Preparation and Characterization of Highly Transparent Epoxy/Inorganic Nanoparticles Hybrid Optical Films

• Main Authors: Jao, Yu-Chuan, 饒育全
• Other Authors: Chien, Wen-Chen
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/03618445883252207051

碩士 === 明志科技大學 === 化學工程研究所 === 100 === In this study, the epoxy/titania (Epoxy/TiO2) hybrid materials were successfully prepared by sol-gel method. The effects of TiO2 content on the properties of hybrid material and the optimum operating conditions for preparing the hybrid films were also investigated. Fourier transform infrared spectrometry (FTIR) spectra showed that the bonding between the epoxy group and TiO2 has been successfully created. Besides, the cross-linking of Ti-O-Ti and Si-O-Ti network was also formed. Differential scanning calorimetry (DSC) analysis indicated that the glass transition temperature (Tg) and thermal stability of the hybrid materials increased with increase in TiO2 content. Thermogravimetry analysis (TGA) was informed that all of the prepared hybrid materials had an excellent thermal decomposition temperature (Td) of above 200oC. Field-emission scanning electron microscope (FE-SEM) and atomic force microscopy (AFM) images showed that the hybrid material had an excellence film-forming property and surface planarity. X-ray diffraction (XRD) analysis showed the titania in the hybrid material had a crystal phase of anatase. The n&k and UV-vis analysis showed that the transparency of hybrid thin films was over 90％ and the L.a.b color analysis indicated that the luminance was above 95% and no yellowing could be found. Further, the value of refractive index (at wavelength 633 nm) increased from 1.450 to 1.638 as TiO2 content increased from 0wt% to 50 wt%. At UV environment, the transparency of hybrid material was above 90 % and no yellowing could be found. In addition, the hybrid materials showed a very low hydroscopic property under a high-humidity environment.