本研究提出的聚谷氨酸甲酯 [Poly (γ-methyl l-glutamate), PMLG] /聚偏氟乙烯 [Poly (vinylidene fluoride), PVDF] 複合壓電纖維，乃藉由PMLG與PVDF聚合物溶液之共混，形成濃度30.68 wt%之PMLG/PVDF高分子混摻溶液，並由近場電紡（Near-field electrospinning, NFES）製程的高壓電場（1×107-1.6×107 V/m）作用，使溶液突破表面張力形成泰勒錐（Taylor cone），進而形成有序的PMLG/PVDF複合壓電纖維（線徑17.25-7.62 μm）於滾筒收集裝置（切線速度 1256.64 mm/s）。研究中透過微差式掃描熱卡計（Differential scanning calorimetry, DSC）、傅利葉轉換紅外線光譜儀（Fourier transform infrared spectroscopy, FTIR）與拉伸實驗，來探討施加電場對結構變化與機械性質的影響。研究發現當PMLG/PVDF溶液在電場的作用下，可提升電偶極之取向，獲得最高抗拉強度27.47 MPa與楊氏係數2.77 GPa之複合壓電纖維。最後，貼附PMLG/PVDF複合壓電纖維於平行電極上，製成可撓式PMLG/PVDF能量擷取裝置，經由拍打測試可獲得最大電壓0.08 V與功率637.81 pW，其機電轉換效率相對於PMLG或PVDF所製造而成的能量擷取裝置而言，有1-3倍的提升。由此證實PMLG/PVDF複合壓電纖維具備優異的壓電性質，因此可被廣泛應用於生物工程、綠色能源、可穿戴式傳感器與能量擷取器等領域。

In this study, the technology of near-field electrospinning (NFES) is developed to collect orderly poly (γ-methyl L –glutamate) (PMLG)/poly (vinylidene fluoride) (PVDF) fiber composites with enhanced piezoelectricity. PMLG solution was blended with PVDF solution uniformly to prepare PMLG/PVDF solution (30.68 wt%). When the droplet of polymer blend overcame the surface tension of PMLG/PVDF solution to form Taylor cone at high electric field of 1×107-1.6×107 V/m, a PMLG/PVDF piezoelectric fiber (diameter=17.25-7.62 µm) was spun from the tip of Taylor cone and collected on a rotating glass collector orderly at the tangential velocity of 1256.64 mm/s. Fourier transform infrared (FTIR) spectroscopy and differential scanning calorimetry (DSC) were used to analyze structure interaction and secondary structure within the blends of PMLG/PVDF polymers. NFES process has a positive impact on the PMLG/PVDF piezoelectric properties, which can make dipole a better orientation. The ultimate stress (27.47 MPa) and Young’s modulus (2.77 GPa) of the optimum PMLG/PVDF fiber composites were measured by micro-tensile testing. Finally, PMLG/PVDF piezoelectric fiber composites were patterned on a PET-based structure with parallel electrodes as a flexible PMLG/PVDF energy harvester to capture ambient energy. By vibrating test, the maximum peak voltage (0.08 V) and power (637.81 pW) can be obtained. The electro-mechanical energy conversion efficiency of the PMLG/PVDF energy harvester is 1-3 fold higher than PVDF or PMLG energy harvester. PMLG/PVDF piezoelectric fiber composites with good piezoelectricity could promote the applications in various fields such as biomedical engineering, green energy, wearable sensors, and energy harvesters.

論文審定書 I
致謝 II
摘要 III
Abstract IV
圖目錄 VIII
表目錄 XII
第一章 緒論 1
1-1 前言 1
1-2 研究背景與動機 1
1-3 研究目的 2
1-4 本文架構 3
第二章 文獻回顧 4
2-1 壓電效應 4
2-1-1 正壓電效應 4
2-1-2 逆壓電效應 5
2-1-3 極化處理 5
2-2 壓電材料相關研究 6
2-3 電紡製程 8
2-4 電紡PVDF之相關研究 12
2-5 電紡PMLG之相關研究 13
2-6 壓電操作模式 18
第三章 研究方法 19
3-1 先驅溶液調配流程 20
3-1-1 材料備製 20
3-1-2 調配先驅溶液步驟 22
3-2 近場電紡製程 25
3-3 近場電紡製程之設備 26
3-4 能量擷取裝置製作 28
3-5 實驗儀器 31
第四章 結果與討論 46
4-1 製程參數 46
4-1-1 先驅溶液參數 46
4-1-2 近場電紡製程參數 49
4-2 結構分析 64
4-2-1 DSC量測 64
4-2-2 FTIR量測 65
4-3 拉伸實驗 69
4-4 電性量測 75
4-4-1 固定頻率下之電性量測 75
4-4-2 力量（N）、輸出電壓（V）與頻率（Hz）的關係 79
4-4-3 匹配阻抗與最大輸出功率 82
第五章 結論及未來展望 84
5-1 結論 84
5-2 未來展望 85
參考文獻 86

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