甜橙香精微胶囊的制备及缓释性能研究

为了改善香精微胶囊的缓释性能、提高香精利用率，以甜橙香精为芯材、六亚甲基二异氰酸酯(HDI)三聚体为合成壁材的单体、聚乙二醇（PEG）和石墨烯（GR）作为温控材料，利用界面聚合法制备温控香精微胶囊（egHDI-O），考察芯壁比、剪切乳化机的转速、温控组分对甜橙香精微胶囊形貌、组成、芯材含量和缓释性能的影响。结果表明：在甜橙香精微胶囊芯壁比为1∶2，转速为8 000 r/min，乳化剂为吐温80，PEG和GR用量分别为200 g/L和5 g/L工艺条件下制备的egHDI-O具有良好的形貌和均匀的粒径，其芯材含量(质量分数)可达74%；相比于未添加PEG和GR的微胶囊，egHDI-O具有优良的温控性能。研究为开发新型温控缓释赋香材料提供了新思路。

Preparation and sustained-release performance of sweet orange flavor microcapsules

In order to improve the sustained-release performance of essence microcapsules and utilization rate of essence, the thermal control essence microcapsules (egHDI-O) were prepared by interfacial polymerization using sweet orange essence as the core material, hexamethylene diisocyanate (HDI) trimer as the monomer of synthetic wall material, and polyethylene glycol (PEG) and graphene (GR) as the thermal control materials. The effects of core wall ratio, speed of the shearing emulgifier and thermal control components on the morphology, composition, core material content and sustained-release performance of sweet orange essence microcapsules were investigated. The results show that the egHDI-O prepared with the sweet orange essence microcapsule core wall ratio of 1∶2, the rotate speed of 8 000 r/min, the emulsifier of Tween 80, the dosage of PEG and GR of 200 g/L and 5 g/L, respectively, has good morphology and uniform particle size, and its core material content reaches 74%; Compared to microcapsules without PEG and GR, egHDI-O has excellent thermal control performance. This study provides a new idea for the development of new thermal control sustained-release fragrance materials.