摘要：本课题对不同干燥方式处理后的两种不同壁材包覆的桂花香精微胶囊进行热重分析，以微胶囊中香精的装载率和热分解过程中所需的活化能评定保存香精微胶囊最佳方法。结果表明，β-环糊精作为壁材对桂花香精的保护作用比聚丙烯酸酯更好，而且耐热性能也更好。对于β-环糊精香精微胶囊，两种干燥方式处理的香精微胶囊包覆率所差不大，经三种方程计算的桂花香精热分解的平均活化均高于冷冻干燥，得知鼓风干燥后的微胶囊中桂花香精更稳定，耐热性能也更好。对于聚丙烯酸酯微胶囊，计算得到自然干燥后的桂花香精热分解所需的活化能更高，香精的稳定性更好，但是耐热性不如鼓风干燥，而且在干燥过程中由于周期较长，桂花香精损失较多，造成自然干燥的聚丙烯酸酯微胶囊的装载率低于鼓风干燥的微胶囊。52403

毕业论文关键词：香精胶囊；热分解；活化能；分析

Study on thermal performance of flavor microcapsule

Abstract: The subject of different drying methods were two different wall materials coated with sweet scented osmanthus fragrance microcapsules were thermogravimetric analysis to microcapsule essence of loading rate and thermal decomposition required in the process of activation energy save evaluation essence microcapsule best method. The results show that the hydroxypropyl beta cyclic dextrin as the wall material of osmanthus fragrance protective effect of polyacrylate better, and heat resistance is better than. For hydroxypropyl beta cyclodextrin fragrant microcapsule, two drying methods of flavor microencapsulation rate difference, calculated by the three kinds of equations of osmanthus fragrance thermal decomposition of the average activation were higher than that of freeze drying, that blast drying after the micro capsule osmanthus fragrance is more stable, heat-resistant performance is better. For polyacrylate micro capsule to calculate natural drying of osmanthus fragrance thermal decomposition of the activation energy of more high, flavor stability is better, but heat resistant than blast drying and in the drying process due to the longer cycle, osmanthus fragrance loss more, resulting in natural drying of polyacrylate micro capsule loading rate is lower than the blast drying micro capsule.  

Key Words: fragrance nanocapsule；thermal decomposition；activation energy；application

目录

1 文献综述 1

1.1 香料香精行业简况 1

1.2 香精微胶囊的研究 2

1.3 热分析的研究 3

1.4 热分解动力学方程 4

1.5 本课题的研究目的和意义 6

2 实验部分 7

2.1 实验材料 7

2.1.1 实验材料和试剂 7

2.1.2 主要仪器和设备 7

2.2 β-环糊精包覆桂花香精微胶囊的制备 7

2.3 香精微胶囊的干燥处理 8

2.3.1 香精微胶囊干燥处理前的准备 8

2.3.2 两种香精微胶囊干燥方式的选择 8

2.3.3 干燥处理后的样品现象 8

2.4 香精微胶囊的热性能测定 8

2.4.1 香精微胶囊装载率的测定 8

2.4.2 香精热分解所需活化能的计算 8