海藻酸钠-壳聚糖相变储热微胶囊的制备

海藻酸钠和壳聚糖都是价廉环保的天然高分子材料，具有广阔的应用开发前景。以海藻酸钠-壳聚糖为壁材，复合醇为芯材，通过乳化固化法制备出相变储热微胶囊，解决了脂肪醇在相变过程中的泄露问题。探讨了芯材用量、碳酸钙用量、乳化体系和壳聚糖浓度等对微胶囊储热性能的影响，利用扫描电镜、激光粒径分析仪、DSC和测试步冷曲线等手段对微胶囊进行表征。结果表明，制得微胶囊的相变温度为37.9℃，调温区间为37.9~40.8℃，相变潜热为52.8J/g，芯材包封率为44.7%。

Preparation of alginate-chitosan phase change heat storage microcapsules

Both alginate and chitosan are cheap and environmental friendly as the natural polymers, which have the considerable prospects. In order to solve fatty alcohol Leakage problem during the phase change process, microencapsulated binary fatty alcohol with alginate-chitosan shells as phase change material for thermal energy storage were prepared by emulsification-gelation. The dosages of core materials, CaCO3, emulsifier and the concentration of chitosan have been investigated. Microcapsules were characterized by DSC, SEM, laser particle sizer and temperature-time cures. The results show that the phase transition temperature is 37.9℃, the temperature adjustment range is 37.9~40.8℃, the latent heat is 52.8J/g, and binary fatty alcohol encapsulation efficiency is 44.7%.