利用超臨界二氧化碳方法接枝反應製作導電性有機-金屬氧化物無機混成材料之研究

文化大學機構典藏 CCUR > 理工學院 > 工學院 > 化學工程與材料工程學系暨碩士班 > 研究計畫 > Item 987654321/21523

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題名:	利用超臨界二氧化碳方法接枝反應製作導電性有機-金屬氧化物無機混成材料之研究
作者:	曾梨子
貢獻者:	化工系
關鍵詞:	有機-無機混成導電性高分子超臨界二氧化碳 organic-inorganic hybrid conducting polymer supercritical carbon dioxide
日期:	2009-08
上傳時間:	2012-02-24 09:56:38 (UTC+8)
摘要:	過去有許多學者專家投入有機-無機混成材料研究，目的是為了解決各材料應用領域的瓶頸。藉著有機材料本身的特性如高透明性、良好之接著性、交聯性等，以及無機材料許多優良的特性如高硬度、耐磨性、加工性、尺寸安定性、低膨脹係數及熱安定性等，由於兩者物性具有互補之作用，因此所開發出來的有機-無機混成新材料，所改變的物理現象包括材料的親疏水性、帶電性、極性、表面化學組成、表面粗糙度等。而每一研究主題，都先針對某些議題作深入的探討，以尋求一理想材料應用領域的革新。有鑑於此，本計畫也針對將導電性高分子接枝到無機材料為主題，以期能得到導電性之材料，並對接枝改質方法做深入的研究。本研究探討無機材料在超臨界流體中進行導電高分子的接枝反應成為有機-無機複合材料，第一年的研究成果，對於氧化矽基材在超臨界二氧化碳中以聚3,4-二氧乙烯塞吩(PEDOT)進行接枝反應之探討，完成二氧化矽基材的分析、接枝反應之超臨界溫度、壓力與反應時間之定性的探討，並以熱重分析解析PEDOT-SiO2 產物的接枝比例，結果顯示隨著超臨界二氧化碳壓力及反應時間的增加，可得到較好的接枝效果，在本研究探討的溫度條件下，323K 之反應溫度，相較於313K 及333K 具有較佳的接枝效果。熱重分析的結果顯示，當固定反應溫度、時間及反應物當量等條件，將超臨界壓力由120bar 提高至200bar 時PEDOT 的接枝量會由28.3 %提高至51.4%。基於第一年的研究成果，初步掌握了PEDOT-SiO2 產物的超臨界接枝反應條件趨勢，本研究後續兩年，除進一步深入探討反應參數如氧化劑濃度、反應物濃度外，產品將進行SEM 觀測並量測導電度，進行PEDOT-SiO2 之表面特性的探討，預期第三年度將進一步以不同基材如Al2O3、Ta2O5 等等在電容常用的閥金屬材料進行PEDOT 接枝反應的探討，觀察以SCCO2 為溶劑，導電性高分子PEDOT 接枝於不同基材的效果，以作為選用應用基材的參考，以期能提昇材料的特性，並增進相關應用產品的效能。 The organic-inorganic hybrid materials have been studied in the past to modify the properties of single material. The properties of organic material are transparent, good adhesion, high network links. Those for inorganic materials are higher hardness, thermal stability, and low expansivity. The improvements of the resulting hybrid include hydrophilic-hydrophobic properties, conductivity, polarity, and surface morphorogy. Each topic can be investigated to search for innovation in various application areas. Accordingly, the aim of this proposal is the grafting of conducting polymer onto metal oxide to obtained a conducting material. The grafting and modifying methods are investigated in this project. The Grafting reaction of conducting polymer onto the inorganic substrate via supercritical fluid is investigated in this study. At the first year of the study, we investigate the grafting of poly[3,4-ethylendioxidethiophene] (PEDOT) onto silicon oxide(SiO2) substrate. The properties of several SiO2 substrates have been measured. The temperature, pressure and time period conditions of grafting reaction in supercritical carbon dioxide have been investigated. The thermogravimetric analysis of PEDOT-SiO2 sample has been measured to verify the percentage of grafting. The grafting percentage will increase as pressure and reaction time period. The reaction temperature of 323K gives better grafting result with respect to 313K and 333K. The thermogravimetric anaylsis shows that the grafting percentage will increase from 28.3% to 51.4% when the supercritical pressure increase from 120 bar to 200 bar with fixed temperature and reaction time period. The organic-inorganic composites has been successfully synthesized in supercritical fluid. Base on the study of the first year, we will detailed verify the reaction factors such as concentration of oxidant and reactant in the second year. The conductivity of PEDOT-SiO2 sample will be measured and we will observe the morphology by SEM to identify the surface properties of PEDOT-SiO2 sample. In the third year, we will study the supercritical grafting reaction of PEDOT on different valve metal such as Al2O3、Ta2O5, which are commonly using in capacitors. We are expecting that some standards or references for the reactions of grafting conducting polymer PEDOT on inorganic substrates will be established through this study and the applications of the organic-inorganic materials will be improved.
顯示於類別:	[化學工程與材料工程學系暨碩士班] 研究計畫

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