紫外光接枝改性聚丙烯薄膜的研究  

Study on modified polypropylene membrane induced by UV-irradiation grafting

作　　者：王翱[1,2] 魏俊富[1,2] 赵孔银[1,3] 李绍宁[1,3] 王晓磊[1,3] 王磊[1,2] 

机构地区：[1]天津工业大学中空纤维膜材料与膜过程教育部重点实验室,天津300387 [2]天津工业大学环境与化学工程学院,天津300387 [3]天津工业大学材料科学与工程学院,天津300387

出　　处：《功能材料》2012年第20期2851-2854,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51103102,51078264);天津市应用基础及前沿技术研究计划资助项目(09JCZDJC23200);天津市科技创新专项资金资助项目(10FDZDSW01500)

摘　　要：以二苯甲酮为光敏剂,通过紫外光辐照引发,将亲水性单体丙烯酸(AA)和甲基丙烯酸(MAA)接枝在聚丙烯薄膜表面。考察了光敏剂浓度、辐照时间以及溶剂类型对接枝率的影响。利用衰减全反射红外光谱和扫描电子显微镜对接枝薄膜的表面化学组成和形貌结构进行表征,通过水接触角和吸水率研究了接枝后薄膜的亲水性。结果表明,在相同条件下,AA的接枝率高于MAA;相比于有机溶剂,在水溶剂中AA的接枝率明显提高;当接枝率达到11.8%时,薄膜表面水接触角由原膜的95°降低到35°,亲水性显著提高。A new kind of hydrophilic membrane was prepared through grafting polymerization of acrylic acid（AA） and methacrylic acid （MAA） onto the surface of polypropylene （PP） membrane initiated by ultraviolet （UV）, using benzophenone as photosensitizer. The factors influenceing the grafting degree were discussed, such as the concentration of photosensitizer, irradiation time and solvent type. Attenuated total reflection-fou-rier transform infrared spectroscopy （ATR-FT-IR） and scanning electron microscopy （SEM） were used to char- acterize the chemical and morphological changes of the original and grafted PP membrane, the results indicated that acrylic acid was grafted onto the surface of PP membrane. Static contact angle measurements and water ab-sorption ratio were used to characterize the hydrophilic changes of the polypropylene membrane surface. In ad- dition, the grafting degree of AA was commonly higher than MAA under the same grafting conditons, further- more, the grafting degree of AA in water was obviously higher than that in organic solvent. The contact angle of grafted PP membrane decreased from 95° to 35° over a critical grafting degree of 11.8%, the hydrophilic ofPP membranes improved dramatically.

关 键 词：聚丙烯薄膜 紫外接枝 亲水性 接枝率 

分 类 号：TQ316.343[化学工程—高聚物工业]