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系統識別號 U0026-0812200914332342
論文名稱(中文) 高分子奈米碳管複合材料之製備及其電熱性質之研究
論文名稱(英文) Fabrication of CNT/Phenolic Nano-Composite and Its Electrical & Thermal Conductivity Measurements
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) 陳碩穎
研究生(英文) Shuo-Ying Chen
電子信箱 p4695406@mail.ncku.edu.tw
學號 p4695406
學位類別 碩士
語文別 中文
論文頁數 65頁
口試委員 口試委員-鄭泗滄
指導教授-高騏
口試委員-蔡欣倫
口試委員-李乘清
中文關鍵字 奈米複合材料  奈米碳管  熱傳導係數  導電係數  酚醛樹脂  官能基化奈米碳管 
英文關鍵字 thermal conductivity  phenolic resin(PR)  functionalized CNTs  CNTs  nanocomposite  electrical resistivity 
學科別分類
中文摘要 自從發現奈米碳管以來,近10幾年來關於奈米碳管材料的性質及其應用的研究不曾間斷。這種新穎的一維奈米尺度材料,具有高強度與模數的特性,非常適合當作高分子的補強材;此外,其獨特的高熱傳導率及高導電率,使其可應用的範圍更為廣大。
本文即以研究多壁奈米碳管添加入酚醛樹脂的複合材料(MWNT/Phenolic),探討不同比例的碳管含量,對複合材料熱傳導係數及電性質的影響。我們使用酒精當溶劑,加入MWNT及酚醛樹脂,經由超音波震盪及磁石攪拌使其充分混和均勻後,放入適當的模具熱壓成型,再拿去量測。導電性使用四點探針量測,熱傳導係數則是使用熱傳導分析儀(Laser Flash LFA-447 Modify ASTM E1461) 量測。實驗結果可知,當奈米碳管濃度加至10 wt%,熱傳導係數由0.612 W/m*K提昇至1.473 W/m*K;而電性方面,導電度由0 ms提昇至135.52 ms,皆有明顯的提升。
為了更進一步將碳管分散於酚醛樹脂中,使用羧化的處理所得之羧化奈米碳管(c-MWNT)與介面活性劑SDS改質所得之SDS-MWNT,針對奈米碳管作不同的改質方法,探討其分散的狀況及對複合材料熱傳導係數及電性質的影響。由TEM可知,羧化後的碳管,其長度明顯變短;而經由介面活性劑SDS改值後的碳管,其外觀則無太大改變。經由分光光譜儀量測,羧化過的碳管,在酒精中的吸收光譜,比同濃度的SDS-MWNT及未改質的MWNT來的高,可推測具有較佳的分散效果。而經由SDS改質過的碳管,對於含同比例未改質碳管的複合材料,其熱傳導係數與導電度皆有提升。
英文摘要 Since discovery of the carbon nanotubes (CNTs), the material properties and their applications have been extensively studied over the last decade. This 1-D nano material has some excellent mechanical properties, such as, high tensile strength and Young’s modulus, is suitable for making into reinforced nano-composite. In addition, its unique superior thermal conductivity and relatively high electrical conductivity make its applicable range vaster. In this study, different proportions of multi-walled carbon nanotubes (MWNTs) were added into the phenolic resin for reinforcement, and the thermal & electric properties of the resulting nanocomposites were studied experimentally. This done by blending MWNTs with the phenolic resin dissolved in alcohol. After sonication and stirring at room temperature, the sample was then put it into proper mould in order for hot pressing to form square or circular ingot for measurements of electrical and thermal conductivity. The electrical conductivity was measured by four point probe method while the thermal conductivity was measured by thermoconductivity analyzer (Laser Flash LFA-447 Modify ASTM E1461). The results indicate that by adding MWNTs up to 10% in weight, the thermal conductivity of the nanocomposites can increase from 0.612 (W/m*K) to 1.473 (W/m*K) while the electric conductivity increase significantly from 0 (ms) to 135.52 (ms).
In order to further disperse the MWNTs in phenolic resin, two different methods to modify MWNTs, such as carboxyl MWNTs (c-MWNTs) and surfactant (SDS) modified MWNTs (SDS-MWNTs), were adopted. The thermal & electric properties of the nanocomposite reinforced with functionalized MWNTs were studied. The TEM images revealed that the length of c-MWNT was become much shorter, while the length of SDS-MWNT has no significant change. Measurements by UV-vis spectrophotometer indicate that for MWNTs dispersion in alcohol the absorption spectrum of c-MWNTs dispersion is much higher than both the SDS-MWNTs and the as grown MWNTs dispersion. This leads to the results that with better dispersion of SDS-MWNTs in phenolic resin, the thermal conductivity of SDS-MWNT/Phenolic resin nanocomposites is found indeed much higher despite that the surface structure of the MWNTs may be deteriorated by the chemical attack.
論文目次 授權書
簽署人須知
簽名頁
中文摘要
英文摘要
誌謝
目錄 I
第一章 緒論 1
1-1 前言 1
1-2 研究動機與目的 4
1-3 研究主題 6
第二章 文獻回顧 7
2–1 奈米複合材料特性 7
2–2 奈米碳管高分子複合材料 8
2–3 奈米碳管/酚醛樹脂複合材料 12
2–4 奈米碳管應用於複合材料的分散方法 15
第三章 實驗內容及程序 19
3–1 實驗材料 19
3–2 實驗儀器 20
3–3 多壁奈米碳管的改質 23
3–4 預混材的製作 24
3–5 預混材的熱壓合 24
3–6 實驗測試方法與程序 25
第四章 結果與討論 28
4-1 奈米碳管的改質與分散 28
4-2 奈米碳管/酚醛樹脂奈米複合材料 28
4-3 介面活性劑SDS改質奈米碳管/酚醛樹脂奈米複合材料 30
4-4 羧化改質奈米碳管/酚醛樹脂奈米複合材料 31
第五章 結論 33
參考文獻 35
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