Thermo-sensitive PVDF-g-PNIPAM Membrane Preparation via Grafting Copolymerization Method
Chen Ren-ju · Xiandai shipin keji · 2013
Carry out the research of preparation process of temperature-responding polyvinylidene fluoride(PVDF) composite intelligent membrane by grafting copolymerization method.PNIPAM monomer is grafted onto the PVDF-based membrane by alkali modification method in order to prepare composite intelligent film that having temperature response characteristic.With the determination of the lower critical temperature(LCST),pure water flux,retention and other indicators,it figure out that how the different cross-linking concentration,the temperature of the cross-linking reaction,grafting rate influence the temperature response performance of membrane.And infrared spectral analysis results confirmed that thermo-sensitive group PNIPAM has been grafted onto PVDF membrane.Experimental results showed that the optimum technological conditions are: crosslinking agent(MBAA) concentration 0.02 mol/L,grafting rate 7%,cross-linking reaction temperature 50 ℃～60 ℃.The results also showed that the compound membrane had good resistance to polluting and temperature response performance.