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研究生： 張智欽
Chih-Chin Chang
論文名稱： 軟性導電薄膜之改質及高分子分散液晶元件的光電性質研究
The modification and the optoelectronic performance of soft conducting film for polymer dispersed liquid crystal devices
指導教授： 楊銘乾
Ming-Chien Yang
口試委員: 吳昌謀
Chang-Mou Wu
周啟雄
Chi-Hsiung Jou
學位類別： 碩士
Master
系所名稱： 工程學院 - 材料科學與工程系
Department of Materials Science and Engineering
論文出版年： 2017
畢業學年度： 105
語文別： 中文
論文頁數： 84
中文關鍵詞： 高分子分散液晶元件 、導電高分子 、導電性改質
外文關鍵詞： Polymer disperse liquid crystal device, conductive polymer, treatment of conductivity
相關次數： 點閱：346  下載：1 
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  •  上一筆

    • 近年來，由於節能減碳之潮流下，所使用的建物窗戶之隔熱以及可調控光穿透效果已愈趨重要，傳統玻璃已不符使用於現代化綠建築。然而，結合高分子材料及液晶材料之各自優點，其所製成之光學元件已被廣泛的研究與應用，其中高分子分散液晶(Polymer dispersed liquid crystal, PDLC)為現今實用性最廣且不需使用偏光片之調光元件。
    本研究主要目的為製備可為實驗室研究用的大面積PEDOT薄膜，利用實驗室內的塗佈機搭配狹縫式塗佈設備，並以浸泡及表面覆蓋兩種方法，及使用不同溶液等方式予以改質，並透過四點探針以SEM等方法計算改質前後薄膜導電率的變化，以找出最佳化的改質比例。
    其次，將PEDOT軟性導電薄膜製成PDLC元件，且透過添加不同大小之間隙物(spacer)，及不同的光照強度與時間，量測所得元件之穿透度、霧度以及應答速率，以最佳化PDLC試片製作參數條件。

    Energy saving and carbon reduction have become a trend in recent years. Thus in this trend, a building window with adjustable light transmittance become appealing. Traditional glass is gradually eliminated on green building nowadays. In addition, optical devices made of polymer and liquid crystal materials have been widely studied and used. In particular, polymer dispersed liquid crystal (PDLC) is most extensively used for light adjustable devices without polarizer.

    In this study, PEDOT was coated onto PET substrates to make PDLC- based light adjustable devices. Firstly, PEDOT:PSS was applied to PET substrate using slot die coating machine, then the substrate was treated by co-solvents of ethylene glycol and methanol by immersion or dropping on the substrate to remove PSS. The conductivity of the resultant substrates were determined using four-point probe in order to optimize the ratio of the solvent. Next, PDLC solution was sandwiched between two PEDOT substrates and UV-cured to make light adjustable devices. The performance of such devices depended on the size of spacer, and the UV intensity and curing time of the PDLC layer. The transmittance, the degree of haze and the response time were measured to optimize the parameters of making PDLC-based devices.

    摘要 I Abstract II 第一章 緒論 1 1.1 前言 1 1.2 PEDOT介紹 2 1.3 液晶介紹 6 1.3.1液晶的發現 6 1.3.2液晶的分類 7 1.3.3液晶的物理特性 12 1.4 塗佈方式介紹 13 1.5 PDLC介紹 16 1.5.1 PDLC原理 16 1.5.2 PDLC製備 18 1.6 PSCT介紹 20 第二章 研究背景與目的 22 2.1文獻回顧 22 2.2 研究背景 24 第三章 實驗內容 25 3.1 實驗系統概述 25 3.2 實驗材料及設備 25 3.2.1 材料 25 3.2.2 設備 27 3.3 實驗步驟 28 3.4 實驗方法 29 3.4.1 PEDOT-PET薄膜製作 29 3.4.2 PDLC元件製作 30 3.5 實驗量測原理與方法 33 3.5.1 導電率測量 33 3.5.2 FTIR 34 3.5.3 霧度測量 35 3.5.4 穿透度測量 36 3.5.5 應答速率測量 37 第四章 結果與討論 39 4.1 第一部分 39 4.1.1 改質化合物種類選擇 39 4.1.2 改質比例 40 4.1.3 改質薄膜SEM觀測 42 4.1.4 改質薄膜穿透度測量 49 4.1.5 FTIR測量 50 4.2 第二部分 52 4.2.1 PDLC霧度測量 52 4.2.2 PDLC穿透度測量 53 4.2.3 PDLC應答速率測量 58 4.2.4 不同角度穿透度測量 59 4.2.5 ITO與PET穿透度的比較 63 4.2.6 SEM觀測圖 65 4.2.7 POM觀測圖 68 第五章 結論 70 第六章 參考文獻 72

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