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奈米銀/幾丁聚醣複合薄膜之製備及特性研究 林科町、

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奈米銀/幾丁聚醣複合薄膜之製備及特性研究 林科町、

E-mail: [email protected]

摘 要

本研究利用鹽酸、硝酸及醋酸與幾丁聚醣反應製成幾丁聚醣鹽,再分別配成濃度為0.5 %、0.75 %及1.0 % (w /v)幾丁聚醣鹽 類水溶液,經添加不同濃度硝酸銀與戊二醛反應,利用澆鑄成膜方式來製備薄膜。薄膜經分析其吸濕率為16 ~ 29 %。

用FESEM觀察銀化合物分佈在薄膜中粒徑約為6 ~ 74 nm,且分散於幾丁聚醣硝酸鹽薄膜粒子平均粒徑比分散於幾丁聚醣 鹽酸鹽薄膜平均粒徑小。經由FTIR圖譜可以證實戊二醛與幾丁聚醣確實有進行架橋反應。由接觸角測試得知,經過架橋 反應後的薄膜接觸角比沒有經過架橋反應薄膜角度大。以物性測定儀來探討薄膜抗拉強度大小,有添加戊二醛薄膜其拉力 會比沒有添加戊二醛薄膜拉力大,斷裂伸長率隨鹽類濃度增加而增加,但是隨著戊二醛濃度增加而降低。由阻抗分析實驗 中得知,製備出薄膜最佳導電度可以達到1.2×10-3 S/cm。

關鍵詞 : 幾丁聚醣 ; 薄膜 ; 導電度 ; 抗拉強度

目錄

封面內頁 簽名頁 授權書... iii 中文摘要... iv 英文摘要... v 誌 謝... vi 目錄... vii 圖目錄... x 表目

錄... xiv 1.研究目的... 1 2.文獻回顧... 2 2.1奈米科 技... 2 2.1.1奈米材料與奈米技術... 2 2.1.2奈米粒子的性質... 3 2.1.3奈米 銀... 4 2.1.4奈米材料之應用... 5 2.2幾丁質與幾丁聚醣簡介... 8 2.2.1幾丁質與 幾丁聚醣來源... 8 2.2.2幾丁質與幾丁聚醣及其衍生物之結構... 8 2.2.3幾丁質之製備... 9 2.2.4 幾丁聚醣之製備... 10 2.2.5幾丁聚醣化學性質... 11 2.2.6以澆鑄成膜之相關研究... 13 2.3薄膜簡介... 14 2.3.1薄膜的分類... 14 2.3.2薄膜製備方法... 15 2.4聚電 解質(polyelectrolyte)... 17 2.4.1聚電解質之應用... 18 3.材料與方法... 19 3.1實驗材 料... 19 3.2儀器設備... 20 3.3實驗設計... 21 3.4實驗流

程... 23 3.5幾丁聚醣鹽類之製備... 24 3.6薄膜的製作... 24 3.7分析方 法... 25 3.7.1吸濕率測試... 25 3.7.2場發射掃描式電子顯微鏡... 25 3.7.3傅立葉 紅外線吸收光譜儀... 26 3.7.4接觸角分析... 27 3.7.5抗拉強度測試... 28 3.7.6電阻抗 分析... 28 4.結果與討論... 30 4.1薄膜樣品製備... 30 4.2場發射電子顯微 鏡觀察(FESEM... 34 4.3傅立葉紅外線吸收光譜分析... 49 4.4接觸角分析(contact angle)... 53 4.5抗 拉強度測試分析(tensile strength measurement)67 4.5.1拉力部份... 67 4.5.2斷裂伸長率部份...

81 4.6導電度測試分析... 93 5.結論... 107 參考文獻... 108 參考文獻

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參考文獻

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