本實驗採用微質點影像測速儀（MPIV），成功量得在PDMS微渠道內螢光質點分別在1x TAE、1x TBE、10mM NaCl、10mM Borate電解液中的電泳速度，再以電滲驅動的方式，針對200 µm x 200 µm x 40 mm的方形微渠道，分別將電場強度從2.5到25 kV/m，進行全域流場的速度量測。經由量測後之分析，得到電場強度與電滲速度之線性和非線性的關係，透過線性電滲速度可求得四種電解液各自的電滲移動率，並將此結果與先前之文獻相互比較，而非線性電滲速度主要是由於焦耳熱效應所造成，在此也透過溫度模擬的方式將所得之結果與實驗結果做比較。最後，定義出影響電滲流動的參數，並把這些參數關聯為一方程式，而此關聯式之誤差在1%以內。

Experiments were performed using a microparticle image velocimetry (MPIV) for full field velocity distributions of electroosmotically driven flows in a 40 mm long microchannel with a square cross section of 200 µm × 200 µm. Electroosmotic flow bulk fluid velocity measurements were made in a range of streamwise electric field strengths from 5 to 25 kV/m. A series of seed particle calibration tests can be made in a 200 µm x 200 µm x 24000 µm untreated PDMS channel incorporating MPIV to determine the electrophoretic mobilities in aqueous buffer solutions of 1 TAE, 1 TBE, 10 mM NaCl, and 10 mM borate, respectively. A linear/nonlinear (due to Joule heating) flow rate increase with applied field was obtained and compared with those of previous studies. A parametric study, with extensive measurements was performed with different electric field strength and buffer solution concentration under a constant zeta potential at wall for each buffer. The characteristics of electroosmotic flow in square microchannels were thus investigated. Finally, a composite correlation of the relevant parameters was developed within accuracy for 99% of the experimental data.

目錄............................................................................................................ i
表目錄...................................................................................................... iv
圖目錄....................................................................................................... v
符號說明................................................................................................ viii
中文摘要................................................................................................... x
英文摘要.................................................................................................. xi


第一章 緒論......................................................................................... 1
1-1 前言.......................................................................................... 1
1-2 微流體概論.............................................................................. 2
1-3 液體微觀流動.......................................................................... 3
1-4 電雙層的形成.......................................................................... 6
1-5 電滲流動機制.......................................................................... 7
1-6 電湧分離機制.......................................................................... 8
1-7 研究背景與目的.................................................................... 10
1-8 文獻回顧................................................................................ 11

第二章 理論分析............................................................................... 17
2-1 電雙層之電位分布................................................................ 17
2-2 電雙層之動量方程式............................................................ 20
2-3 參數分析................................................................................ 23

第三章 實驗設備系統....................................................................... 25
3-1 Micro-PIV系統...................................................................... 25
3-2 製程設備................................................................................ 26
3-3 量測周邊設備........................................................................ 29

第四章 實驗方法及步驟................................................................... 41
4-1 微渠道製程............................................................................ 41
4-1-1 微渠道製作.................................................................... 41
4-1-2 電極製作........................................................................ 43
4-1-3 微渠道封裝.................................................................... 43
4-2 藥品配製................................................................................ 44
4-3 流動環路................................................................................ 44
4-4 MPIV量測系統建立............................................................. 45
4-5 分析方法................................................................................ 46
4-6 實驗範圍................................................................................ 47

第五章 誤差分析............................................................................... 56

第六章 結果與討論........................................................................... 60
6-1 流場觀測................................................................................ 60
6-2 速度向量和流線.................................................................... 60
6-3 速度曲線................................................................................ 61
6-4 速度分析................................................................................ 62
6-5 關係式建立............................................................................ 65

第七章 結論與建議........................................................................... 84
7-1 結論........................................................................................ 84
7-2 建議與改進............................................................................ 85

參考文獻................................................................................................. 87
附錄A...................................................................................................... 93
附錄B...................................................................................................... 98

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