摘要
本文結合油/水乳液系統製備有機殼層微膠囊的方法以及水/油乳液系統製備無機殼層微膠囊的方法，以油/水/油乳化系統製備有機/無機混成殼層微膠囊包覆相變物質。內部油相為所包覆的相變物質(正十五碳烷)，中間水相則是包含有形成殼層的尿素甲醛樹脂預聚物與TEOS所形成的無機前趨物以及水相界面活性劑Tween 20，外部油相則包含有正十碳醇與TEOS以及油相界面活性劑Span 80。文中並探討水相界面活性劑Tween 20與高分子預聚物的濃度對油/水/油乳化系統的穩定性以及製備的有機、無機與有機/無機混成殼層微膠囊粒徑、包覆量及產量的影響。油/水/油乳液穩定性方面利用光學顯微鏡觀察其分層的時間以進行討論，而所製備之微膠囊方面則是利用光學顯微鏡量測粒徑、FTIR進行成份分析以及DSC量測包覆量進行討論。另外利用利用SEM照片與有機/無機比例進行混成殼層的形式與狀態方面的探討。
藉由改變水相界面活性劑與有機預聚物的濃度，可以成功的製備出有機/無機混成殼層微膠囊包覆相變物質，微膠囊的粒徑由400μm至1000μm不等，包覆量則是由40%~80%，產量則是由8克~11克不等。所製得微膠囊經由傅立葉轉換紅外線光譜儀(FTIR) 進行結構鑑定，並以DSC熱物理性的觀測，驗證油/水/油乳化系統能完整包覆相變物質，且其殼層為有機/無機混成結構。而有機/無機混成殼層微膠囊的殼層狀態分為兩種，一種為無機殼層在內層包覆相變物質，有機殼層覆蓋在外層形成。第二種為有機殼層先行形成，而無機殼層在有機結構空隙中形成。

ABSTRACT
Preparation microcapsules of organic shell in O/W emulsion and inorganic shell in W/O emulsion, we use the O/W/O multiple emulsions to prepare microcapsules of hybrid shell which encapsulate phase-change material. In O/W/O emulsions, the phase-change material(pentadecane) was emulsified as an internal oil phase in a aqueous solution of organic prepolymer, inorganic precursor and Tween 20 prior to emulsification into an external oil phase. In this study, we discuss not only the concentration of Tween 20 and organic prepolymer about stability of O/W/O emulsions but also preparation of organic, inorganic and hybrid microcapsules of particle size, yield and encapsulation. Stability of O/W/O emulsion and particle size observe by microscope. FTIR analyzes microcapsules and DSC measures encapsulation of microcapsules. We observe pictures of SEM to discuss the types and situation of hybrid shell.
To change the concentration of Tween 20 and organic prepolymer, we can successful to prepare microcapsules of hybrid shell which encapsulate phase-change materials. Particle size is from 400μm to 1000μm. Encapsulation is from 40% to 80% and yield is from 8g to 11g. The microcapsules that we prepared measure by FTIR and DSC to prove O/W/O emulsions which can encapsulate phase-change materials and the shell forms by hybrid. There are two types of hybrid shell. One is inner shell formed by inorganic and outer shell formed by organic. The others is to form organic shell first and inorganic shell forms in organic gaps.

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