全封闭型茉莉香精微胶囊的制备和表征

Preparation and Characterization of Totally Encapsulated Microcapsules of Jasmine Fragrance

采用原位聚合法以有机合成密胺树脂为壁材对茉莉香精进行包覆制备香精微胶囊,并用无机纳米二氧化硅对微胶囊进行表面改性,制备出全封闭型茉莉香精微胶囊。用扫描电镜(SEM)、红外光谱仪、热重分析仪、紫外分光光度计等手段对微胶囊样品的形貌、化学组分、结构、包埋率以及封闭性进行了表征。结果表明,本文制备的全封闭型茉莉香精微胶囊具有单核壳核结构,微胶囊的囊壁具有密闭特性,香精包埋率达到18%。

Totally encapsulated microcapsules of jasmine fragrance were prepared by in situ polymerization with melamine resin as wall material and inorganic nanometer silicon dioxide as surface modifier. The morphology, chemical composition, structure and embedding rate of the prepared microcapsules were characterized by scanning electron microscopy （SEM）, Fourier transform infrared （FT-IR） spectrometric test, thermo gravimetric analysis （TG-DTG）. Results show that the totally encapsulated microcapsules of jasmine fragrance present a core-shell structure with the capsule shell of good tightness and an embeddina rate of 18%.