PVDF膜表面自由基引发接枝两性离子聚合物的研究  

Free-radical initiated grafting zwitterionic polymer onto PVDF membrane

作　　者：李建华[1] 李弥滋[1] 张其清[1,2] 许小平[1] 

机构地区：[1]福州大学生物和医药技术研究院化学化工学院,福建福州350002 [2]中国医学科学院北京协和医学院生物医学工程研究所天津市生物医学材料重点实验室,天津300192

出　　处：《功能材料》2012年第13期1748-1751,共4页Journal of Functional Materials

基　　金：福建省自然科学基金资助项目(2011J01044);福州大学科技发展基金资助项目(2010-XQ-17;022284)

摘　　要：利用AIBN和PVDF都溶于强极性溶剂的性质,制备含有AIBN的PVDF原膜。在温和的条件下,AIBN加热产生自由基能够有效地引发接枝两性离子聚合物PSBMA到PVDF膜上。膜表面的化学组成用傅里叶全反射红外光谱(FT-IR/ATR)进行表征,场发射电镜(FESEM)用于观察膜表面的形态。当PSBMA的接枝率为13.8%时,膜的接触角由原膜的85°下降到62°,这说明接枝PSBMA大大提高了膜的亲水性。静态吸附实验可以得出PVDF-g-PSBMA膜的抗蛋白质污染的性能得到了显著的提高。在500μg/mL BSA浓度下,蛋白质吸附量由M1的130μg/cm2下降到M4的50μg/cm2。The original PVDF membrane containing AIBN was prepared because that the AIBN and PVDF can be all dissolved in strong polar solvent. In facile condition, the free radical generating from heating the AIBN can initiate grafting polymerization of zwitterionic polymer PSBMA onto PVDF membrane. The chemical composi- tion of the membrane surface was characterized by attenuated total reflectance/Fourier transform infrared spec troscopy （FT-IR-ATR）. The field emitting scanning electronic microscopy was conducted to observe the mem- brane morphology. The hydrophilicity of PVDF membranes after grafting PSBMA has improved significantly from the contact angle results, the contact angle of PVDF-g-PSBMA membrane was declined to 62° with the grafted yield of 13.8%. By BSA static absorbed experiment, the anti-fouling properties of modified membrane have enhanced remarkable compared to original membrane.

关 键 词：自由基 抗污染 亲水性 PVDF膜 

分 类 号：O636[理学—高分子化学] TQ028.8[理学—化学]