Research on poly(ethylene-co-vinylcohol) membrane modified by multi-block polyether for oil/water separation
Yuping Sun · Applied Chemical Industry · 2013
Multi-block copolymer(K-F127) with head to head structural unit was prepared from chain extension reaction of isophorone diisocyanate(IPDI) and pluronic F127.The blend membranes of F127/EVAL and K-F127/EVAL were obtained from mixing the F127 and K-F127 with EVAL membrane respectively and then used to separate the oil/water emulsion.Effect of the addition of F127 and K-F127 on oil/water separation performance of membrane were compared.The results indicated that the molecular weight of K-F127 was 2 times higher than F127;the mechanical strength,hydrophilicity and anti-fouling performance were significantly improved but there were no obvious effects on the morphology of blend membranes with addition of F127 and K-F127.The effects in increasing the hydrophilicity and permeability of EVAL membrane were better by adding K-F127 than the F127 because of the increasing molecular weight of K-F127.