目前有機發光二極體顯示器面臨之最大困難是阻絕水氣，即使以有機及金屬多層膜增加質傳路徑或降低質傳面積，效果仍有限。乃構思額外添加沸石吸水劑作為彌補以延長其壽命。本研究工作共分為奈米沸石製作、低溫去除模板及表面改質三個階段。希望能將沸石混入有機硬膜塗料中，塗布在軟質基板上，降低水氣對發光元件的耗損。 合成奈米BEA沸石將延用過去合成MFI的經驗，在水熱前先經過濃縮操作，以加速前驅物之一次粒子聚集成沸石晶核，並且能窄化粒徑分佈。老化期間將再追蹤沸石粒子的成長過程和特性，並探討有/無濃縮操作的動力學，以製作整齊均一之beta沸石奈米結晶。另外，為了避免高溫鍛燒去除模板時候，引起粒子聚集，改用Fenton試劑之低溫氧化法去除模板。以上兩階段工作已完成，並開始進行奈米沸石表面改質，使得奈米沸石與有機溶劑相容，期許混入硬鍍膜配方，最後製作成具有吸水能力之透明膜。 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.
