丙烯酸酯紫外光固化材料表面的XPS研究  

XPS Study of the Surface of UV Cured Acrylates

作　　者：骆燕[1] 王德海[1] 蔡延庆[1] 

机构地区：[1]浙江工业大学化学工程与材料学院,浙江杭州310014

出　　处：《感光科学与光化学》2006年第6期428-435,共8页Photographic Science and Photochemistry

基　　金：浙江省自然科学基金资助项目(Z503236).

摘　　要：分别在不同的固化氛围(空气和氮气)下对配方相同的双酚A环氧丙烯酸树脂进行紫外光固化,得到了具有不同表面能的固化膜.利用X射线光电子能谱(XPS),在不同的掠射角(60°和90°)下表征了固化膜样品的元素组成、电子结合能、相对含量以及表面官能团类型.结果表明:不同的固化环境会导致材料表面能的差异.与空气下固化的材料相比,氮气下固化的材料表面C1s和O1s原子的结合能均向低结合能方向位移,且低结合能的C—C/C—H含量大于前者的含量,而相对高结合能的CO和C—O含量均小于前者.在空气下固化时,其表面高结合能的单键氧含量大于氮气下固化的材料表面.材料表面与基材所形成的界面间的原子结合能以及原子各种结合状态的相对含量也不同.如在氮气下固化时,材料表面C1s原子的结合能为286.62eV,而玻璃界面的结合能为287.48eV,且两面中C1s和O1s原子5种结合状态的相对含量都有差异.材料自身组分在固化过程中的迁移,使固化膜中C1s和O1s的原子浓度由表及里存在一定的梯度分布.CO和C—O等基团含量从表面到本体逐渐增多,而C—C/C—H含量从表面到本体逐渐减少.The epoxy acrylate resins were UV cured under different atmospheres （air and N2） and characterized with X-ray photoelectron spectroscopy at two different take-off angles, namely 60°and 90°. The results obtained indicate that different curing environments result in the change of surface energy of the films. Compared with the film cured in the air, the binding energies of C1s and O1s on the surface of the film cured in N2 move to lower ones. The content of ↓-C-C/↓-C-H is higher than that cured in the air, whereas the contents of ↓-C=O and ↓-C-O are lower in both cases. As for the film cured in the air, the content of the single-bond oxygen with high binding energy is higher than that cured in N2. Both the binding energy of C1s and O1s and the atomic contents are different between the surface and substrate interface of the films. For example, the binding energy of C1s on the surface and glass interface of the film cured in N2 are 286.62 eV and 287.48 eV, respectively. Besides, the atomic concentration in the films presents gradient distribution from the most external surface toward the bulk. The contents of ↓-C-O and ↓-C-O increase from surface to bulk, and the content of ↓-C-C/↓-C-H decreases from surface to bulk, which is caused by the migration of the compositions during the curing process.

关 键 词：表面能 XPS 结合能 原子浓度 

分 类 号：TB34[一般工业技术—材料科学与工程]