通过原位聚合法合成了Na2HPO4·12H2O@尿醛树脂微胶囊相变储能材料.考察了尿素和甲醛的物质的量比对所得微胶囊结构和形貌特征的影响.采用扫描电镜(SEM)观察微胶囊的表观形态,透射电镜(TEM)观察微胶囊的微观结构,傅里叶红外光谱(FT-IR)表征了微胶囊复合材料的成分,激光导热仪测量了微胶囊的导热系数,差示扫描量热仪(DSC)表征了微胶囊的相变特性,热重分析仪(TGA)测定了微胶囊质量与温度间的关系.结果表明,所制备出的微胶囊为球状壳/核结构,包封良好,球体粒径约为500nm,相变潜热约为121.2J/g,在30～84℃的温度范围内失重量＜10％.该微胶囊相变储能材料具有一定的应用前景.
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