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摘要: 本课题分别以β-环糊精及羟丙基-β-环糊精为壁材，对百里香精油进行包覆，制备百里香精油胶囊。分别采用生物显微镜、热重分析仪、旋转流变仪对微胶囊的微观形貌、精油包覆率及流变特性进行测试，结果表明百里香精油胶囊形态较好，且当取稳定剂：壁材为1:10；精油含量20%，固含量为16.7%时，所得的百里香精油胶囊稳定性最佳，包埋率为6.87%。流变测试结果表明，随着剪切速率增加，该微胶囊体系均表现出剪切变稀的特性，为假塑性流体；动态测试结果表明，随着扫描频率增加，该微胶囊体系的储能模量（G’）及损耗模量（G’’）均随之增加，表明该微胶囊体系为粘弹性性流体。将该微胶囊用于皮革抗菌，对黄绿青霉和黑曲霉均能有效抑制，最长抑菌时间的达7天。22753
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毕业论文关键词: 百里香精油；β-环糊精；微胶囊；流变性；抗菌性
The study of Thyme essential oil capsule performance
Abstract: This paper respectively with β - cyclodextrin and hydroxypropyl - β - cyclodextrin as wall material, the coating of thyme oil, thyme oil capsule preparation. Respectively by means of biological microscope, thermogravimetric analyzer, rotational rheometer, the morphology of microcapsules oil coating rate and rheological properties were tested, results show that better thyme oil capsule form, and when the stabilizer: wall material is 1:10; essential oil content of 20%, the solid content is 16.7%, the best stability of thyme essential oil capsules, package buried rate is 6.87%. The rheological test results show that, with the increase of shear rate, the microcapsule system showed shear thinning characteristics, pseudoplastic fluid; dynamic test results show that, with the increase of scanning frequency, the microcapsule system storage modulus (G ') and loss modulus (G' ') were all increased, show the microcapsule system for viscoelastic fluid. The micro capsule for leather antibacterial, green Penicillium and Aspergillus niger to suppress all can, the longest inhibitory time for up to 7 day
Key words：Thyme oil；β- cyclodextrin；Antibacterial；microcapsules；Rheology
目录
1．文献综述 1
1.1 引言 1
1.2 百里香精油及其抑菌性 1
1.3常见的包覆技术 2
1.4.微胶囊的流变性 3
1.5 流变学研究对缓释香精的作用 4
1.6 本课题的研究目的和意义 5
2. 实验部分 5
2.1实验材料 5
2.2 实验仪器 5
2.3百里香精油胶囊的制备 6
2.3.1黄原胶用量 6
2.3.2 精油用量 6
2.3.3固含量用量 6
2.4 皮革抗菌 6
2.4.1培养基的制备 6
2.4.2菌悬液的制备 6
2.4.3芳香抗菌皮革制备 6
2.4.4抑菌性能的测定 7
2.5 百里香精油胶囊的性能测定与表征 7
2.5.1缓释香精胶囊显微镜观察 7
2.5.2 缓释香精胶囊流变特性的测定 7
2.5.3热重分析 7
2.5.4芳香皮革的抑菌测试 7
3. 结果与讨论 8
3.1 百里香精油胶囊的制备 8
3.1.1 β-环糊精的微观形貌 8
3.1.2 羟丙基β-环糊精的微观形貌 8
3.2 百里香精油的流变性研究 9
3.2.1 β-环糊精为壁材的百里香精油胶囊的流变性 9
3.2.2 羟丙基- β-环糊精为壁材的百里香精油胶囊的流变性 15