二氧化鈦/多壁奈米鈦管之電磁波屏蔽性質研究

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研究生：	歐洋 Ou, Yang
論文名稱：	二氧化鈦/多壁奈米鈦管之電磁波屏蔽性質研究 Study on electromagnetic-Interference Shielding on multi-walled Carbon Nanotube/Titanium Dioxide Composites
指導教授：	徐文光 Hsu, Wen-Kuang
口試委員:	許景棟 Hsu, Ching-Tung 呂昇益 Lu, Sheng-Yi
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：	2014
畢業學年度：	102
語文別：	中文
論文頁數：	56
中文關鍵詞：	奈米碳管、二氧化鈦、電磁波屏蔽
相關次數：	點閱：2 下載：0
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本實驗主要探討以聚二甲基矽氧烷(PDMS)為基材，加入不同濃度的多壁奈米碳管/二氧化鈦複合材料，進行電磁波屏蔽效應的量測，並以介電係數、阻抗等數值來分析電磁波屏蔽的機制。
研究中藉由溶膠凝膠法(sol-gel)使多壁奈米碳管表面包覆均勻金紅石相(rutile)的二氧化鈦，我們發現添加二氧化鈦可以有效提升反射損失的效果，也觀察到此聚二甲基矽氧烷/多壁奈米碳管/二氧化鈦複合物的電磁波屏蔽主要的機制為反射損失，次要機制為吸收損失。

Electromagnetic shielding (EMI) of composites made from PDMS and TiO2 coated multi-walled carbon nanotubes is studied and permittivity and impedance are also measured to discuss the dielectric properties of the composites. Results suggest that TiO2 coatings produce a synergistic effect in reflection mechanism.

摘要    I
Abstract    II
致謝    III
總目錄    V
圖目錄    VIII
第一章    文獻回顧    1
1-1    奈米碳管的基本結構    1
1-2奈米碳管的基本電性    3
1-3奈米碳管的合成    6
1-3-1電弧法    6
1-3-2雷射蒸發法    7
1-3-3化學氣相沉積法    7
1-4電磁波屏蔽理論    9
1-4-1反射損失(Reflection loss)    9
1-4-2吸收損失(Absorption loss)    10
1-4-3多重反射損失(Multi-reflection loss)    10
1-4-4 電磁波屏蔽效率    11
1-5 二氧化鈦的基本結構    14
1-5-1金紅石相    15
1-5-2銳鈦礦相    16
1-6    二氧化鈦的介電性質    17
第二章 實驗動機    19
第三章 實驗步驟    20
3-1實驗藥品與儀器    20
3-1-1實驗藥品與儀器設備型號    20
3-1-2聚二甲基矽氧烷(PDMS)之基本性質    21
3-2實驗流程    23
3-2-1 Sol-gel製備二氧化鈦/多壁奈米碳管複合物流程圖    23
3-2-2 本實驗總流程圖    24
3-3實驗步驟    25
3-3-1溶膠凝膠法(sol-gel)製作二氧化鈦/奈米碳管複合材料步驟    25
3-3-2 製備MWCNTs/TiO2/PDMS複合材料之步驟    26
3-3-3 材料分析與量測    27
第四章 實驗結果與討論    28
4-1 MWCNTs/TiO2複合材 掃描式電子顯微鏡(SEM)分析    28
4-2 X光能量散射光譜儀(EDS)分析    32
4-3 X光繞射(XRD)分析    33
4-4熱重分析(TGA)    35
4-5介電係數與電磁波屏蔽量測    37
4-5-1 A組試片    41
4-5-2 B組試片    47
第五章 結論    53
參考文獻    54

                                

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