臺灣博碩士論文加值系統

羥丙基甲基纖維素(HPMC)屬於軟質材料受壓後容易變形使其應用受限，吾人將金屬或金屬氧化物奈米鋁、銅粒子以及當作分散劑的Span80加入HPMC中製備出複合膜，提升HPMC薄膜抵抗負載的能力及改善其磨潤性質。
研究顯示Span 80作為分散劑可以在奈米粒子周圍產生空間位阻(Steric stabilization)的穩定性機制使奈米粒子得以和溶劑形成穩定的奈米懸浮液，在混入HPMC後製備出更加穩定的複合溶液。複合膜內的奈米粒子具有承受負載的能力，負載能力增強且相對的真實接觸面積較小，因此金屬奈米添加物複合膜之摩擦係數及磨耗率得以降低。金屬氧化物奈米添加物在磨耗的過程中作為三體，留在磨痕內與對磨件接觸並藉由滾動來調節介面間的速度差，因此磨潤性質有顯著的提升。
實驗後的複合膜溶回複合溶液內並將其稀釋後注入過濾設備中，濾紙及濾膜將大於濾徑的奈米粒子逐步過濾，使粒子與溶液得以分離，避免奈米粒子流入環境造成汙染。

Hydroxypropyl methylcellulose (HPMC) is a kind of biopolymer with the character-istics of biodegradability, environment friendly, great mechanical properties and tribological properties. Therefore, it is suitable to develop as substituted materials of plastic. However, HPMC deforms easily when it bears the loading, causing real con-tact area and the adhesive force between HPMC and counter(AISI52100) increase, so that the HPMC film is easily damaged due to adhesive wear, and leading to lose efficacy on wear resistance. Hence, nanoparticles(NPs) Al, Cu, Al2O3, CuO have been used as fillers, by means of procedure, nano- suspension with dispersant (Span80) were prepared, and mixed with HPMC solution to prepare composite solu-tions and composite films. The study examined the basic properties (quality analysis, thickness, surface roughness, morphology), load capacity and macro-scale tribologi-cal behaviors. Results showed that Span80 could provide steric stabilization, and dispersed the NPs effectively in suspension. After suspension mixed with HPMC so-lution, HPMC made composite solution more stable. The load capacity of composite film remarkably enhanced, especially Cu/HPMC composite film. In terms of tribo-logical behaviors, the NPs Al and Cu occur deformation after wear test of low load-ing, the wear resistances had rose. Spherical CuO and sphere-like Al2O3 occurred rolling effect as third-body at interface during the test, so that the coefficient of fric-tion and wear rate decreased significantly. Since HPMC is soluble in water and or-ganic solvents (ethanol, and so on), the composite solution could be separated into additive and solution easily by appropriate pore size of filters, preventing pollution and recycling limited resources.

口試合格證明 I
摘要 II
Extended abstract III
誌謝 XI
總目錄 XIII
表目錄 XVI
圖目錄 XVII
第1章 緒論 1
1-1 前言 1
1-2 研究動機 1
第2章 文獻回顧 2
2-1 奈米粒子及奈米懸浮液 2
2-2 聚合物/奈米粒子複合 7
2-3 聚合物及奈米粒子之汙染 10
2-4 羥丙基甲基纖維素 11
2-5 Span 80 13
2-6 三體理論 14
2-7 奈米粒子對磨耗之影響 18
第3章 實驗內容 20
3-1 實驗目的 20
3-2 實驗簡介 20
3-3 實驗流程 21
3-4 實驗方法 22
3-4-1 複合溶液製備流程 22
3-4-2 奈米懸浮液穩定性分析 26
3-4-3 基板準備及成膜 27
3-4-4 奈米懸浮液穩定性分析 28
3-4-5 化學成分分析 29
3-4-6 組織結構和表面幾何性質分析 30
3-4-7 膜厚量測 31
3-4-8 機械性質分析 32
3-4-9 磨耗試驗與分析 34
3-4-10 奈米粒子分離實驗 36
3-5 實驗設備 37
第4章 實驗結果與討論 39
4-1 複合溶液的穩定性 39
4-1-1 TEM 39
4-1-2 沉澱實驗 42
4-1-3 動態光散射儀量測 46
4-2 複合膜基本性質分析 50
4-2-1 化學性質 50
4-2-2 表面形貌及表面幾何性質 55
4-2-3 鍍膜厚度 62
4-3 機械性質 65
4-4 巨觀磨潤性質分析 69
4-4-1 磨耗試驗2 N, 50 m, 0.03 m/s 69
4-4-2 金屬奈米粒子添加物之磨潤行為 72
4-4-3 金屬氧化物奈米粒子添加物之磨潤行為 85
4-5 奈米粒子分離實驗 101
第5章 總結 106
5-1 實驗重點整理 106
5-2 結論 108
5-3 未來展望 108
參考文獻 109

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