請用此 Handle URI 來引用此文件：
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/59226完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 李克強(Eric Lee) | |
| dc.contributor.author | Fang-Yi Liao | en |
| dc.contributor.author | 廖芳儀 | zh_TW |
| dc.date.accessioned | 2021-06-16T09:18:15Z | - |
| dc.date.available | 2017-07-20 | |
| dc.date.copyright | 2017-07-20 | |
| dc.date.issued | 2017 | |
| dc.date.submitted | 2017-07-10 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/59226 | - |
| dc.description.abstract | 本論文探討液滴垂直於氣液交界面或一固體平面的電泳運動現象，並檢視極化效應、邊界效應對粒子泳動行為造成的影響。本研究發現當粒子距邊界近時，邊界的存在對粒子運動造成阻力，並且削弱極化效應對粒子泳動度的影響。同時觀察出當電雙層越厚以及粒子離邊界越近時，邊界給予粒子的阻力越大，使得粒子泳動度下降的幅度越明顯。同時亦觀察出，當粒子表面電位高(ζa*≧3)時，邊界的存在會削弱極化效應的影響。因此粒子距邊界近時，雖然邊界給予粒子的阻力變大，但極化效應的影響減弱，使得粒子距邊界近時，泳動度下降幅度會較不顯著。本研究以擾動離子分布圖、流場圖、以及平衡電位場圖觀察邊界效應造成粒子電雙層變形的現象。
另一方面，當液滴內外黏度比愈小，液滴所受的流體阻力越小，其電泳速度隨之增加，反之當內外黏度比越大的時候，所受的流體阻力越大，其電泳速度越接近硬球粒子的結果。此外，本研究提供了修正因子表格解釋邊界效應以及表面電位對粒子泳動度造成的影響，以提供學者預測液滴電泳受邊界效應的影響。 | zh_TW |
| dc.description.abstract | Electrophoretic motion of a charged liquid droplet or a bubble normal to an air-water interface is investigated theoretically in this study, motivated by the rapid development of various practical applications involving micro/nano emulsions, as well as the fascinating potentials of using the air-water interface as a platform for the two-dimensional colloidal crystallization, for instance.
The presence of an air-water interface is found to reduce the droplet/bubble mobility in general, especially when the double layer is thick or the particle is close to the interface. Special attention is given to the boundary effect upon the convection-induced motion-deterring double layer polarization effect pertinent to highly charged colloids. As demonstrated by various contour plots of both electric and flow fields, the presence of an air-water interface affects the particle motion mainly through the deformation of the double layer when it touches the interface. A counterclockwise vortex flow around the droplet/bubble is observed which pumps up the counterions originally in the wake to the front region. This significantly alleviates the motion-deterring polarization effect when the thickness of double layer is comparable to the droplet/bubble radius. The release of this brake (polarization effect) refuels the electric driving force of the droplet/bubble hence affects its motion near the interface as observed. Convenient charts of correction factors for the boundary effect, expressed as a function of separation distance, are provided to facilitate the possible usage by interested researchers and engineers. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-16T09:18:15Z (GMT). No. of bitstreams: 1 ntu-106-R03524007-1.pdf: 4254956 bytes, checksum: 720917772e9c5443a2a583acc9cee339 (MD5) Previous issue date: 2017 | en |
| dc.description.tableofcontents | 目錄
摘要 I Abstract II 目錄 IV 圖目錄 VII 表目錄 XII 第1章序論 1 1.1.1微乳液系統介紹 1 1.1.2微乳液之應用 2 1.1.3微乳液界面與膠體科學 2 1.1.4 不具界面活性劑的液滴系統 7 1.1.5 浮力所造成之速度 12 1.1.6微胞(micelle)與微乳液(microemulsion) 14 1.1.7電雙層理論 16 1.1.8電解質溶液中的電泳 17 1.1.9液滴電泳文獻回顧 20 1.2.1施加垂直氣液交界面電場之相關實驗 22 1.2.2氣液交界面相關應用 24 1.3.1研究目的與論文架構 28 第2章理論分析 29 2.1.1系統描述 29 2.1.2主控方程式 31 2.1.3平衡態與擾動態 35 2.2.1系統參數無因次化 39 2.2.2主控方程式無因次化 42 2.3.1粒子受力計算 46 2.4計算流程 50 第3章數值方法 52 3.1正交配位法 53 3.2空間映射 58 3.3兩區聯解問題 59 3.4牛頓-拉福生迭代法 61 3.5數值積分 64 第4章液滴垂直氣液交界面之電泳現象 66 4.1系統描述 66 4.1.2無因次化邊界條件 68 4.2斂性測試與文獻比對 70 4.3表面電位與離子強度的影響 75 4.4邊界存在的影響 84 4.5液滴黏度比之影響 90 4.6以修正因子探討粒子表面電位與邊界效應的影響 94 4.7結論 101 第5章液滴垂直於固體邊界之電泳現象 102 5.1系統描述 102 5.1.2無因次化邊界條件 102 5.2收斂性測試 105 5.3粒子對固體平面與對自由液面電泳現象之比較 107 5.4表面電位與離子強度的影響 112 5.5液滴黏度比的影響 117 5.6結論 120 參考文獻 .121 附錄A …………………………………………….………………132 附錄B.……………………………………….……………………138 附錄C ………………………………………….………………... 140 | |
| dc.language.iso | zh-TW | |
| dc.subject | 邊界效應 | zh_TW |
| dc.subject | 液滴 | zh_TW |
| dc.subject | 電泳現象 | zh_TW |
| dc.subject | 氣液交界面 | zh_TW |
| dc.subject | 固體平面 | zh_TW |
| dc.subject | 極化效應 | zh_TW |
| dc.subject | Boundary Effect | en |
| dc.subject | Double Layer Polarization | en |
| dc.subject | Droplet | en |
| dc.subject | Electrophoresis | en |
| dc.subject | Air-Water Interface | en |
| dc.subject | Bubble | en |
| dc.title | 垂直於氣液交界面及固體平面之液滴電泳現象 | zh_TW |
| dc.title | Electrophoresis Behavior of a Liquid Droplet Normal to an Air-Water Interface or a Solid Plane | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 105-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 游佳欣(Jiashing Yu),陳賢燁(Hsien-Yeh Chen) | |
| dc.subject.keyword | 液滴,電泳現象,氣液交界面,固體平面,極化效應,邊界效應, | zh_TW |
| dc.subject.keyword | Electrophoresis,Droplet,Bubble,Air-Water Interface,Double Layer Polarization,Boundary Effect, | en |
| dc.relation.page | 143 | |
| dc.identifier.doi | 10.6342/NTU201700749 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2017-07-10 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 化學工程學研究所 | zh_TW |
| 顯示於系所單位： | 化學工程學系 | |
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