利用複合凝聚法製備棕櫚油微膠囊相變化儲能材料

摘要全球暖化日益嚴重，再生能源逐漸取代傳統能源，但卻存在間歇及不穩定性的問題，因此相變化儲能材料成為近年來備受關注的研究方向。然而這些相關的研究大多以石蠟、單一脂肪酸、鹽水化合物等等做為儲能材料，較少人討論混合脂肪酸做為材料，相變材料結合微膠囊包覆技術的應用已存在許久，微膠囊包覆技術中複合凝聚法是常見且成熟的包覆技術，但以明膠、阿拉伯膠為殼層材料及以油相為芯材的鮮少被探討，而棕櫚油的包封更是第一次。因此本研究以複合凝聚法製備棕櫚油微膠囊儲能相變材料，探討製備過中影響微膠囊的形成條件，結果顯示在膠體濃度7%、pH=4.8、溫度5oC、交聯劑量12ml和轉速5000rpm為製備棕櫚油微膠囊之最佳參數，潛熱值15.33J/g和最佳熱轉換效能96.76%，證實實驗所生產之微膠囊有達到預期的功效。透過SEM拍攝膠囊表面狀態，可看到膠囊粒徑約為7~15μm之間，通過FTIR的檢測，證實在合成的步驟中並沒有產生多餘的化學反應來影響熱能的相關檢測。

關鍵字

熱儲能系統；儲能相變材料；微膠囊；複合凝聚法

並列摘要

The increasing of greenhouse gas emissions and the increasing of the fuel prices are the main driving forces to more effectively utilize various sources of renewable energy. Around the world, direct solar radiation is considered to be one of the most prospective sources of energy. Scientists all over the world are searching for new and renewable energy sources, but they are intermittent and unstable . To overcome these difficulties, phase change material for thermal energy storage has caught more and more attention at present. However, most of the research was relate to paraffin, fatty acid and salt hydrates and so on as energy storage materials. Fewer people discuss with mixed fatty acids as a phase change material. Therefore, this experiment using mixed fatty acids as a raw material. Palm oil is composed of lauric acid, myristic acid, palmitic acid and others. These main fatty acids contain high latent heat, which is suit to be a phase change material. Phase change materials combined with microcapsule technology has been used for a long time. Microencapsulated phase change material (MPCM), which refers to the phase change material coating with a layer of film.In this research, we found the best parameter of manufacturing the microencapsulated phase change material. We regulate the pH value to 4.8, regulate the ratio of the gum to 7%, lower the temperature to 5℃, use 12ml Formaldehyde as the crosslinker, keep the rotation at 5000rpm.

並列關鍵字

Thermal energy storage ； Phase change material ； Microencapsulation ； Coacervation

參考文獻

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利用複合凝聚法製備棕櫚油微膠囊相變化儲能材料

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