具有薄荷香味的相变微胶囊的制备与表征

Preparation and Characterization of Microcapsulated Phase Change Materials with Peppermint Fragrance

利用界面聚合法,以异佛尔酮二异氰酸酯与己二胺为单体聚合形成的聚脲为外壳,以正十八烷、薄荷素油的混合物为芯材,制备了具有薄荷香味的相变微胶囊。利用光学显微镜、扫描电镜、红外光谱仪、差示扫描量热仪、热重分析仪等对微胶囊的形貌、化学结构和热性能进行了表征。结果表明:制备的微胶囊为球形,平均粒径约7.0μm,有较高的储热能力和较好的热稳定性;芯材中添加8.3%的正十四醇或高熔点石蜡,可很好地抑制相变微胶囊的过冷现象。

The core material of n-octadecane and dementholized peppermint oil was encapsulated by polyurea as shell material made through the interfacial polymerization of isophorone diisocyanate and hexamethylenediamine to prepare the microcapsulated phase change materials（MicroPCMs）with peppermit fragrance scent.Morphology,chemical structure and thermal properties of the microcapsules were characterized by optical microscope,scanning electron microscope,fourier transform infrared,differential scanning calorimetry and thermal gravity analysis.Results show that MicroPCMs are spherical.The average size of the microcapsules is about 7.0μm.MicroPCMs have a high heat storage capacity and good thermal stability.The addition of approximately 8.3% nucleating agents 1-tetradecanol or paraffin in core materials can suppress supercooling of MicroPCMs.