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.
参考文献
| [1] | 姚瑜,张军,王晓琳,徐建海.聚丙烯亲水性改性[J].化工进展,2005(09):1020-1023. |
| [2] | Jianping Deng;Lifu Wang;Lianying Liu .Developments and new applications of UV-induced surface graft polymerizations[J].Progress in Polymer Science,2009(2):156-193. |
| [3] | Dongming He;Heru Susanto;Mathias Ulbricht .Photo-irradiation for preparation,modification and stimulation of polymeric membranes[J].Progress in Polymer Science,2009(1):62-98. |
| [4] | Bin Li;Wenguang Chen;Xiaohua Liu;Xiaogong Wang;Qixing Zhou .Preparation of temperature-sensitive polymer films by surface photografting techniques[J].Polymers for advanced technologies,2002(3/4):239-241. |
| [5] | Yamada K;Takeda S;Hirata M .Improvement of autohesive and adhesive properties of polyethylene plates by photografting with glycidyl methacrylate[J].Journal of Applied Polymer Science,2007(1):493-500. |
| [6] | Yamada K.;Kimura J.;Hirata M. .Autohesive properties of polyolefins photografted with hydrophilic monomers[J].Journal of Applied Polymer Science,2003(14):2244-2252. |
| [7] | Xing CM;Deng JP;Yang WT .Synthesis of antibacterial polypropylene film with surface immobilized polyvinylpyrrolidone-iodine complex[J].Journal of Applied Polymer Science,2005(5):2026-2031. |
| [8] | Ma ZW.;Gao CY.;Juan J.;Ji J.;Gong YH.;Shen JC. .Surface modification of poly-L-lactide by photografting of hydrophilic polymers towards improving its hydrophilicity[J].Journal of Applied Polymer Science,2002(10):2163-2171. |
| [9] | 潘祖仁.高分子化学[M].北京:化学工业出版社,1997 |
| [10] | Yu H;Cao Y;Kang G et al.Enhancing antifouling property of polysulfone ultrafiltration membrane by grafting zwitterionic copolymer via UV initiated poly- merization[J].Journal of Membrane Science,2009,342(01):6-13. |
| [11] | 李绍宁,魏俊富,赵孔银,张环,姜智广,孙世军,王小雪.聚丙烯接枝丙烯酸丁酯吸油纤维的制备和表征[J].功能材料,2011(z3):559-561. |
| [12] | Yang W;Rfinby B .Bulk surface photografting process and its applications.II.Principal factors affecting sur- face photografting[J].Journal of Applied Polymer Sci- ence,1996,62(03):545-555. |
| [13] | Kubota H;Ogiwara Y .Effect of water in vapor-phase photografting of vinyl monomers on polymer films[J].Journal of Applied Polymer Science,1991,43(05):1001-1005. |
| [14] | 王磊,魏俊富,赵孔银,张环,王晓磊.紫外辐射改性聚乙烯膜的亲水性研究[J].天津工业大学学报,2011(02):23-26. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%