更新时间：01-07 （雨橙）提供原创文章
摘要：在玻璃表面固定一层γ-基丙基三乙氧基硅烷(KH-550)，利用KH-550上的胺和二苯甲酮(BP)构成光诱导氧化还原引发体系在玻璃表面光引发自由基接枝聚合，以达到玻璃表面改性的目的。在玻璃表面引发了丙烯酸类、丙烯酰胺类、两性离子单体的接枝聚合。通过衰减全反射红外法(ATR-FTIR)、接触角、原子力显微镜(AFM)等表征手段证明玻璃表面成功地接枝上了聚合物。玻璃表面光引发自由基聚合的过程很迅速，一般5min内即可完成。再以DMAAm为模型，详细对其进行研究。当原料配比m(BP):m(DMAAm):m(Acetone)=5:100:1000,反应时间为5min时，样品的接枝率和单位面积接枝量分别达到了3.30‰和0.87mg/cm2，表面形貌也发生了明显的变化。在各种接枝用的单体中N,N-二甲基丙烯酰胺(DMAAm)的接枝效果较为明显。研究引发剂的用量、单体的浓度、反应时间对其接枝率的影响。通过测试发现接枝了PDMAAm的玻璃表面与丙烯酸树脂间的粘结性能较好。
关键词：玻璃，紫外光诱导，氧化还原引发，接枝聚合，表面改性
Abstract：Deal glass with 3-aminopropyltriethoxysilane(KH-550) , the amino from KH-550 and benzophenone (BP) can form photoinduced redox system to initiate grafting from the glass surface, so that can achieve the purpose of glass surface modification. Initiate the radical polymerization of some monomers on glass surface, such as acrylates, acrylic acid amides, and zwitterionic monomers. Attenuated total reflection-Fourier transform infrared spectroscopy, contact angle measurement and atomic force microscope can be used to confirmed formation of the polymer on the glass substrate. Polymerization on the glass surface accomplished in a very short time, 5 minutes enough. Study detail in polymerization of DMAAm. m(BP):m(DMAAm):m(Acetone)=5:100:1000 can be used as suitable amount. The weight gain ratio and specific graft yield were 3.30‰ and 0.87mg/cm2. It can been observed obviously that the microstructure has changed. Poly (N,N-dimethylacrylamide) grafted glass has obvious effect. Study the influence of initiator concentration, monomer concentration, reaction time to the grafting degree. And the test show the good bonding performance between acrylic resin and the glass surface.
Key words: glass; UV photoinduced; redox initiate ; graft-from; surface modification