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研究生： 張志仲
Chang, Chih-Chung
論文名稱： 可降解及多孔性之適強度幾丁聚醣薄膜膠體對銅離子吸附的研究
Study of copper ions adsorption upon the biodegradable and porous chitosan film with a proper strength
指導教授： 廖峻德
Liao, Jiunn-Der
學位類別： 碩士
Master
系所名稱： 工學院 - 材料科學及工程學系
Department of Materials Science and Engineering
論文出版年： 2007
畢業學年度： 95
語文別： 中文
論文頁數： 60
中文關鍵詞： 幾丁聚醣 、電漿改質 、原子吸收光譜儀 、傅立葉轉換紅外線光譜儀 、X光光電子能譜儀
外文關鍵詞： plasma modification, Fourier Transform Infrared Spectrometer, Atomic Absorption Spectrometry, chitosan, X-ray Photoelectron Spectroscopy
相關次數： 點閱：126  下載：1 
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    • 幾丁聚醣是天然的高分子聚合物，其分子結構具有胺基官能基，能與金屬離子產生鍵結而形成穩定的錯合物，適合用來去除重金屬廢液。本研究以未交聯與經0.25 wt%三聚磷酸鹽溶液交聯後的幾丁聚醣薄膜膠體做為研究的材料。首先，探討未交聯與交聯的幾丁聚醣薄膜膠體在機械、含水、溶解性質上的差異，接著，分析未交聯與交聯幾丁聚醣薄膜膠體在吸附銅離子前後變化的情形，最後，利用NH3和NH3/N2電漿改質未交聯與交聯幾丁聚醣薄膜膠體，並觀察對銅離子吸附量及表面成份元素變化的情形。實驗結果顯示：幾丁聚醣薄膜膠體交聯後，其機械性質會有所提升且在酸性溶液中的溶解率會降低。利用掃描式電子顯微鏡觀察出未交聯與交聯的薄膜膠體表面皆有孔洞的分佈，水分子會藉由孔洞擴散進入薄膜膠體內部，所以含水率高。使用能量散佈X光譜儀可以測得兩組薄膜膠體吸附銅離子後，有銅元素訊號產生。以原子吸收光譜儀可以得知交聯後的薄膜膠體對銅離子的吸附量並未因交聯而減少，對照溶解測試結果推測，在酸性溶液中，交聯的幾丁聚醣薄膜膠體比未交聯的溶解率低，所以對銅離子吸附量並沒有明顯地減少。以傅立葉轉換紅外線光譜儀和X光光電子能譜儀分析結果得知，銅離子會與幾丁聚醣分子上的胺基產生了鍵結而吸附，所以屬於化學性吸附。從原子吸收光譜儀和X光光電子能譜儀得知，NH3電漿改質未交聯薄膜膠體，其N/C比減少6.5 %，故對銅離子吸附量減少，而NH3/N2電漿改質未交聯薄膜膠體，其N/C比增加12 %，故對銅離子吸附量增加；若分別以NH3和NH3/N2電漿改質交聯薄膜膠體，其N/C比分別增加4.5 %和16.2 %，故對銅離子吸附量分別增加，因此推論藉由電漿改質所增加氮的含量為促進幾丁聚醣薄膜膠體銅離子吸附量的原因。

    Chitosan is a nature polymer which can form stable complexes with metal ions by using the amine group of its molecular structure. Therefore, it is suitable to remove heavy metal-containing wastewater. In this study, two methods were employed to prepare two kinds of films which were non-cross-linked and cross-linked chitosan films by using 0.25 wt% tripolyphosphate solution. At first, the mechanical property, water absorption and solubility of non-cross-linked and cross-linked chitosan films were discussed. Then copper ion adsorption test were analyzed. At last, two kinds of films were modified by using ammonia and ammonia/nitrogen plasma. After that, the capability of copper ions adsorption and chemical bonding species on plasma-modified films were investigated. Experimental results demonstrated that the mechanical property of cross-linked chitosan film was improved and its solubility ratio in acid solution was decreased. Porous structure was uniform spread on the chitosan films detected by Scanning Electron Microscope (SEM), which resulted in high water absorption. The signal of copper was detected on copper ions adsorption of films by Energy Dispersive X-ray Spectrometer (EDS). From Atomic Absorption Spectrometry (AAS), the copper ions adsorption capacity of cross-linked chtiosan film was comparable to that of non-cross-linked chitosan film because cross-linked chitosan had low solubility ratio in acid solution. From Fourier Transform Infrared Spectrometer (FTIR) and X-ray Photoelectron Spectroscopy (XPS), copper ions formed chemical adsorption with amine group on chitosan films. From AAS and XPS, for non-cross-linked chitosan film, the N/C ratio decreased 6.5 % after ammonia plasma treatment, so the capability of copper ions adsorption was decreased. On the other hand, the N/C ratio increased 12 % after ammonia/nitrogen plasma treatment, so the capability of copper ions adsorption was increased. In respect of cross-linked chitosan film, the N/C ratio increased 4.5 % and 16.2 % respectively after ammonia and ammonia/nitrogen plasma treatment, so the capabilities of copper ions adsorption were increased. Therefore, the increase of nitrogen content on the plasma treated chitosan films resulted in the increased capabilities of copper ions adsorption.

    第一章　序論.............................................01 1-1　前言................................................01 1-2　文獻回顧............................................02 1-3　研究動機與目的......................................06 第二章　理論基礎.........................................08 2-1　重金屬..............................................08 2-1.1　重金屬的定義......................................08 2-1.2　重金屬的污染源及危害..............................08 2-1.3　去除重金屬的方法..................................08 2-2　幾丁聚醣............................................09 2-2.1　幾丁類物質的由來..................................09 2-2.2　幾丁質/幾丁聚醣的簡介.............................09 2-2.3　幾丁聚醣的製備....................................11 2-2.4 幾丁聚醣的物理改質................................12 2-2.5 幾丁聚醣的化學改質................................14 2-2.6 幾丁聚醣的應用....................................15 2-3　膠體的簡介..........................................16 2-4　幾丁聚醣對重金屬離子的吸附..........................18 2-4.1 幾丁聚醣的吸附原理................................18 2-4.2 吸附過程..........................................18 2-4.3 吸附方程式........................................19 2-5　電漿化學............................................20 2-5.1　電漿簡介..........................................20 2-5.2　電漿狀態..........................................21 2-5.3 低溫電漿表面改質技術..............................22 第三章　材料與方法.......................................23 3-1　實驗藥品............................................23 3-2　實驗儀器............................................23 3-2.1 拉伸試驗機.......................................23 3-2.2 掃描式電子顯微鏡.................................23 3-2.3 減弱式全反射-傅立葉轉換紅外光譜儀................24 3-2.4 原子吸收光譜儀...................................25 3-2.5 X光光電子能譜儀..................................26 3-2.6 可調整陣列式微波電漿改質機台.....................28 3-3 實驗方法............................................29 3-3.1 多孔性幾丁聚醣薄膠體的製備.......................29 3-3.2 電漿改質幾丁聚醣薄膜膠體.........................30 3-3.3 幾丁聚醣薄膜膠體對銅離子吸附的行為...............30 3-3.4 電漿改質幾丁聚醣薄膜膠體對銅離子吸附的影響.......31 3-3.5 薄膜機械性質分析.................................31 3-3.6 薄膜含水及溶解測試...............................31 3-3.7 掃描式電子顯微鏡觀察表面型態及元素成分鑑定.......32 3-3.8 表面化學分析及元素鑑定...........................32 第四章　結果與討論.......................................33 4-1　幾丁聚醣薄膜膠體之性質..............................33 4-1.1　機械性質..........................................33 4-1.2　含水及溶解測試....................................34 4-2　幾丁聚醣薄膜膠體吸附分析............................36 4-2.1　表面形態及元素成份分析............................36 4-2.2　銅離子吸附分析....................................39 4-2.3 化學結構變化量測..................................40 4-2.4 表面化學鍵結分析..................................43 4-3　電漿改質幾丁聚醣薄膜膠體對銅離子吸附之分析..........48 4-3.1　銅離子吸附之變化..................................48 4-3.2　表面化學鍵結分析..................................49 結論.....................................................52 參考文獻.................................................53 自述.....................................................60

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