Preparation and properties on poly(phthalazinone ether sulfone)containing pendant sodium benzenesulfonate group nanofiltration membrane
Poly(phthalazinone ether sulfone)containing pendant sodium benzenesulfonate group(SPPES-P-Na)was prepared by immersing poly(phthalazinone ether sulfone)containing pendant benzenesulfonic acid group in sodium chloride solution;poly(phthalazinone ether sulfone)containing pendant benzenesulfonate group composite nanofiltration membranes were prepared by coating method.The effects of polymer concentration and heat treatment conditions on the performance of composite nanofiltration membranes were investigated.In this work,the water flux of SPPES-P-Na composite membrane was higher than that of SPPES-P-H composite membrane.When the mass fraction of SPPES-P-Na was 1.5％,the heat treatment temperature was 100 ℃,and the heat treatment time was 30 min,the flux reached 58.0 L/(m2·h),and the rejection was 89.0％.When the operating temperature was 95 ℃,the flux of the membrane was 205.0 L/(m2·h),and the rejection was 82.0％,which showed a better thermal resistance.The composite membrane was immersed in 0.2 g/L NaClO solution for 10 days,with no obvious change in performance and good chlorine resistance.
poly(phthalazinone ether sulfone)containing pendant benzenesulfonic acid groupcomposite membranenanofiltration membrane
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