利用可見光及紫外光硬化膠植入電雙極分子改變硬化膠光電特性之研究

Manipulating the resin’s photoelectrical property by using VIS/UV photocuring and electrical dipole

劉信宏(Hsin-Hung Liu)

指導教授 ： 廖重賓

共同指導教授 ： 郭文凱(Wen-Kai Kuo)

國立虎尾科技大學/電機資訊學院/光電與材料科技研究所/碩士(2010年)

摘要

傳統而言，材料的光學特性 (布魯斯特角、光線對稱性) 在光波頻率下是不變的。本研究之目的係指出利用微觀控制電雙極的方式，即電雙極工程（dipole engineering），可以用不須介入原材料製程的方式達到改變該材料之光學特性的目的。研究中利用光硬化(light curing)材料如UV膠亦或是可見光硬化膠以及具強極性之材料(本研究使用高分子駐極體材料：聚偏氟乙烯poly vinyli dene fluoride ,PVDF ,(-CH2-CH2-)n)，以電極化方式決定電雙極方向後，利用可見光硬化膠製成元件。以此，微觀控制電雙極方向後可改變材料光學特性。此處特別探討的是材料布魯斯特角之改變與材料光學散射的非對稱性。
實驗中所使用的宿主材料（host material）為UV膠搭配增感劑（sensitizer）成為可見光硬化材料，其原本之布魯斯特角經測量為53度，經由電雙極工程之改造，明顯的改變了布魯斯特角至43度。
傳統材料的光學散射性具有一定的對稱性，表示在一均勻的表面上，入射光與法線之入射角X∘與-X∘其反射率或是穿透率是一樣的。實驗中亦發現利用微觀控制電雙極的方式可實現改變光學散射之對稱性（達30%），即造成非對稱性散射光學之元件。
此研究計畫係在虎科大光電同調控制實驗室與奧博實驗室之全力支援下進行。

關鍵字

電雙極 ； UV膠 ； 聚偏二氟乙烯

並列摘要

Traditionally, some basic optical properties of a material, such as the Brewster angle, are fixed regardless of the color (i.e., frequency) of an incident light. This current research aims to show that the Brewster angle can be varied and a corollary asymmetric scattering phenomenon will be evidenced, as predicted by the theory. It is accomplished through employing a microscopic method called “dipole engineering” on a host material in a post-process manner.
In experiments, a UV/Vis resin (adhesive glue) for light-curing was adopted as the host wherein extra anisotropic, optically responsive permanent dipoles were added to become polymeric electrets (poly vinyli dene fluoride, PVDF, (-CH2-CH2-)n). Then, the embedded electric dipoles were further oriented via predetermined external electric fields. It was revealed that a new Brewster angle emerged, which was about 10° away from the original one. Additionally, at this volumetrically-engineered new material surface, asymmetric scattering of lights incident at conjugate angles was evidenced experimentally.

並列關鍵字

dipole ； UV photocuring ； PVDF

參考文獻

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