臺灣博碩士論文加值系統

P(VDF-TrFE)聚(偏氟乙烯-三氟乙烯)已是一種廣為人知的具壓電性的電活性聚合物(EAP)，具有較高的結晶度。若加入第三單體CTFE形成P(VDF-TrFE-CTFE)聚(偏二氟乙烯-三氟乙烯-氯代三氟乙烯)會將鐵電晶體破壞成奈米極性區的弛豫鐵電微晶，並顯示出較高的介電常數。本研究利用同軸靜電紡絲，將P(VDF-TrFE)和P(VDF-TrFE-CTFE)混成在一起，並利用同步輻射Wide-angle X-ray Diffraction (WAXD)實驗研究其材料微結構、晶格結構等對機械及壓電性質的影響。結果發現利用同軸電紡製程的奈米纖維由於其與生物肌肉相近的楊氏模量，有很大的潛力可以應用於人造肌肉。並且當P(VDF-TrFE)作為奈米纖維的核心材料，P(VDF-TrFE-CTFE)作為奈米纖維的殼材料時，由於三元聚合物的加入及結晶度的上升，壓電常數d33高達50.5pm/V，因此作為人造肌肉致動器有很大的驅動應變能力。

P(VDF-TrFE) poly(vinylidene fluoride-trifluoroethylene) is a well-known piezoelectric electroactive polymer (EAP) with high crystallinity. If the third monomer (CTFE) is introduced to form P(VDF-TrFE-CTFE) poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene), the ferroelectric domains will be fragmented into a relaxor ferroelectric domains which is nano polar region with high dielectric constant. In this study, we fabricated core-shell electrospun nanofibers by using coaxial electrospinning of P(VDF-TrFE) and P(VDF-TrFE-CTFE). We conducted wide angle x-ray diffraction (WAXD) to study the impact of lattice structure and crystallinity on the mechanical and piezoelectric properties. The coaxial electrospun nanofibers possess comparable Young’s modulus with that of the mammalian muscles. The core/shell-TrFE/CTFE has higher piezoelectric coefficient (d33) of 50.5 pm/V, ascribed to the addition of terpolymer and the increase of crystallinity, suggesting a potentially promising candidate for artificial muscle actuator strain.

中文摘要 i
Abstract ii
誌 謝 iii
目 錄 iv
圖目錄 vi
表目錄 ix
一、 前言 1
二、 文獻回顧 2
2.1 電活性聚合物(Electroactive Polymer, EAP)之發展 2
2.2 電活性聚合物(Electroactive Polymer, EAP)分類 3
2.3 壓電效應 5
2.4 電活性聚合物(Electroactive Polymer, EPA)之性能 7
2.4.1 材料之介電常數介紹 7
2.4.2 EAP之機械性質 9
2.5 PVDF共聚物介紹 10
2.6 靜電紡絲製程介紹 12
2.6.1 靜電紡絲製程參數 13
2.6.2 同軸靜電紡絲介紹 16
2.6.3 同軸靜電紡絲製程參數 17
2.7 同步輻射X光散射實驗 18
2.7.1 同步輻射光源特性及優勢 21
2.7.2 廣角繞射介紹(Wide Angle X-ray Diffraction, WAXD) 21
三、 實驗 22
3.1 實驗目的 22
3.2 實驗材料 23
3.3 實驗樣品製備 23
3.4 纖維形貌觀察 26
3.4.1 掃描式電子顯微鏡(Scanning Electron Microscope, SEM) 26
3.5 微結構觀察 27
3.5.1 廣角 X 射線繞射儀(Wide Angle X-ray Diffraction, WAXD) 27
3.5.2 廣角軟體積分 28
3.5.3 重合峰值擬合分析 31
3.5.4 傅立葉轉換紅外線光譜儀(Fourier Transform InfraRed Spectroscopy, FTIR) 32
3.6 拉伸試驗 32
3.7 電性量測 34
四、 實驗結果 35
4.1 表面微觀結構觀察 35
4.2 傅立葉轉換紅外線光譜(FTIR)分析 38
4.3 X光繞射圖理論計算 40
4.4 廣角X光繞射(WAXD)繞射峰分析 42
4.4.1 繞射位置(2 theta position)分析 44
4.4.2 峰值強度(Intensity)分析 45
4.4.3 繞射峰半高寬(FWHM)分析 46
4.5 拉伸測試結果 47
4.6 低電場下介電性能 51
4.7 高電場下壓電性質 53
五、 結果與討論 54
5.1 電紡製程之纖維異向性 54
5.2 同軸電紡晶體結構之改變 57
5.3 同軸電紡機械性質優化 58
5.4 同軸電紡電性之改變 61
六、 結論 63
七、 建議未來工作 64
八、 參考文獻 66
九、 附錄 72
9.1 同軸電紡製程 72
9.2 GASAII軟體操作 73
9.3 Fityk軟體操作 74
9.4 簡歷 76
9.5 參加年會海報 77
9.6 年會得獎獎狀 80

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