采用一种新方法制备了以聚四氢呋喃醚(PYMG)为芯材的聚氨酯纳/微胶囊相变材料(PU-N/MEPCM),通过红外(IR),动态光散射(DLS),透射电镜(TEM),差示扫描量热法(DSC)和热重分析(TGA)等测试手段对PU-N/MEPCM的化学结构,粒径,形态,热性能,稳定性和外壳强度进行研究.结果表明,两亲性嵌段聚氨酯可以包裹在芯材外层形成纳/微胶囊,其粒子具有核壳型,复合型和聚氨酯粒子型三种结构;改变PU的羧基含量可以使芯材含量达到65%;粒径可以从198nm变化到420 nm;相变焓可以达到纯芯材的65%;PU-N/MEPCM的热稳定性随着羧基含量的增加而变好.
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