電滲透流與邊界效應對粒子在電荷可調節管內電泳行為的影響

Influences of Electroosmotic Flow and Boundary on the Electrophoresis of a Particle in a Charge-Regulated Pore

易劍白(Chien-Pai Yee)

指導教授 ： 徐治平

國立臺灣大學/工學院/化學工程學研究所/碩士(2012年)

https://doi.org/10.6342/NTU.2012.02820

摘要

在膠體科學研究領域中，電泳及電滲透皆為非常重要的電動力學現象，故本論文以有限元素法分別研究表面為固定電荷密度或電荷可調解兩種帶電性質之球型膠體粒子在一表面為電荷可調解性質的奈米管道中的電泳行為。同時為了使模擬電動力學現象更貼近真實情況，進而採用溶液相中含有多種離子的系統，相較於典型的雙離子系統是較合的。針對本篇論文膠體粒子泳動行為，則是利用邊界效應、電雙層厚度的變化、粒子及管壁表面電位變化、粒子和管壁之間電雙層的交互影響以及由管壁所產生之電滲透流去著手討論。本論文對於此系統下的電泳現象提出了許多合理的解釋，也可作為實驗學者們在實驗設計、參數規劃及解釋上的參考。

關鍵字

電泳 ； 電荷可調節系統 ； 邊界效應 ； 電滲透 ； 多離子 ； 電雙層交互影響

並列摘要

In the region of the colloid science, electrophoresis and electroosmosis both are very important electrokinetic phenomena. Therefore, the electrophoretic behavior of a sphere colloid surface with constant charge density or charge-regulation in a charge-regulated nano-channel is investigated by finite element method in this research, respectively. To simulate a case closed to the realistic circumstances, adopting the system with multiple ionic species is more suitable than it with typically　binary ionic species in the electrolyte solution. Focusing on the electrophoretic behavior of this study, boundary effect, variation of the thickness of electrical double layer, variation of the electric surface potential of the particle and the channel, the interaction between the electrical double layer of the particle and that of the channel, and electroosmostic flow induced by the charged channel are utilized to discuss. This study provides some reasonable descriptions to explain the electrophoretic phenomena under this case; moreover, specialists in experiment can regard these as references to design experiments, set parameters, and explain special phenomena.

並列關鍵字

Electrophoresis ； charge-regulated system ； boundary effect ； electroosmosis ； multiple ionic species ； double layer interactions

參考文獻

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