Synthesis and Characterization of Cinnamic Acid-Grafted Poly(Vinylidene Fluoride) Microporous Membranes
- 作者：Xuejun Zhang ; zhangxuejun@nuc.edu.cn ; Huan Meng ; Yujing Di
- 关键词：Poly (vinylidene fluoride) ; Cinnamic acid ; Graft- ed polymer ; Membrane ; Hydrophilicity
- 刊名：Energy Procedia
- 出版年：2012
- 期刊代码：P136_18766102
- 类别：pw
- 出版时间：2012
- 卷：17
- 期：Complete
- 页码：1850-1857
- 文件大小：407 K
摘要
Cinnamic acid (CA)-graft-poly (vinylidenefluoride) (PVDF) was synthesized via free radical polymerization using benzoyl peroxide (BPO) as initiator in a N,N-dimethylforma- mide (DMF) solution. FTIR spectroscopy, DSC, and TG analyses of the grafted polymers showed that the CA side chains were successfully grafted onto the PVDF backbone. Contact angle measurements indicated that the modified PVDF showed better hydrophilicity than the unmodified PVDF. Microporous membranes were prepared from the PVDF-g-P (CA) polymer with poly (vinyl pyrrolidone) (PVP) as the pore former through the phase inversion technique. The morphology of the membranes was studied by scanning electron microscope (SEM). The membrane cast from the DMF solution of PVDF-g-P (CA) had a greater pore size distribution and higher porosities than those of the pristine PVDF. The membrane prepared using the modified PVDF showed a higher flux than the unmodified PVDF membrane.