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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/84712完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 李世光(Chih-Kung Lee) | |
| dc.contributor.author | Wen-Kai Liu | en |
| dc.contributor.author | 劉文凱 | zh_TW |
| dc.date.accessioned | 2023-03-19T22:21:48Z | - |
| dc.date.copyright | 2022-09-12 | |
| dc.date.issued | 2022 | |
| dc.date.submitted | 2022-09-07 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/84712 | - |
| dc.description.abstract | 本研究以開發多孔壓電駐極體薄膜製程為核心，選用兩種PVDF的共聚物PVDF-TrFE、PVDF-HFP為材料，採用非溶劑誘導相轉變(Nonsolvent Induced Phase Separation, NIPS)以及蒸氣誘導相轉變(Vapor-Induced Phase Separation, VIPS)方式製作具有海綿狀孔洞的薄膜。研究發現NIPS製程使用之非溶劑凝聚液與薄膜成形具有關聯性，並可透過添加物改變薄膜結構；以VIPS製程製作薄膜則發現溶劑為薄膜結構的重要變因，透過不同溶劑以及不同比例的混和溶劑的選擇可產生不同結構的薄膜。在完成多孔壓電駐極體薄膜製程開發後，亦將各種薄膜進行-16 kV及12小時的電暈極化駐電程序，並量測其壓電係數。以動態法量測壓電係數之結果顯示，以NIPS法製備高分子溶液中含有8 wt%乙醇並使用60 wt%乙醇為凝聚液所製成的薄膜、以VIPS法製備分別使用DMF、DMAC溶劑製成的薄膜，輸出響應媲美商用EMFi薄膜；準靜態法量測結果則發現NIPS法製備高分子溶液中含有2 wt%乙醇並使用60 wt%乙醇為凝聚液所製成的薄膜，於0.1 N的施力條件下輸出超過4000 pC/N，相較商用EMFi薄膜高出9.95倍，其餘樣本也皆具有約2000 pC/N以上的輸出效果，遠高於EMFi以及實心的PVDF薄膜，量測結果也顯示準靜態法電荷輸出與樣本電容大小具有相依性。從本研究可發現，無論是NIPS、VIPS皆可透過參數調控改變薄膜結構，並使其在低頻率範圍的量測具有良好的壓電輸出響應。 | zh_TW |
| dc.description.abstract | In this study, different processes to fabricate porous piezoelectric electret films are developed, including non-solvent-induced phase separation (NIPS) and vapor-phase induced phase separation (VIPS) methods. PVDF-TrFE and PVDF-HFP copolymers are used to create spongy structures with different pore sizes and geometry. It is found that the non-solvent-based NIPS process is a key factor in the formation of the porous film, and the film structure can be modulated by additives. On the other hand, it is also found that the solvent is an important factor in the porous film formation of the VIPS process. After poling these porous piezoelectric electret films prepared by different methods and parameters, a corona discharge polarization at -16 kV and 12 hours of treatment is conducted, and their piezoelectric coefficients are measured and compared. Using the dynamic method, it shows that the NIPS films prepared with 8 wt% ethanol in the polymer solution and 60 wt% ethanol as the coagulation solution can have a compatible piezoelectric constant with the commercial EMFi electret film. The VIPS films prepared by DMF or DMAC solvents also is comparable to the EMFi electret film. The quasi-static method shows that the piezoelectric coefficient of the NIPS film prepared by 2 wt% ethanol in the polymer solution and 60 wt% ethanol as the coagulation solution can exceed 4000 pC/N, which is about 9.95 times higher than that of EMFi films. In summary, it is found that both NIPS and VIPS can create a porous piezoelectric film with different porous structures and they can provide an excellent piezoelectric property for sensing applications. | en |
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| dc.description.tableofcontents | 口試委員會審定書 i 誌謝 ii 中文摘要 iii ABSTRACT iv 目錄 v 圖目錄 viii 表目錄 xiii 第1章 緒論 1 1.1 前言 1 1.2 研究背景 1 1.3 研究動機與目標 2 1.4 論文架構 3 第2章 鐵電材料性質、駐極體介紹 5 2.1 鐵電材料特性 5 2.1.1 壓電材料的研究發展 6 2.1.2 壓電效應、鐵電效應、熱電效應 7 2.1.3 常見的壓電材料 12 2.2 駐極體的發展與材料分類 13 2.2.1 駐極體的發展史 13 2.2.2 電荷駐極體材料介紹 15 2.2.3 偶極駐極體材料分類 17 2.3 駐極體的製程與原理特性 19 2.3.1 駐極體的極化方式及程序 19 2.3.2 駐極體的物理等效模型 25 2.3.3 常見的駐極體材料及製程 29 2.4 鐵電聚合物 31 2.4.1 PVDF的結晶相 32 2.4.2 提升PVDF β結晶相的方法 33 2.5 壓電係數的量測方式 35 2.5.1 透過正壓電效應量測壓電係數的方法 35 2.5.2 透過逆壓電效應量測壓電係數的方法 38 2.5.3 共振法計算壓電係數 39 第3章 相轉變法薄膜製程原理 42 3.1 相分離熱力學相圖 43 3.2 熱誘導式相分離法 44 3.3 蒸發誘導相分離法 45 3.4 非溶劑誘導相分離法 45 3.5 蒸氣誘導式相分離 46 3.6 聚偏二氟乙烯相分離製程 46 3.6.1 NIPS製作PVDF薄膜 46 第4章 研究方法與實驗架設 51 4.1 NIPS製備高分子薄膜 51 4.1.1 非溶劑乙醇濃度與成膜的關係 52 4.1.2 添加物、凝聚槽非溶劑濃度與成膜的關係 54 4.2 VIPS製備高分子薄膜 56 4.2.1 溶劑的種類與成膜的關係 56 4.2.2 混和溶劑與成膜的關係 58 4.3 薄膜極化製程及樣本製備 59 4.3.1 駐電程序 59 4.3.2 駐極體薄膜實驗樣本製備 60 4.4 壓電係數量測設備架設 62 4.4.1 動態法實驗架設 62 4.4.2 準靜態法實驗架設 63 第5章 實驗結果與討論 66 5.1 薄膜橫截面與參數調控的關係 66 5.1.1 NIPS之非溶劑乙醇濃度與成膜的關係 66 5.1.2 NIPS之添加物、凝聚槽非溶劑濃度與成膜的關係 70 5.1.3 VIPS之溶劑的種類與成膜的關係 75 5.1.4 VIPS混和溶劑與成膜的關係 77 5.2 壓電係數量測結果 80 5.2.1 動態法量測結果 80 5.2.2 準靜態法量測結果 90 5.3 薄膜結構與電性討論 98 5.3.1 樣本電容量測結果 98 第6章 結論及未來展望 105 6.1 結論 105 6.2 未來展望 106 參考文獻 107 | |
| dc.language.iso | zh-TW | |
| dc.subject | 動態法 | zh_TW |
| dc.subject | 壓電駐極體薄膜 | zh_TW |
| dc.subject | 非溶劑誘導相轉變 | zh_TW |
| dc.subject | 蒸氣誘導相轉變 | zh_TW |
| dc.subject | 準靜態法 | zh_TW |
| dc.subject | Vapor-induced phase separation | en |
| dc.subject | Piezoelectric electret film | en |
| dc.subject | Quasi-static method | en |
| dc.subject | Dynamic method | en |
| dc.subject | Non-solvent-induced phase separation | en |
| dc.title | 以相轉變法製作多孔壓電駐極體薄膜之製程及特性分析 | zh_TW |
| dc.title | Development and Analysis of a Porous Piezo-Electret Film Fabricated by Phase Inversion Method | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 110-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.coadvisor | 許聿翔(Yu-Hsiang Hsu) | |
| dc.contributor.oralexamcommittee | 宋家驥(Chia-Chi SUNG),王昭男(Chao-Nan Wang),柯文清(Wen-Ching Ko) | |
| dc.subject.keyword | 壓電駐極體薄膜,非溶劑誘導相轉變,蒸氣誘導相轉變,動態法,準靜態法, | zh_TW |
| dc.subject.keyword | Piezoelectric electret film,Non-solvent-induced phase separation,Vapor-induced phase separation,Dynamic method,Quasi-static method, | en |
| dc.relation.page | 114 | |
| dc.identifier.doi | 10.6342/NTU202203215 | |
| dc.rights.note | 同意授權(限校園內公開) | |
| dc.date.accepted | 2022-09-07 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 工程科學及海洋工程學研究所 | zh_TW |
| dc.date.embargo-lift | 2024-09-07 | - |
| 顯示於系所單位： | 工程科學及海洋工程學系 | |
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