教師資料查詢 | 類別: 會議論文 | 教師: 董崇民DON, TRONG-MING (瀏覽個人網頁)

標題:以過硫酸鉀降解幾丁聚醣之研究
學年93
學期2
發表日期2005/05/28
作品名稱以過硫酸鉀降解幾丁聚醣之研究
作品名稱(其他語言)
著者賴亭吟; 董崇民; Don, Trong-ming
作品所屬單位淡江大學化學工程與材料工程學系
出版者
會議名稱2005年台灣幾丁質幾丁聚醣研討會
會議地點臺南, 臺灣
摘要幾丁聚醣因為無法溶於純水及中性水溶液而限制了它們的應用;幾丁寡醣或低聚合度幾丁聚醣則由於可溶於水,具有更好之生理活性,因而可廣泛應用於生醫、食品及農業方面。本實驗研究過硫酸鉀(KPS)降解幾丁聚醣之反應機構及反應動力,結果發現在酸性環境下,添加少量的過硫酸鉀即可迅速降解幾丁聚醣分子鏈,同時降解速率隨著過硫酸鉀添加量的增加或溫度的提昇而增加。我們假設了一個以自由基降解幾丁聚醣的反應機構,從此機構中導出一個簡單的反應動力式,進而計算出幾丁聚醣降解速率和KPS濃度的0.40次方成正比。;Applications of chitosan are limited by their insolubility in neutral water and organic solvents. However, chitosan oligomers or low-molecular-weight chitosan can be dissolved in neutral solution and offer better biological activities, such that they are widely used in biomedical applications, food industry and agriculture, etc. In this study, potassium persulfate (KPS) was used to degrade chitosan, further facilitated by an acid environment. Molecular chain of chitosan was found to be degraded rapidly by an addition of a small amount of KPS. The degradation rate was increased with increasing the KPS amount or temperature. A reaction mechanism was proposed based on free radical degradation. According to this mechanism, a simple kinetic model was derived, where the degradation rate was found to be proportional to 0.40 power of KPS concentration.
關鍵字幾丁聚醣;過硫酸鉀;降解反應;Chitosan;Potassium persulfate;Degradation
語言中文
收錄於
會議性質國內
校內研討會地點
研討會時間20050528~20050528
通訊作者
國別中華民國
公開徵稿Y
出版型式紙本
出處2005年台灣幾丁質幾丁聚醣研討會論文集,4頁
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