Synthesis of Holographic Materials Based on Azobenzene –containing Epoxy and Its Optical Characterization

• Main Authors: Bo-An Li, 李柏鞍
• Other Authors: Wei-Hung Su
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/95c5ga

碩士 === 國立中山大學 === 材料與光電科學學系研究所 === 106 === Azobenzene molecules exhibit numerous photoresponsive features and the irradia- tion of azobenzenes with polarized light results in a fast and efficient photoselective isom- erization,accompanied by a chromophore motion and alignment.An azo chromophore (4- Aminoazobenzene, AAB) was selected as the photosensitive monomer.The functional epoxy used was ((3-Glycidyloxypropyl)trimethoxysilane, GPTMS).We have used ring opening reaction of GPTMS,AAB was employed instead of the component providing for the ring opening,whereas AAB become covalently bonded to GPTMS. In this study, We found that the reaction time of the Sol-Gel process played an key role to influence cross-linking degree of the GPTMS. Meanwhile, the reaction tempera- ture might change the degree of bonding between AAB and GPTMS (AG).The main goal is to achieve the efficient formation of (surface relief gratings, SRGs) and efficient Dif- fraction Efficiency. We found the optimal parameters to produce azobenzene holographic materials with efficient formation of SRGs and efficient Diffraction Efficiency.The Diffraction Effi- ciency of the composites AG was 30.87% and it could be achieved in 15 minutes. From the data measurement by Atom Force microscopy (AFM), it revealed the SRGs depth of AG were 40.8 nm.