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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/44209

    Title: Synthesis and Optical Properties of Soluble Polyimide/Titania Hybrid Thin Films
    Authors: Chang, Chih-ming;Chang, Cheng-liang;Chang, Chao-ching
    Contributors: 淡江大學化學工程與材料工程學系
    Keywords: high refractive index;polyimide-titania hybrid thin films;sol-gel reaction;soluble polyimide
    Date: 2006-12-08
    Issue Date: 2010-03-09 10:02:56 (UTC+8)
    Publisher: Wiley - V C H Verlag GmbH & Co. KGaA
    Abstract: In this study high-refractive-index polyimide/titania hybrid optical thin films were successfully prepared using a sol-gel process combined with spin coating and multistep baking. The hybrid thin films were prepared from a soluble polyimide, a coupling agent, and a titania precursor. Transparent hybrid thin films can be obtained at TiO2 content as high as 40 wt.-%. The FE-SEM results suggest that the TiO2 particles in the hybrid thin films have diameters in the nanometer range. The thermal decomposition temperatures of the prepared hybrid materials are above those of the respective polyimide except for the highest TiO2 content hybrids. The refractive indices at 633 nm of the prepared hybrid thin films increase linearly from 1.66 to 1.82 with increasing TiO2 content. The excellent optical transparency, thermal stability, and tunable refractive index provide the potentials of the polyimide/titania hybrid thin films in optical applications.
    Relation: Macromolecular Materials and Engineering 291(12), pp.1521-1528
    DOI: 10.1002/mame.200600244
    Appears in Collections:[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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