本研究係探討以溶劑揮發法製備油性聚氨酯(PU)包覆正二十烷(n-Eicosane)及正二十二烷(n-Docosane)混合相轉移材料微膠囊，並且嘗試在極端溫度(約135℃、-5℃)下混和處理正烷類相轉移材料藉以改變烷類之吸放熱溫度，並觀察其成形性、粒徑以及吸放熱表現與再現性測試。實驗結果顯示微膠囊具有平整光滑之表面且成形性良好，在製備條件1000 rpm 下所製得之微膠囊的平均粒徑為55.262±1.313μm。經混和改質後之正烷類由測試可得知，正二十烷及正二十二烷之混和比例以2:1 具最佳效果，起始吸熱溫度從原本36.18℃及43.00℃變為39.76℃，確實達到混和之目的。混合後之正烷類再經PU 包覆，測得PU/正烷類微膠囊依然擁有良好之吸放熱性質，並未因經包覆而改變。
In this study, oil-based polyurethane microcapsules containing n-Eicosane and n-Docosane phase change material were prepared by solvent evaporation method, In order to investigate the thermal properties the core material was treated with extreme conditions. The obtained PU microcapsules were observed with the scanning electron microscope (SEM) and the thermal properties were examined with Differential Scanning Calorimetry (DSC). The results indicated that, the microcapsules were well formed solvent evaporation method observed by SEM. And the average particle size of PU microcapsules were 55.262 ± 1.313 stirred at conditions of 1000 rpm. The thermal properties could be changed by extreme conditions on core material of phase change material. Test can be to know by mixing modified after alkanes, n-Eicosane are n-Docosane mixing ratio of 2:1 with the best results, start endothermic temperature from the original 36.18 ℃ and 43.00 ℃ to 39.76 ℃has certainly achieved the purpose of mixing. Mixture of alkanes by PU coated, measured PU/alkanes microcapsule still have good thermal properties, has not been coated by the change.
