| 研究生: |
游帝凱 Yu, Ti-kai |
|---|---|
| 論文名稱: |
三聚磷酸鹽交聯chitosan顆粒之製備與改質及其在蛋白質藥物釋放之測定 Preparation and modification of chitosan beads crosslinked by tripolyphosphate for controlled release of protein drugs. |
| 指導教授: |
林睿哲
Lin, Jui-Che |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 化學工程學系 Department of Chemical Engineering |
| 論文出版年: | 2006 |
| 畢業學年度: | 94 |
| 語文別: | 中文 |
| 論文頁數: | 93 |
| 中文關鍵詞: | 幾丁聚醣 、褐藻酸 、藥物控制釋放 |
| 外文關鍵詞: | alginate, chitosan, drug controlled release |
| 相關次數: | 點閱:193 下載:1 |
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當幾丁聚醣水溶液以液滴的形式,滴入三聚磷酸鹽水溶液中後,會由於物理性的離子交聯作用,而形成型態圓潤的顆粒。在實驗中亦可將褐藻酸加入三聚磷酸鹽水溶液,透過聚電解質複合層的形式,達到顆粒表面改質之目的。
本實驗將以牛體血清白蛋白作為標準藥物,結合上述之造粒系統,進行蛋白質藥物控制釋放實驗之探討。
實驗結果發現,當幾丁聚醣、三聚磷酸鹽、與褐藻酸之濃度組成不同時,會因造粒時的擴散差異,使顆粒的結構各有不同。顆粒結構主要由密實的外殼層與多孔的核心所組成,不同的顆粒結構將影響到該顆粒之膨潤性質、藥物包埋率、以及釋放曲線之表現。
在添加褐藻酸之顆粒表面改質中,會發現藥物包埋率有相當顯著的提升,在藥物釋放時則會有較強烈的釋放傾向。但未改質的顆粒卻僅有約50%的包埋率,與較弱的釋放趨勢。
As chitosan solution was dropped into tripolyphosphate solution, round beads were formed immediately with the formation of ionic-crosslink between these two components. Alginate may also be added into tripolyphophate solution in order to form polyelectrolyte layer for bead surface modification. In this study, a protein drug controlled release system was investigated by using bovine serum albumin as a model drug and beads aforementioned as the carrier matrix.
After a series of experiments, it was noticed that using different concentration ratios of chtosan, tripolyphosphate, and alginate solution would lead to the diffusion differences during the bead formation, and, henceforth, make the bead structures very different from each other. The bead structure is generally consisted of a dense cortex and a porous core. The variation of the bead structure would affect the swelling properties, drug loading efficiencies, and release profiles of these beads.
In the alginate-modified beads, the drug loading efficiency was dramatically increased, and the drug release tendency was also amplified. In contrast, the unmodified beads had only about 50% loading efficiency and a very limited release tendency instead.
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