臺灣博碩士論文加值系統

奈米碳管具有獨特的機械和電性能，可當作複合材料的增強劑，為新世代高性能奈米結構材料。近年來，利用多壁奈米碳管(multi-walled carbon nanotube, MWCNT)高強度、高硬度、高導電性和高導熱性之特性，期望能提升多壁奈米碳管/環氧基樹脂複合材料特性。但是奈米碳管的分散和介面鍵合力為主要影響奈米碳管增強複合材料性質主要因素。所以多壁奈米碳管/環氧基樹脂複合材料分散製程之研究為重要研究項目。
本研究目的利用田口品質工程法(Taguchi Method)針對多壁奈米碳管/環氧基樹脂複合材料進行穩健最佳化分散製程設計，獲得分散製程之最佳參數。同時對不同多壁奈米碳管含量之複合材料之阻尼比、電阻、阻抗和導電率進行分析研究。並利用有限元素分析(finite element analysis, FEA)及結合實驗模態分析(experimental modal analysis, EMA)，進行多壁奈米碳管/環氧基樹脂複合材料懸臂樑試片模型驗證，求得此結構之模態參數，即自然頻率與模態振型。及利用掃瞄電子顯微鏡(scanning electron microscope, SEM)觀察多壁奈米碳管/環氧基樹脂複合材料的分散情況。

Carbon nanotubes have the exceptional machine and electrical properties, and regard as reinforcement of the composite material for new generation high performance nanostructure materials. Recently, the properties high strength, high hardness, and high conductivity with high transmit heat of characteristic of MWCNT are widely expected to promote MWCNT/epoxy composite characteristic. But the dispersion and the interfacial bonding force of carbon nanotubes are considered as the main influences of carbon nanotubes-reinforced composites material factor. Therefore, the study of dispersion processing for MWCNT/epoxy composite is very importance research issue.
The purpose of this thesis is to use Taguchi Method to aim at MWCNT/epoxy composite to obtain the robust optimal parameters of dispersion processing. In the meantime, the damping ratio, resistance, impedance with conductivity of different wt. percentage of MWCNT content composite, are studied in detail. The finite element analysis (FEA) and experimental modal analysis (EMA) are to perform model verification for MWCNT/Epoxy composite cantilever beam, and to obtain modal parameters, such as natural frequency and mode shape. Finally, the scanning electron microscope (SEM) is used to observe the dispersion condition of MWCNT/epoxy composite.

摘要 I
Abstract...II
誌謝...IV
目錄...V
表目錄...X
圖目錄...XII
符號索引...XVI
第1章 緒論...1
1.1 研究背景與動機...1
1.2 全文概述...3
第2章 文獻回顧...4
2.1 奈米碳管結構...4
2.2 奈米碳管製造方法...7
2.3 奈米碳管力學性能及電學特性...9
2.3.1 力學性能...9
2.3.2 電學特性...12
2.4 奈米碳管/環氧基樹脂複合材料...13
2.4.1 環氧樹脂...13
2.4.2 奈米碳管/環氧基樹脂複合材料機械、電和阻尼性能...17
第3章 田口法原理...21
3.1 品質損失函數定義...21
3.1.1 傳統品質損失函數...21
3.1.2 品質損失函數(二次品質損失函數)...22
3.2 品質特性(目標函數值)的種類...23
3.3 直交表...24
3.4 田口法分析程序...25
3.4.1 定義目標函數...25
3.4.2 定義設計參數與水準...25
3.4.3 選擇直交表...25
3.4.4 平均數分析(ANOM)...26
3.4.5 變異數分析(ANOVA)...27
第4章 多壁奈米碳管/環氧基樹脂複合材料分散製程穩健設計...30
4.1 靜態最佳化設計...30
4.1.1 定義目標函數...32
4.1.2 定義設計參數水準與直交表...32
4.2 實驗方法與步驟...33
4.2.1 試片規格...33
4.2.2 實驗材料...34
4.2.3 實驗儀器...35
4.2.4 執行實驗...40
4.3 平均數分析(ANOM)...40
4.4 交互作用...43
4.5 變異數分析(ANOVA)...45
4.6 SEM分析...47
第5章 多壁奈米碳管/環氧基樹脂複合材料機電性質...50
5.1 多壁奈米碳管/環氧基樹脂複合材料之機械性質研究...50
5.2 多壁奈米碳管/環氧基樹脂複合材料導電性之檢測...53
5.2.1 LCR Meter原理...53
5.2.2 電阻與電導關係...53
5.2.3 阻抗與導納關係...54
5.2.4 實驗量測與儀器使用步驟...55
5.3 多壁奈米碳管/環氧基樹脂複合材料之阻尼比特性...61
5.3.1 理論公式...61
5.3.2 試片製作過程...63
5.3.3 阻尼比實驗...64
第6章 多壁奈米碳管/環氧基樹脂複合材料之模型驗證...70
6.1 MWCNT/Epoxy複合材料懸臂樑製作過程...70
6.2 問題定義與分析目標...71
6.2.1 問題定義...71
6.2.2 分析目標...72
6.3 有限元素分析...73
6.4 實驗模態分析...74
6.4.1 實驗儀器架構...74
6.4.2 量測點規劃與實驗方法...75
6.5 結果與討論...75
6.5.1 MWCNT/Epoxy懸臂樑試片頻率響應函數驗證...75
6.5.2 Epoxy懸臂樑試片頻率響應函數驗證...78
6.5.3 MWCNT/Epoxy與Epoxy懸臂樑試片頻率響應函數比較...80
6.5.4 模態參數驗證...81
第7章 結論與建議...88
7.1 MWCNT/Epoxy複合材料之分散製程穩健設計方面...88
7.2 MWCNT/Epoxy複合材料之機電性質...88
7.3 MWCNT/Epoxy複合材料之模型驗證...89
7.4 檢討與建議...89
7.5 未來發展...90
參考文獻...91
作者簡介...95

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