capacity

mechanical strength

membrane resistance and desalination on the composite anion exchange membrane were investigated. The results showed that the desalination efficiency (94.8%) of the prepared P1 membrane is higher than that of the commercial membrane (92.4%). It can be seen that the composite anion exchange membrane made of PECH/nylon crosslinked with PEI has the potential for development in electrodialysis desalination.