基於慣性聚焦之微粒分析技術

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姓名

張峻瑞(Chun-Jui Chang) 查詢紙本館藏

畢業系所

光機電工程研究所

論文名稱

基於慣性聚焦之微粒分析技術

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摘要(中)

本研究針對塑膠微粒設計一矩形橫截面之螺旋流道，透過流體的慣性聚焦使不同尺寸的粒子在螺旋型流道中分離。由於粒子在流道中的聚焦位置與其大小有關，本實驗也對慣性聚焦原理進行深入的探討與計算。此外，本流道設計在出口部分額外增加 PZT 壓電材料，利用聲波所產生的聲輻射力作用在粒子上，提高分離的效率及分離尺寸範圍。最後，本實驗以電容式量測對分離後的粒子溶液進行分析，發現溶液中粒子濃度越高，電容值的變化量越大。

摘要(英)

This study designs a spiral flow channel with a rectangular cross-section for plastic particles. Particles are separated in the spiral flow channel through the inertial focusing of the fluid. Since the focusing position of the particles in the flow channel is related to its size, the principle of inertial focusing is also discussed and calculated in this experiment. In addition, at outlet part of the flow channel, we install piezoelectric material. Using the acoustic radiation force generated by the acoustic wave that acting on the particles to improve the separation efficiency and the separation size range. Finally, in this experiment, the separated particle solution was analyzed by capacitive measurement. It was found that the higher the particle concentration in the solution, the greater change in capacitance value.

關鍵字(中)

★ 慣性聚焦
★ 粒子分離
★ 聲波

關鍵字(英)

★ Inertial focusing
★ Particle separation
★ Acoustic wave

論文目次

目錄
摘要........................................................................................................................i
ABSTRACT..........................................................................................................ii
目錄......................................................................................................................iii
圖目錄................................................................................................................... v
表目錄................................................................................................................viii
第一章緒論......................................................................................................... 1
1.1 前言........................................................................................................ 1
1.2 研究動機................................................................................................ 1
1.3 文獻回顧................................................................................................ 2
第二章基礎理論................................................................................................. 7
2.1 慣性聚焦原理........................................................................................ 7
2.2 駐波理論.............................................................................................. 14
2.3 聲幅射力.............................................................................................. 15
2.4 電容感測器原理.................................................................................. 17
2.4.1 介電常數................................................................................... 18
2.5 等效介質理論...................................................................................... 19
第三章實驗設計............................................................................................... 21
3.1 實驗方法.............................................................................................. 21
3.2 實驗設備與材料.................................................................................. 23
3.3 流道元件製作...................................................................................... 26
3.4 電容感測器設計.................................................................................. 27
3.5 實驗模擬與設計.................................................................................. 29
3.5.1 模擬環境設定........................................................................... 29
3.5.2 流道速度分布模擬................................................................... 30
第四章實驗結果與討論................................................................................... 34
4.1 實驗流程.............................................................................................. 34
4.2 實驗結果.............................................................................................. 36
4.2.1 粒子流動軌跡........................................................................... 36
4.2.2 電容值量測結果....................................................................... 38
4.3 實驗討論彙整...................................................................................... 46
4.3.1 慣性聚焦理論計算與討論....................................................... 46
4.3.2 外加聲泳之流動軌跡討論....................................................... 50
4.3.3 等效介質理論計算................................................................... 52
第五章結論....................................................................................................... 54
參考文獻............................................................................................................. 55

參考文獻

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指導教授

陳世叡(Shih-Jui Chen)

審核日期

2022-9-27

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