中文摘要：

采用RT31石蜡为芯材、脲醛树脂为壁材,利用原位聚合法制备相变材料微胶囊,采用扫描电子显微镜、差示扫描量热仪和光学显微镜考察了乳化剂种类对微胶囊微观形貌和热性能的影响,同时考察了不同乳化剂用量和乳化转速下制备的微胶囊的平均粒径及其分布和热性能,最后讨论了制备过程中不同酸化时间对微胶囊微观形貌的影响.实验结果表明：由52%的吐温60和48%的司盘60组成的复合乳化剂,其用量为芯材质量的5%、乳化转速为3000r/min时,制备的微胶囊呈现呈粒径均一、表面光滑、密封良好的球状,相变温度为303.10K,潜热最高达63.85J/g,平均粒径为9.32μm;在微胶囊的制备过程中,适宜的酸化时间为90min.

英文摘要：

In this paper,first,microencapsulated phase change materials were synthesized by the in-situ polymerization,with urea-formaldehyde resin as the shell and with RT31 paraffin as the core.Next,the effects of different emulsifiers on the morphology and thermal properties of the microcapsules were analyzed by means of SEM,DSC and optical microscopy.Then,the average particle size and its distribution as well as the thermal properties of the microcapsules at different emulsifier dosages and rotation speeds were analyzed. Finally, the morphology of the microcapsules varying with the acidification time was observed. Experimental results show that, when the complex emulsifier is composed of 52% （mass fraction, the same below） Tween 60 and 48% Span 60, the microcapsules made from 5% complex emulsifier at the rotation speed of 3000r/min are of uniform particle size, smooth and well- sealed surface, a phase-change temperature of 303.10K, a latent heat-storage capability of 63.85 J/g and an average particle size of 9.32 μm, and that the optimal acidification time for microcapsule synthesis is 90 min.