電子紙帶電微粒之製備研究

本論文主要針對聚集顆粒進行研究，先合成乳化粒子(粒徑在120nm以下)，結合顏料粒子並藉由調控帶電之表面處理劑組成設計與製程，分別可製備出不同電性之粒子。亦即利用化學凝集將高分子乳液、顏料分散液、凝集劑，在水中藉由pH、攪拌速度和溫度，製得微米級、完好粒形、較細粒徑、較窄分佈的顏料粒子，再利用不同電性之表面處理劑進行微粒表面改質，可以製得不同電性粒子。若使用不同顏色顏料，如Y(Yellow)、M(Magenta)、C(Cyan)、K(Black)，則可製得四種顏色的帶電粒子。高分子乳液合成研究，主要利用苯乙烯Styrene單體及壓克力單體，如n-Butyl acrylate、Acrylic acid等，結合界面活性劑組成設計在水中進行乳化聚合，可成功控制其粒徑在120 nm以下，另外將四色顏料(Y、M、C、K)，添加分散劑，分別分散在水中，亦控制其粒徑在120nm以下。由於利用不同電性表面處理劑，可以改變帶電粒子的電性，因此本研究使用不同表面處理劑(Sodium lauryl sulfate與 Dodecyl trimethyl ammonium chloride)分別使粒子帶負電與正電，於進行聚集融合完成後的的微米粒子，針對所需之電性添加，藉由攪拌速度和溫度，使微米粒子表面帶電。將其分散在非極性溶液中，以表面電位儀可測得不同電性粒子的表面電位，製備出不同電性的微米帶電粒子。此材料預計可應用於電子紙或電子閱讀器等產品之顯示用特殊材料。

關鍵字

聚集；粒子；電子紙

並列摘要

The thesis mainly focuses on the study for preparation of charged particles. Firstly, emulsified particles, whose diameters are less than 100 nm, have been synthesized. Then we have blended the emulsified particles with pigments and coagulant agents to obtain charged particles. With the chemical agglutination, polymer emulsifiers, pigment dispersing agents, and coagulant agents are mixed in the water by the modulation of pH value, stirring speed, and temperature to produce color particles with micro-sizes, intact grains, less diameters, and narrower distribution. In this study, we have prepared charged particles with four colors by the utilization of yellow (Y), magenta (M), Cyan (C), and black (K) pigments. The syntheses of polymer emulsifiers are executed by the emulsifying polymerization of styrene monomer and acrylic monomers such as, n-butyl acrylate, and acrylic acid, etc. in the water with the prescription of emulsifying agents, successfully manipulating the diameters of polymer emulsifiers, which are less than 120 nm. Moreover, the pigments with four colors (i.e. Y, M, C, and K) have also been blended with dispersing agents and are dispersible in the water. All the diameters of Y, M, C, and K are less than 120 nm when dispersed in the water. In this study, we have manipulated the charges of particles with different charging agents (i.e. sodium lauryl sulfate and dodecyl trimethyl ammonium chloride). The former is a negative charging agent and the latter is a positive one. During the aggregating fusion, the polymer emulsifiers are adsorbed with appropriate pigments by the modulation of pH value, stirring speed, and temperature, consequently generating micro-sized particles, and then, charging agents are added to modify the charges of these particles. After dispersed them in the nonpolar solvents, micro-sized particles with distinct charges are prepared and their surface potentials can be measured with a Zeta Potential. These materials will be applied for displays such as e-paper, e-reader and so on.

並列關鍵字

aggregate ； particle ； e-paper

參考文獻

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