摘要
以过氧化对苯二甲酰(BPO)为引发剂,3-苯基丙烯酸为单体,在N,N-二甲基甲酰胺溶液中引发接枝聚合,制得接枝3-苯基丙烯酸的聚偏氟乙烯.通过红外测试、差示扫描量热仪以及热失重分析表明3-苯基丙烯酸(CA)接枝到PVDF骨架上.通过接触角测试,发现改性后的聚偏氟乙烯(PVDF—g—P(CA))的接触角由88°降低到54°.以聚乙烯吡咯烷酮(PVP)为致孔剂,分别以PVDF和改性后的PVDF-g-P(CA)为原料,采用流延法制备聚偏氟乙烯膜.通过扫描电子显微镜(SEM)观测了PVDF膜改性前后的表面形貌,测试接枝前后PVDF膜纯水通量.结果表明,PVDF—g—P(CA)膜的孔径在600~700nm之间,孔径分布较均匀,纯水通量为81L/(m2·h),比PVDF膜的水通量增加了16L/(m2·h).
Cinnamic acid (CA)-graft-poly(vinylidenefluoride) (PVDF) was synthesized using benzoyl per- oxide (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. Mi croporous membranes were prepared from PVDF and the PVDF-g-P(CA) polymer with poly(vinyl pyrroli- done) (PVP) as the pore former by the tape casting method. The morphology of the membranes was stud- ied by scanning electron microscope (SEM). The membranes cast from the DMF solution of PVDF-g-P (CA) had a greater pore size distribution (600~700 nm) 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.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2011年第1期47-50,76,共5页
Membrane Science and Technology
基金
山西省高校科技研究开发项目(200611027)
关键词
聚偏氟乙烯
3-苯基丙烯酸
接枝聚合物
膜
亲水性
poly(vinylidene fluoride)
cinnamic acid
grafted polymer
membrane
hydrophilicity