鈦酸鋇奈米線/聚(偏氟乙烯-三氟乙烯)奈米發電複合纖維

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姓名

蔡惟捷(Wei-Chieh Tsai) 查詢紙本館藏

畢業系所

化學工程與材料工程學系

論文名稱

鈦酸鋇奈米線/聚(偏氟乙烯-三氟乙烯)奈米發電複合纖維

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摘要(中)

本研究主題是利用電紡絲技術製備具有壓電性質之鈦酸鋇奈米線/高分子奈米複合纖維。首先利用兩段式水熱法合成鈦酸鋇。第一階段是以鐵氟龍密封之不鏽鋼水熱罐製備鈦酸奈米線，主要挑戰是找出適當之反應條件。第二階段則須在維持相同之一維形貌下，將鈦酸轉化為鈦酸鋇奈米線。我們發現只需以90oC加熱一小時即可達成。將獲得之鈦酸鋇奈米線以不同之比例，分散於聚(偏氟乙烯-三氟乙烯)(P(VDF-TrFE))的溶液中，並透過調整DMF/丙酮溶劑之比例，得到不同固含量之電紡前驅溶液。然後改變極化電場強度及前趨溶液流速，以能電紡出不同直徑與形貌的奈米複合纖維。在金屬電極基板上收集到的複合纖維膜，需要做統一規格的裁切，並黏貼上電極，再以PDMS封裝，以獲得曲折後可以回復且發電之複合膜。我們主要是要測試添加不同量之鈦酸鋇對P(VDF-TrFE)高分子晶相以及發電能力之影響。最後發現，添加越多鈦酸鋇奈米線者，曲折後可以產生越高的電壓。我們最多可以添加16% 體積分率之鈦酸鋇奈米線。所獲得之複合纖維膜發電效果為純P(VDF-TrFE)纖維膜四倍之多。

摘要(英)

We have successfully fabricated a flexible nanofibrous mat of piezoelectric composite through the electrospinning of a P(VDF-TrFE) and BaTiO3 (BT) nanowire mixture. This mat forms a cost-effective and eco-friendly (lead-free) nanogenerator after encapsulated with PDMS. The P(VDF-TrFE) (poly(vinylidene fluoride trifluoroethylene) is known for its piezoelectric property and is employed as the matrix for our composite. The BaTiO3 nanowire was produced from the reaction of Ba(OH) with the titanate nanowire, which was synthesized through the hydrothermal treatment of TiO2 (Degussa P25) in 10M NaOH solution and HCl wash afterward. The BT material obtained have been characterized by X-ray diffraction (XRD), Scanning Electron Microscope (SEM) and Raman Spectroscopy. The results show that the BT material is crystalline with tetragonal phase and has a one-dimensional morphology with average diameter of 110.6 nm and length of several micrometers.
The viscous composite formed by mixing BT and P(VDF-TrFE) in DMF/Acetone was electrospun into nanofibers and collected as a mat. The amount of BT nanowire in the composite could be as high as 16 vol%. The composite mat was cut into specific shape and size then encapsulated with PDMS after attached the electrodes. The open-circuit Voltage (Voc) of the nanogenerator assembled was evaluated under reciprocated bending. The composite nanogenerator generated more than four times the open-circuit voltage compared to that made from pure P(VDF-TrFE) nanofibers.

關鍵字(中)

★ 鈦酸鋇
★ 靜電紡絲
★ 奈米纖維
★ 複合

關鍵字(英)

★ P(VDF-TrFE)
★ Barium Titanate
★ piezolectric effect

論文目次

中文摘要 I
Abstract II
致謝 III
目錄 IV
圖目錄 VII
表目錄 X
第一章、緒論 1
1-1 研究背景與動機 1
第二章、文獻回顧 2
2-1 壓電效應 2
2-2 靜電紡絲 5
2-2-1 電紡原理 5
2-2-2 溶液參數 6
2-2-3 電紡絲製程參數 7
2-3 製備奈米一維鈦酸鋇 8
2-3-1 電紡絲法 9
2-3-2 陽極氧化法 11
2-3-3 水熱法 12
2-4 奈米纖維 19
2-4-1 純高分子奈米纖維 19
2-4-2 鈦酸鋇/高分子複合奈米纖維膜 21
2-5 實驗目的 23
第三章、實驗步驟與方法 24
3-1 實驗架構 24
3-2 實驗藥品 25
3-3 鈦酸鋇奈米線之合成 26
3-3-1 第一階段水熱法 26
3-3-2 第二階段水熱法 26
3-4 電紡絲溶液配製 27
3-5 靜電紡絲 27
3-6 PDMS封裝 28
3-7 壓電效果測試 29
3-8 分析儀器 30
3-8-1 界達電位分析儀 (Zeta potential) 30
3-8-2 熱重損失儀 (TGA) 30
3-8-3 X-ray 繞射儀 (XRD) 31
3-8-4 傅立葉紅外線光譜儀 (FTIR) 31
3-8-5 拉曼光譜儀 (Raman) 31
3-8-6 掃描式電子顯微鏡 (SEM) 32
3-8-7 穿透式電子顯微鏡 (TEM) 32
第四章、實驗結果與討論 33
4-1 兩段式水熱法合成鈦酸鋇 33
4-1-1 水熱法製備一維鈦酸 (One Dimensional Titanate ) 34
4-1-1-1 水熱溫度與時間之選擇 34
4-1-1-2 一維鈦酸鈉之酸化條件 37
4-1-1-3 一維鈦酸之鑑定 40
4-1-2 鈦酸奈米線水熱轉化成鈦酸鋇奈米線 41
4-1-2-1 以不同水量調配反應溶液 42
4-1-2-2 轉化反應時間之影響 45
4-1-2-3 鈦酸鋇奈米線之鑑定 48
4-2 電紡絲參數對於纖維形貌之影響 52
4-2-1 製程參數對纖維影響 53
4-2-2 溶液參數對纖維影響 55
4-2-3 不同配方對纖維形貌之影響 57
4-3 可撓曲複合壓電膜 61
4-3-1 不同配方對高分子晶相之影響 61
4-3-2 不同配方對壓電效果之影響 64
4-3-3 與文獻之比較 67
第五章、結論與未來展望 68
參考文獻 70

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指導教授

蔣孝澈

審核日期

2018-7-27

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