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  • 學位論文

以金屬有機骨架與高分子混合材料改善劣化液晶之電性

Improved Electrical Properties of a Degraded Liquid Crystal by Metal–Organic-Framework/Polymer Mixtures

指導教授 : 李偉 徐芝珊

摘要


本論文旨在探討以金屬有機骨架(MOF)與高分子材料混合,利用MOF材料中的孔洞,吸附回收液晶中的離子雜質進行純化。藉由與高分子混合後,增進其粒徑大小,以利過濾流程。並在高分子與MOF混合物中添加AMPS材料對液晶中的離子雜質進行吸附。藉由介電頻譜量測技術,觀察離子電荷所產生的電極極化影響;並配合電壓保持率的量測,進而探討添加AMPS增進純化液晶的效果,以利顯示元件之應用。 研究結果顯示,高分子聚合物自身並無增進MOF材料吸附效果的能力。但在高分子與MOF材料混合物中添加AMPS後,純化效果可以明顯的提升,由介電頻譜術及電壓保持率等方法可以確實量測到純化的效果。本論文揭示在高分子與MOF材料混合物中添加AMPS,於有助於減少液晶中的離子雜質,可用於回復劣化液晶,使得純化後液晶得以再次利用。

關鍵字

液晶 高分子 金屬有機骨架

並列摘要


This thesis focuses on improving the electrical properties of degraded liquid crystals (LCs) by Metal–Organic-Framework (MOF) / polymer mixtures. Since the ionic impurities in the degraded LCs can be absorbed by the holes of MOF material, the LCs are purified after the MOF material is removed. To make the filter processes easier, the grain sizes of MOF material are increased by mixing MOF with polymer. Finally, we investigate the effects of doping AMPS (2-acrylamido-2-methylpropane sulfonic acid) in the MOF/polymer mixtures. The research result shows that the polymer is not a good absorber, and using polymer alone cannot improve the absorbing ability of MOF material. However, doping AMPS in the MOF/polymer enhances the ionic purification obviously via the measurement of the dielectric spectroscopy and voltage holding ratio (VHR). The electric properties of the purified LCs are very close to that of the original LCs. Therefore, the MOF/polymer-AMPS can be used to recover the degraded LCs and make them to be used again.

參考文獻


[30] 劉軒宏,《摻雜不同維度奈米粒子液晶之時變介電特性》,碩士論文,中原大學物理研究所,民98年7月。
[31] 簡伯儒,《液晶摻雜奈米碳管之介電研究》,碩士論文,中原大學物理研究所,民99年7月。
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[2] R. N. Thurston, J. Cheng, R. B. Meyer, and G. D. Boyd, “Physical mechanism of dc switching in a liquid-crystal bistable boundary layer display,” Journal of Applied Physics 56(2), 263−272 (1984).
[3] S. H. Perlmutter, D. Doroski, and G. Moddel, “Degradation of liquid crystal device performance due to selective adsorption of ions,” Applied Physics Letters 69(9), 1182–1184 (1996).

被引用紀錄


陳致友(2015)。以金屬有機骨架與高分子合成薄膜改善劣化液晶之電性〔碩士論文,中原大學〕。華藝線上圖書館。https://doi.org/10.6840/cycu201500816
蔡宗育(2014)。以金屬有機骨架/高分子複合材料回復劣化液晶之電性〔碩士論文,中原大學〕。華藝線上圖書館。https://doi.org/10.6840/cycu201400780

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