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采用溶胶-凝胶技术,以4,4’-(六氟异丙基)-苯二酸酐(6FDA)、5,5’-(六氟异丙基)-二-(2-氨基苯酚)(6FHP)、非线性生色分子4-(N-2-羟乙基-N-甲基氨)-4’-[(6-硝基苯并噻唑-2-取代)二氮烯基偶氮苯(HNBDA)、偶联剂γ-氨丙基三乙氧基硅烷(APTES)和正硅酸乙酯(TEOS)水解液合成了系列的聚酰亚胺/SiO2杂化材料,其中TEOS的含量为0～22.5%。采用红外、热分析、扫描电镜、透射电镜和X射线衍射等进行表征。它们的玻璃化转变温度和热分解温度分别为216～366℃和321～438℃,表明具有较好的热稳定性。测定极化后材料832nm处的电光系数γ33为21～35pm/V,且电光系数保持其初始值的85%以上(100h),结果表明杂化材料在光器件上具有潜在的应用。
The sol-gel technique was used to synthesize 4,4 ’- (hexafluoroisopropyl) phthalic anhydride (6FDA), 5,5’ - (hexafluoroisopropyl) -bis- 6FHP), a non-linear chromogenic molecule 4- (N-2-hydroxyethyl-N-methylamino) -4 ’- [(6-nitrobenzothiazole-2-substituted) diazenyl azobenzene (HNBDA), coupling agent γ-aminopropyl triethoxysilane (APTES) and tetraethyl orthosilicate (TEOS) hydrolyzate, a series of polyimide / SiO2 hybrid materials were synthesized. The content of TEOS was 0 ~ 22.5%. Infrared, thermal analysis, scanning electron microscopy, transmission electron microscopy and X-ray diffraction were used to characterize. Their glass transition temperature and thermal decomposition temperature are 216 ~ 366 ℃ and 321 ~ 438 ℃, respectively, indicating that they have good thermal stability. After the polarization measurement, the electro-optic coefficient γ33 at 832nm was 21-35pm / V, and the electro-optic coefficient remained above 85% (100h) of its initial value. The results showed that the hybrid material has potential application in optical devices.