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Study on Modification of Cinnamic Acid-grafted Poly(vinylidene fluoride)
Authors: DI Yujing, ZHANG Xuejun, ZHAO Jintong
Units: College of Science, North University of China
KeyWords: Poly(vinylidene fluoride); Cinnamic acid; Grafted polymer; Membrane; Hydrophilicity
ClassificationCode:TQ 028. 8
year,volume(issue):pagination: 2011,31(1):47-50

Cinnamic acid (CA)-graft-poly(vinylidenefluoride) (PVDF) was synthesized using benzoyl peroxide (BPO) as initiator in a N,N-dimethylformamide (DMF) solution. FTIR spectroscopy, DSC, and TG analyses of the grafted polymers showed that the CA side chains were grafted onto the PVDF backbone. Contact angle measurements indicated that the contact angle of modified PVDF reduced from 88° to 54°. Microporous membranes were prepared from PVDF and the PVDF-g-P(CA) polymer with poly(vinyl pyrrolidone) (PVP) as the pore former by the tape
casting method. The morphology of the membranes was studied by scanning electron microscope (SEM). The membranes cast from the DMF solution of PVDF-g-P(CA) had a greater pore size distribution (600-700nm) and higher porosities than those of the pristine PVDF. The flux of the modified PVDF was 81 L/(m2•h), which increased by 16 L/(m2•h) over the pure PVDF.



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