缓释芳香纳米微胶囊的制备及其应用研究

发布时间：2018-06-18 00:43

  本文选题：缓释 + 芳香　； 参考：《陕西科技大学》2017年硕士论文

【摘要】：香味对人体有美容,舒缓压力,放松肌肉等益处,然而具有香味的物质沸点低,易挥发,在应用中留香时间短。因此,对香味物质进行适当保护以控制其释放速率具有重要的意义。本研究以Si O2为壁材制备芳香精油纳胶囊,以期利用壁材的包裹作用保护香味物质达到缓释长效作用,研究其在棉织物上的应用性能,并探索疏水化处理对织物的芳香缓释性能的影响。(1)采用硬模板法制备中空介孔二氧化硅(HMSN),并将柠檬精油载入HMSN中,获得柠檬精油纳胶囊。考察装载温度、装载时间和精油的体积分数对装载量的影响,通过正交试验优化HMSN装载柠檬精油的条件。通过SEM和TEM观察纳米颗粒的形貌;采用紫外-可见-近红外分光光度计测定纳胶囊的装载量和缓释率;利用热重分析仪测定精油纳胶囊的稳定性。研究结果表明,在优化条件下制备的柠檬精油纳胶囊的装载量高达85.8%,其在20℃的室温条件下放置6天,柠檬精油的释放率仅为7.9%,达到缓释效果。将制备的柠檬精油纳胶囊应用于棉织物,并利用纳胶囊对纤维的粗糙化作用,通过对棉织物进行疏水化处理即可获得超疏水芳香棉织物。研究发现,超疏水性能还改善了织物上纳胶囊的缓香效果。(2)采用溶胶-凝胶法制备薰衣草精油纳胶囊并研究其应用性能。将薰衣草精油、正硅酸乙酯(TEOS)、十六烷基三甲基溴化铵(CTAB)和正十六烷混合,然后经预乳化和高速乳化剪切得纳米粒径的乳液滴,转移至烧瓶中并在40℃下进行机械搅拌反应24 h。考察乳化时间、乳化速度、CTAB用量以及壁芯质量比对薰衣草精油纳胶囊形貌、装载量和粒径的影响。采用TEM观察薰衣草精油纳胶囊的形貌和粒径;利用紫外-可见-近红外测定纳胶囊的装载量,结合重量法计算缓释率。研究结果表明,制备的薰衣草精油纳胶囊装载量可达58.7%,在20℃环境下放置15天,释放率仅为19.6%。采用疏水剂AG-950作为粘合剂,将薰衣草精油纳胶囊处理在棉织物上,获得了薰衣草芳香超疏水棉织物,该织物具有良好的自清洁性和防污性,提高了织物的长效留香作用。
[Abstract]:Fragrance has many advantages such as beauty relief pressure relaxation and muscle relaxation. However the aromatic substances have low boiling point volatile and short time to stay in application. Therefore, it is of great significance to protect the aroma substances properly to control their release rate. In this study, the aromatic essential oil and sodium capsules were prepared with Sio _ 2 as wall material, in order to protect the aroma substances from the wall material to achieve the long-lasting effect of sustained release, and to study the application properties of the capsules on cotton fabrics. The effects of hydrophobic treatment on the slow release properties of fabrics were investigated. (1) the hollow mesoporous silica (HMSN) was prepared by hard template method, and the lemon essential oil was loaded into HMSN to obtain lemon essential oil capsules. The effects of loading temperature, loading time and volume fraction of essential oil on the loading quantity were investigated. The conditions of HMSN loading lemon essential oil were optimized by orthogonal test. The morphology of nano-particles was observed by SEM and TEM. The loading quantity and sustained release rate of the capsule were determined by UV-Vis near infrared spectrophotometer and the stability of the capsule was determined by thermogravimetric analysis. The results showed that the loading capacity of Lemon essential Oil capsule was as high as 85.8, and the release rate of Lemon essential Oil was only 7.9% when it was stored at 20 鈩，

本文编号：2033203