表面電漿共振感測技術應用於介電質混合研究及乳化程度量測

Studies of Dielectric Mixing and Emulsifiability Measurement by Using the Surface Plasmon Resonance Sensing Technique

王巍樺(Wei-Hua Wang)

指導教授 ： 閔庭輝

共同指導教授 ： 劉育松(Yu-Sung Liu)

國立虎尾科技大學/電機資訊學院/光電與材料科技研究所在職專班/碩士(2010年)

https://doi.org/10.6827/NFU.2010.00005

摘要

本研究利用表面電漿共振感測技術來進行介電質混合之研究，並將此技術應用於乳液之乳化程度的量測，研究工作將分成以下幾個重點方向進行：(1)調配不同體積百分率(Volume Fraction)的可溶性溶液，並用表面電漿共振感測技術來對其等效介電常數進行量測，再利用可溶性物質混合之等效介電常數理論及光子與電漿子耦合之動量守恆理論來計算其等效介電常數，並與實驗結果做比較，實驗結果與理論計算具有高度的一致性，顯示我們表面電漿共振自動化感測技術與資料擷取的系統是可以達到高度精確的介電常數之量測。(2)利用不同的攪拌時間來調配相同油、水比例但不同油滴顆粒大小（不同乳化程度）之不溶性的溶液（乳液）。令我們感到驚訝地，成分之體積百分率皆相同（成分比例相同）的乳液，在實驗結果當中，其等效介電常數竟然會隨著油滴顆粒變小而上升，這跟(1)裡面的可溶性物質混合之等效介電常數理論是不相同的，我們可以利用表面電漿共振感測技術所測得之精確的等效介電常數來進行乳化程度之量測。實驗結果與加入修正因子之類晶體接近-同調位能(QCA-CP)理論模型之模擬計算來做比較，兩者具有良好之一致性。(3)最後，關於置於高溫環境的時間長短對乳液的穩定性之研究，在我們的實驗當中發現，乳化程度較好的乳液，對於長時間置於高溫而言，具有較高的穩定性。

關鍵字

表面電漿共振 ； 乳化 ； 等效介電常數

並列摘要

In this research, we present the studies of dielectric mixing and emulsifiability measurement by using the surface plasmon resonance (SPR) sensing technique. The research will be divided into the following key directions: (1) Prepare dissolvable solutions of different volume fractions. Compare the effective permittivities of these solutions measured by the SPR sensing technique with those calculated from the effective medium theory for dissolvable matters and the momentum conservation of the photon-plasmon coupling. The precise agreement between the experimental and theoretical results ensures the highly accurate permittivity is achievable via our SPR automatic control and data acquisition system. (2) Prepare indissoluble solutions (emulsions) blended into the same oil-water volume fraction but with different oil droplet sizes (different emulsifiability) caused by different stirring time. To our surprise, the experimental results show that even in the same volume fraction, the emulsion with a decreasing size of oil droplets can exhibit a higher value of effective permittivity. This is contrast to the effective medium theory of dissolvable matters seen in (1). The emulsifiability is then possibly determined by the precise effective permittivity obtained from the SPR sensing technique. The experimental results are compared with a quasicrystalline approximation coherent potential (QCA-CP) theoretical model with a particle size correction factor. There is a good agreement between the experimental and theoretical results. (3) Finally, the temporal stability of the emulsion is verified at high temperature. To our expectation, the emulsion with a better emulsibility reveals a better temporal stability at high temperature.

並列關鍵字

SPR ； Emulsifiability Measurement ； Effective Permittivity

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