CAJ | 학술논문

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。
이이분갑동위광민제，통과자외광복조인발，장친수성단체병희산（AA）화갑기병희산（MAA）접지재취병희박막표면。고찰료광민제농도、복조시간이급용제류형대접지솔적영향。이용쇠감전반사홍외광보화소묘전자현미경대접지박막적표면화학조성화형모결구진행표정，통과수접촉각화흡수솔연구료접지후박막적친수성。결과표명，재상동조건하，AA적접지솔고우MAA；상비우유궤용제，재수용제중AA적접지솔명현제고；당접지솔체도11．8％시，박막표면수접촉각유원막적95°강저도35°，친수성현저제고。
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.