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資料載入中.....
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請使用永久網址來引用或連結此文件:
https://irlib.pccu.edu.tw/handle/987654321/16499
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| 題名: | 不同緩釋劑對幾丁聚醣微膠囊包覆檸檬精油之界面性質及其緩釋性探討 |
| 作者: | 高韻棽 |
| 貢獻者: | 材料科學與奈米科技研究所 |
| 日期: | 2009 |
| 上傳時間: | 2010-09-07 15:39:23 (UTC+8) |
| 摘要: | 本實驗以幾丁聚醣為殼材，檸檬精油為芯材。利用簡單凝膠法製備幾丁聚醣微膠囊，藉由測量液體黏度、極性、表面張力、接觸角等界面性質，探討微膠囊殼材與芯材之間的界面性質等物理和化學性質與成型性的關係。並藉由添加緩釋劑增加其時效性。將精油微膠囊化可避免因光熱、濕氣、化學藥品或其他因素而使之產生變質，並探討其可行性，以期達到長效性之使用效果。最終期望能達到穩定釋放。更可符合精油揮發之理想性曲線。
經由實驗中發現，利用利用簡單凝膠法所製備之成型條件，微膠囊技術包覆的精油微膠囊比未經包覆的精油具有較長的釋放時間。且在幾丁聚醣2%條件下，製備而的之檸檬精油微膠囊具有良好之成型性。由於分子間之作用力，使的添加麝香香精之檸檬精油之制放性質較添加苯甲酸苯甲酯和廣藿香精油之檸檬精油較佳緩釋效果。當檸檬精油添加麝香香精10%時，其表面張力為56.12(mN/m) 、黏度1.64cP、接觸角22.26°，在幾丁聚醣2%條件下具有明顯的緩釋效果。
The chitosan microcapsules were prepared by simple coacervation method. Wall and core were made of chitosan and lemon essential oil each, which was changed by adding different control-released agents. Therefore the using timeliness of microcapsules was enhanced.
The microcapsules can protect core material from some serious condition such as thermal, sunlight, humility, or chemical solvent…etc. Plus, in this study, stable releasing and longer using timeliness were expected.
It was discovered that microcapsules can enhance the using timeliness to 3hr by comparing with lemon essential oil. On the other side, the regular condition was concentration of wall material is 2%. The core material, lemon essential oil, was add each three different control-released agent, which is benzyl benzoate, musk essential oil, or patchouli oil for each preparation. Rely on the results, the shape of microcapsules would be good and stable by these three control-released agent. Because molecular force between lemon essential oil and each three control-released agent. Adding musk essential oil in lemon essential oil microcapsules was better than the others on efficiency of control-released and using timeliness, which was extended to 3.14 times as surface tension was 56.12mN/m, viscosity was 1.64cP, contact angle was 22.26°, and the concentration of wall material was 2%. |
| 顯示於類別: | [化學工程與材料工程學系暨碩士班] 博碩士論文
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