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系統識別號 U0026-0812200914333052
論文名稱(中文) 奈米碳管表面改質與複合材料合成之電性和導熱性量測
論文名稱(英文) Surface Modification of CNT and Synthesis of Polymer Composites for Measurement of Electrical Properties
校院名稱 成功大學
系所名稱(中) 航空太空工程學系碩博士班
系所名稱(英) Department of Aeronautics & Astronautics
學年度 96
學期 2
出版年 97
研究生(中文) 莊宴惠
研究生(英文) Yan-Huei Juang
電子信箱 p4695138@mail.ncku.edu.tw
學號 P4695138
學位類別 碩士
語文別 中文
論文頁數 76頁
口試委員 口試委員-王年豪
指導教授-高騏
口試委員-陳志勇
中文關鍵字 奈米碳管  官能基化奈米碳管  導電係數  聚對苯二甲酸乙烯酯  熱傳導係數  奈米複合材料 
英文關鍵字 nanocomposite  thermal conductivity  electrical resistivity  CNTs  functionalized CNTs  PET 
學科別分類
中文摘要 填充型導電高分子其高分子本身並不導電,藉由加入導電的添加物填充於高分子中,以使其具導電性。本實驗利用硫酸與硝酸(3:1)的混合酸化學改質破壞奈米碳管表面及其長度並製備不同官能基的碳管粉末-羧酸基(-COOH)的碳管、以醯化(-COCl)處理碳管、十二烷基磺酸鈉(SDS)包覆的碳管;以高分子材料聚對苯二甲酸乙烯酯(PET)為母體摻雜於改質過後的多壁奈米碳管,利用球磨混合及熱壓成型的方法製備多壁奈米碳管-聚對苯二甲酸乙烯酯之奈米複合材料,並量測其導電性與導熱性。
研究後觀察高溫酸處理過後的多壁奈米碳管於有機溶劑中(ex.甲醇)分散性較佳,但摻雜塑化成膜後發現因長度過度切短而造成電阻值偏高,並比較純的PET(熱傳導係數值為0.194 W/m*K)與摻雜不同官能基粉
末的複合材料混合成膜時所測得的導熱係數,加入改質CNT的複合材料其導熱係數皆有提高的現象,經由酸處理50oC的CNT在2wt%的重量百分比可提高導熱性到51%,故其導熱現象在摻雜碳管後有較佳的情況。
英文摘要 Polymer materials which do not conduct electric current can become conductive by adding small amount of conductive nanomaterials. The current experiments demonstrate that by blending small amount of functionalized multiwall carbon nanotubes (MWNTs) with PET to form nanocomposite the PET-MWNTs can become conductive effectively both electrically and thermally. Three different methods of functionalization for the MWNTs are adopted. The first one uses solution of sulfuric acid mixed with nitric acid at a ratio of 3:1 to heat up and boil the MWNTs such that the surface of MWNTs is attached with carbonyl group. The second method uses the solution of SOCl2(20ml)+DMF(1ml) to heat and soak the MWNTs that was already acidic treated by the previous method such that the surface of MWNTs is attached with acryl chloride group. The third method is to soak the as grown MWNTs in SDS solution. The dispersion property of the functionalized MWNTs was tested in methanol by the light absorption of the mixed solvent at UV-vis spectrum. The acidic treated MWNTs by the first method have a much better dispersion. The functionalized MWNTs are then blending with the polyester powder in a planetary mill. The mixed powder was then hot
pressed to form a solid film in order for both the electric and thermal conductivity measurements. The results indicate that the resistivity of the PET blending with the as grown MWNTs has the lowest value while the resistivity of the PET blending with the acidic treated MWNTs with the first method has the highest value. However, the thermal conductivity of the PET blending with acidic treated MWNTs can increase up to 51% at 2wt% MWNT of the content and the result indicate that the thermal conductivity measurements of the PET blending with the as grown MWNTs are better. More discussion on these issues will be presented in the paper.
論文目次 授權書
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中文摘要
英文摘要
致謝
目錄....................................................................................................................I
圖目錄.............................................................................................................. V
第一章 緒論 1
1-1 前言 1
1-2 研究動機與目的 1
1-3 研究方向 2
第二章 文獻回顧 5
2-1 奈米碳管(Carbon nanotube;CNT) 5
2-2-1 結構與基本特性 5
2-2-2 奈米碳管之性質 5
2-2 純化奈米碳管 7
2-2-1 氧化法 7
2-2-2 以嵌入觸媒後進行氧化 9
2-2-3 過濾法 10
2-2-4 層析法 10
2-2-5 微波加熱法 10
2-2-6 超音波輔助法 11
2-3 奈米碳管的應用 11
2-4 奈米碳管表面有機化改質分類 12
2-5 聚對苯二甲酸乙烯酯(Poly ethylene terephthalate) 13
2-5-1 PET的特性 14
2-5-2 PET的加工與應用 15
第三章 實驗方法 16
3-1 實驗材料 16
3-2 實驗儀器 18
3-3 實驗步驟 21
3-3-1 碳管改質之官能基化 21
3-3-1a 羧化奈米碳管(c-MWNTs) 21
3-3-1b 醯化奈米碳管(a-MWNTs) 21
3-3-1c SDS表面包覆改質 22
3-3-2 製備PET/奈米碳管複合材料 24
3-4 實驗分析 26
3-4-1 奈米碳管之定量分析 26
3-4-2 熱壓後SEM樣品製備與電性量測 27
3-4-3 熱傳導係數量測 28
第四章 結果與討論 30
4-1 奈米碳管酸處理後特性分析 30
4-1-1 羧化奈米碳管(c-MWNTs) 30
4-1-2 醯化奈米碳管(a-MWNTs) 32
4-1-3 SDS表面包覆奈米碳管 32
4-2 各種碳管雜PET 33
4-2-1 羧化奈米碳管雜PET(c-MWNTs/PET) 33
4-2-2 醯化奈米碳管雜PET(a-MWNTs/PET) 34
4-2-3 SDS奈米碳管雜PET ( SDS-MWNTs/PET) 35
4-2-4 碳管的材料特性 35
4-2-4.a拉曼分析 35
4-2-4.b Uv-vis 36
4-2-4.c FT-IR 37
4-2-4.d XRD 38
4-3 電性量測 39
4-3-1 導電性量測 39
4-3-2 熱傳導性質分析 39
第五章 結論 41
參考文獻 43
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