纳米TiO_2与MMA电子辐射接枝

ELECTRON-RADIATION-INDUCED GRAFT OF MMA ON NANO-TiO_2 SURFACE

锐钛矿和金红石型纳米TiO2(A-TiO2和R-TiO2)分别与甲基丙烯酸甲酯(MMA)在空气中进行电子束共辐射接枝聚合,结果表明A-TiO2接枝率(10.5%)高于R-TiO2(6.1%),被认为是由于A-TiO2具有较高的比表面积造成的。红外光谱测试结果表明,辐射后两种材料分别在1724cm-1(A)和1725cm-1(R)位置出现了一个羰基伸缩振动吸收峰。XPS分析进一步证实了羰基的存在。以上结果表明在纳米锐钛矿和金红石TiO2成功接枝上了MMA。

Electron beam coirradiation induced graft polymerization has been carried out in air between methyl methacrylate (MMA) and anataseand rutileTiO2 nanoparticles, respectively. The results show that the grafting yield of ATiO2 (10.5%) is larger than that of RTiO2 (6.1%), owing to its high specific surface area. In the FTIR spectra of irradiation samples, there is a new absorption peak appeared at 1724 cm-1 (A) and 1725 cm-1 (R), respectively, which is attributed to carbonyl stretching. Xray photoelectron spectroscopy (XPS) measurements confirm further the existence of carbonyl. These results show that MMA is successfully grafted on nanoTiO2 surface.