臺灣博碩士論文加值系統

本研究透過共價改質石墨烯微片，在表面上接枝馬來酸酐(MAH)，改善其在環氧樹脂中的分散性，同時補強環氧樹脂基材與碳纖維補強材間的介面強度。實驗過程中，先將石墨烯微片(GNPs)和奈米碳管(CNTs)混摻製成樹脂試片，探討機械性質並找出最佳配比；並以此配比製作積層板複合材料，探討添加量對機械強度、環境效應和扭轉疲勞測試的影響。
由實驗結果得知，在GNPs/CNTs混摻比例9/1時，有最佳的組合結構，在樹脂與纖維介面有較好的協同效果；製成積層板試片後，以添加1.0 wt%的纖維複合材料在機械性質的表現上為最佳。靜態機械測試中，相較於純纖維積層板，彎曲強度提升17.48%，層間剪切強度更提升了40.03%，扭矩提升36.66%，抗衝擊強度則上升21.20%，應變能釋放率更提升84.87%；環境效應中以高溫高濕(85℃/85%RH)複合環境其強度下降量最大，接著是濕度效應(25℃/85%RH)造成基材吸濕膨脹，溫度因子(85℃/65%RH)則影響最少；動態疲勞測試中，添加奈米補強材可以抑制疊層板內部脫層產生而延長試片在低扭轉角度下的疲勞壽命，並根據數據結果以統計學最小平方法做線性迴歸曲線，評估不同角度下的疲勞週次。
由掃描式電子顯微鏡觀察破壞斷面可發現，添加奈米補強材料使斷面變得粗糙不規則，主要是因為裂縫在成長過程中，會因為石墨烯微片和碳管而偏折方向，使裂縫延伸鈍化而在強度上明顯提升。

第一章 緒論 1
1-1 前言 1
1-2 研究動機 3
1-3 研究目的 5
第二章 文獻回顧 6
2-1 複合材料疲勞性質 6
2-1-1 材料破壞模式 6
2-1-2 應變能量釋放率 7
2-1-3 複合材料之破壞機制 7
2-1-4 應力(S)與疲勞週次(Nf)曲線(S-N curve) 9
2-2 環氧樹脂 10
2-2-1 環氧樹脂性質與應用 10
2-2-2 環氧樹脂硬化反應機制 10
2-3 奈米碳管 11
2-4 石墨烯 11
2-5 碳纖維補強複合材料 12
2-6 奈米補強材於複合材料之機械與疲勞性質 13
2-6-1 奈米補強材於環氧樹脂中之分散性 13
2-6-2 奈米補強材於高分子材料之機械性質探討 14
2-6-3 奈米補強材於碳纖維積層板之機械性質探討 16
2-7 溫濕效應對複合材料之影響 17
第三章 實驗方法 19
3-1 實驗材料與試劑 19
3-2 實驗設備與儀器 20
3-2-1 工作設備 20
3-2-2 測試儀器 22
3-3 試片製備流程 26
3-3-1 石墨烯微片/奈米碳管/環氧樹脂試片製備 26
3-3-2 石墨烯微片/奈米碳管/纖維積層板試片製備 27
3-4 實驗測試方法 28
3-4-1 測試方法及流程 28
3-4-2 環境效應測試 31
3-4-3 動態扭轉疲勞測試(Dynamic Torsion Fatigue Test) 32
第四章 結果與討論 33
4-1 材料鑑定分析 33
4-1-1 FI-IR官能基鑑定分析 33
4-1-2 TEM形態學觀察 34
4-2 改質石墨烯微片/環氧樹脂複合材料機械性質 34
4-3 改質石墨烯微片/奈米碳管/環氧樹脂複合材料機械性質研究 35
4-3-1 拉伸強度測試分析 35
4-3-2 彎曲強度測試分析 36
4-3-3 衝擊強度測試分析 36
4-3-4 改質石墨烯微片/奈米碳管/環氧樹脂複合材料綜合討論 37
4-4 改質石墨烯微片/奈米碳管/纖維積層板複合材料之物理性質 39
4-4-1 熱性質分析 39
4-5 改質石墨烯微片/奈米碳管/纖維積層板複合材料機械性質之研究 40
4-5-1 彎曲強度測試分析 40
4-5-2 層間剪切強度測試分析 41
4-5-3 扭轉測試分析 41
4-5-4 抗衝擊強度測試分析 42
4-5-5 破裂韌性測試分析 43
4-6 改質石墨烯微片/奈米碳管/纖維積層板複合材料溫濕度預處理機械性質之研究 44
4-6-1常溫高濕(25℃/85%RH)預處理機械強度分析 44
4-6-2高溫常濕(85℃/65%RH)預處理機械強度分析 45
4-6-3高溫高濕(85℃/85%RH)預處理機械強度分析 46
4-6-4 溫濕預處理機械強度綜合比較 47
4-7 改質石墨烯微片/奈米碳管/纖維積層板複合材料動態扭轉疲勞測試之研究 48
4-8 SEM破壞斷面表面形貌 52
4-8-1 環氧樹脂破壞斷面觀察 52
4-8-2 纖維積層板破壞斷面觀察 53
第五章 結論 55
5-1 結論 55
5-2 未來展望 56
參考文獻 57
附表….. 64
附圖….. 72

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