| Summary: | 碩士 === 國立中央大學 === 化學工程與材料工程研究所 === 95 === The greatest obstacle of organic-light-emitting-diode (OLED) today is moisture prevention. Packaging OLED with multiple layers of organic or metal films can increase diffusion path and decrease mass transfer area, and thereby decrease permeability of moisture. However, it is not sufficient to block the moisture penetration yet. Incorporation of zeolite getter in the layers may prolong the lifetime of OLED, which is the main objective of this research. To achieve this objective, our work is divided into three parts: the synthesis of nano-zeolite beta, template removal by oxidative decomposition at low temperature, and surface modification for the incorporation into hybrid hard coat sol.
Based on our experiences on the synthesis of MFI zeolite, the zeolite beta precursor is first concentrated and aged at <100 oC prior to hydrothermal treatment. The formation of zeolite from precursor and its aggregation and growth was monitored to understand the kinetics, based on which the final zeolite particle size could be controlled.
To avoid the aggregation of the nano-zeolite obtained upon calcination, low temperature detemplate by Fenton’s reagent was attempted. With this, we successfully produced detemplated nano-size zeolite beta that was still fully dispersible in water. The next step will be to modify the surface of these zeolite particles so that they are chemically compatible with an organic solvent, upon which they could be blended in a hard coating recipe and coated on the flexible substrate.
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