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研究生： 袁惠卿
Yuan, Hui-Ching
論文名稱： 奈米鑽石/薄層石墨烯複合材料之熱傳導性質研究
Investigation on the Thermal Properties of Nanodiamond/Thin-layer Graphene Composite films
指導教授： 李紫原
Lee, Chi-Young
戴念華
Tai, Nyan-Hwa
口試委員: 葉孟考
Yeh, Meng-Kao
徐文光
Hsu, Wen-Kuang
學位類別： 碩士
Master
系所名稱： 工學院 - 材料科學工程學系
Materials Science and Engineering
論文出版年： 2017
畢業學年度： 105
語文別： 中文
論文頁數： 99
中文關鍵詞： 石墨烯 、奈米鑽石 、聚多巴胺 、高異向性熱傳導係數
外文關鍵詞： graphene, nanodiamond, polydopamine, anisotropic thermal conductivity
相關次數： 點閱：2  下載：0 
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    • 由於電子元件的微型化，使得散熱問題漸趨備受重視，因此，本研究的目的在於製備一種具有高導熱效率之薄膜材料，並期藉由調整材料的組成，改變其熱傳遞路徑，進而得以設計在垂直元件方向與平行元件方向上的異向性，而應用於電子產業中熱管理相關領域。
    本實驗利用真空抽濾法及高溫熱處理(800C)的環境，製備出含奈米鑽石(ND)與石墨烯(rGO)之複合膜(ND/rGO)以及包覆聚多巴胺之奈米鑽石(ND-pDA)與石墨烯(rGO)之複合膜(ND-pDA/rGO)，並利用雷射閃光法量測其在平行平面方向(in-plane)與垂直平面方向(through-plane)之熱傳導係數。本研究探討多巴胺的添加對複合膜形貌及熱傳性質的影響，並比較不同ND-pDA添加量對導熱異向性造成的改變，接著再將複合膜置於不同溫度下量測其熱傳性質，以探討變溫下熱傳導特性的變化。
    實驗結果顯示，多巴胺的添加可使ND-pDA/rGO複合膜維持有利於聲子傳遞的緊密結構；此外，其熱還原後所形成的碳殼亦可大幅提升熱傳導性質。當ND-pDA添加量增加時，through-plane方向之熱傳導係數(K)隨之增加；in-plane方向之熱傳導係數(K//)則隨之漸減。在25C下，當ND-pDA/rGO複合膜內ND含量由20 mg增加至80 mg時，K由0.677 W/mK上升至1.004 W/mK，而K//則由1406.2 W/mK下降至457.2 W/mK；意即複合膜之熱傳異向性(K///K)隨著ND-pDA的添加而下降。當溫度上升至100 oC時，含有20mg ND之ND-pDA/rGO複合膜(20ND-pDA/20rGO)之K與K//皆分別提升至0.882 W/mK 與1899.7 W/mK。由此可知，本實驗所製備之ND-pDA/rGO複合膜即使於高溫下仍具高導熱性，且其熱傳導異向性亦具可調性，故能達到重量輕之高散熱薄膜材料的目標。

    Owing to the development of miniaturization of modern electronic devices, effective thermal management becomes a key issue to prevent the devices from overheating. Therefore, fabrication of lightweight thin films with tunable thermal anisotropy has attracted much attention recently.
    In this work, we successfully fabricated ND-pDA/rGO hybrid films using the vacuum-filtration process followed by a heat treatment at 800C. The thermal conductivities in in-plane (K//) and through-plane (K) directions were measured by the laser flash method to better understand how the addition of dopamine, the amount of ND-pDA, and temperature affected the thermal properties of the hybrid films.
    The experimental results showed that the addition of dopamine could maintain the dense structure of ND-pDA/rGO hybrid films, which is favorable for phonon transport, and thus remarkably increased their thermal properties. Besides, film with lower ND-pDA loading possessed higher in-plane but lower through-plane thermal conductivity. K was increased from 0.677 W/mK for 20ND-pDA/20rGO to 1.004 W/mK for 80ND-pDA/20rGO while K// was decreased from 1406.2 W/mK to 457.2 W/mK at 25C. Therefore, the anisotropy of thermal conductivity (K///K) was decreased with the amount of ND-pDA. As temperature increased to 100C, both the K// and K of 20ND-pDA/20rGO were increased to 1899.7 W/mK and 0.882 W/mK, respectively. Maintaining such high thermal conductivities at high temperature, the hybrid films were believed to achieve the goal for thermal interface materials with lightweight and high heat transfer properties.

    摘要 I Abstract II 目錄 III 表目錄 VII 圖目錄 VIII 第一章 緒論 1 1.1 前言 1 1.2 研究動機 2 第二章 文獻回顧 3 2.1 石墨烯的簡介 3 2.1.1 石墨烯的結構與特性 3 2.1.2 石墨烯的製備方法 4 2.2 奈米鑽石的簡介 7 2.2.1 奈米鑽石的結構與特性 7 2.2.2 奈米鑽石的製備方法 8 2.3 熱傳導性質的簡介 10 2.3.1 熱傳遞原理 10 2.3.2 熱傳導性質的量測方法 12 2.3.3 碳材料的熱傳導性質 15 第三章 實驗方法與分析 32 3.1 實驗用化學藥品及設備 32 3.1.1 實驗用化學藥品 32 3.1.2 電磁攪拌加熱器 33 3.1.3 高速離心機 33 3.1.4 超音波震盪機 33 3.1.5 水循環抽濾系統 34 3.1.6 真空高溫爐 34 3.2 實驗步驟及方法 35 3.2.1 氧化石墨烯的製備 35 3.2.2 氧化石墨烯薄膜及石墨烯薄膜的製備 36 3.2.3 奈米鑽石/石墨烯複合膜的製備 36 3.2.4 奈米鑽石-聚多巴胺/石墨烯複合膜的製備 37 3.3 性質分析 38 3.3.1 場發射掃描式電子顯微鏡 38 3.3.2 原子力顯微鏡 39 3.3.3 X光繞射分析儀 39 3.3.4 拉曼光譜儀 39 3.3.5 傅立葉轉換紅外光譜儀 40 3.3.6 X射線光電子能譜儀 40 3.3.7 穿透式電子顯微鏡 41 3.3.8 雷射閃光法熱擴散係數分析儀 42 3.3.9 四點探針量測儀 43 第四章 結果與討論 49 4.1 石墨烯之分析 49 4.1.1 掃描式電子顯微鏡之形貌觀察 49 4.1.2 原子力顯微鏡形貌分析 50 4.1.3 X光繞射光譜分析 50 4.1.4 拉曼光譜分析 51 4.1.5 傅立葉轉換紅外光譜分析 52 4.1.6 高解析電子能譜分析 52 4.2 奈米鑽石之分析 53 4.2.1 掃描式電子顯微鏡之形貌觀察 53 4.2.2 X光繞射光譜分析 53 4.2.3 拉曼光譜分析 54 4.2.4 穿透式電子顯微鏡之微結構觀察 54 4.3 奈米鑽石/石墨烯複合膜之分析 55 4.3.1 掃描式電子顯微鏡之形貌觀察 55 4.3.2 X光繞射光譜分析 56 4.3.3 拉曼光譜分析 56 4.3.4 高解析電子能譜分析 567 4.4 熱傳導性質之分析 58 4.4.1 添加多巴胺對奈米鑽石/石墨烯複合膜的熱傳導係數之影響 58 4.4.2 不同奈米鑽石-聚多巴胺添加量對熱傳導係數之影響 61 4.4.3 溫度對熱傳導係數之影響 62 4.4.4 熱傳導係數之異向性 63 4.4.5 片電阻之量測 64 第五章 結論 93 參考文獻 95

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