| 研究生: |
林秀玲 Lin, Hsiu-Ling |
|---|---|
| 論文名稱: |
電紡絲法製備銀/聚甲基丙烯酸甲酯複合網狀結構於透明電極之研究 Fabrication and Characterization of Electrospun Ag/PMMA Composite Webs as Transparent Electrode |
| 指導教授: |
陳引幹
Chen, In-Gann |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 材料科學及工程學系 Department of Materials Science and Engineering |
| 論文出版年: | 2012 |
| 畢業學年度: | 100 |
| 語文別: | 中文 |
| 論文頁數: | 100 |
| 中文關鍵詞: | 電紡絲 、複合纖維 、透明電極 、片電阻 、穿透率 |
| 外文關鍵詞: | Transparent electrode, Rs |
| 相關次數: | 點閱:93 下載:4 |
| 分享至: |
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本研究以電紡絲法製備三氟醋酸銀/ 聚甲基丙烯酸甲酯(CF3COOAg/PMMA)複合纖維,將複合纖維中的銀還原並裂解PMMA以獲得透明導電網狀結構,其製作方式可分為熱處理法(thermal treatment)以及紫外光處理法(UV treatment)。
熱處理法分為兩階段,第一階段為纖維中銀奈米顆粒的熱還原,第二階段為PMMA的熱裂解;以熱處理製作之透明電極其片電阻受到CF3COOAg 的摻雜含量影響,當摻雜比例為20.0 wt%時可獲得導電性佳的透明電極,片電阻為14.86 ohm/sq、穿透率32.0%;然而摻雜比例為15.3 wt%時獲得之透明電極具有片電阻42 Mohm/sq、穿透率65.4%,由於CF3COOAg 的摻雜量較少時,電紡絲複合纖維平均值徑下降,因此穿透率提高但相對也造成導電性的損失。此外本研究將對熱處理條件影響獲得之透明電極進行討論。
紫外光處理法以點光源紫外光照射電紡絲複合纖維,同時還原纖維中的銀奈米顆粒並裂解PMMA,以此法製作之透明電極性質最佳為片電阻625 ohm/sq、穿透率83.0%,已達車用顯示器之應用範圍。此外本研究對銀還原與PMMA裂解的機制進行觀察與分析,結果顯示銀奈米顆粒在極短的時間內還原於纖維中,並隨照射時間增加有集中於纖維中心的趨勢,其原因仍待進一步討論,此外亦發現短時間的紫外光照射即可使PMMA側鏈裂解。
In this study, CF3COOAg/PMMA composite fiber webs were fabricated by electrospinning. The Ag transparent electrode (TE) was obtained by reduction of Ag and degradation of PMMA from the composite fibers. The methods using to fabricate TE were thermal and UV treatment.
The thermal treatment is two step processes. First step is thermal reduction of Ag and second step is degradation of PMMA. The sheet resistance of TE is influenced by the concentration of CF3COOAg. With 20.0 wt% CF3COOAg addition, the optimal TE has sheet resistance 14.86 ohm/sq and the transmittance 32.0%. On the other hand, with 15.3 wt% CF3COOAg addition, the sheet resistance is 42 Mohm/sq and the transmittance is 65.4%. The average diameters of
electrospun composite fibers become smaller due to the low conecentration of CF3COOAg which results in elevating the transmittance and decreasing the conductivity. Besides, the heat treatment conditions of formation TE would be discussed.
The UV treatment process is irradiating the composite fiber webs by UV spotlight. The UV light reduced the Ag nanoparticles and degraded PMMA at the same time. The optimal TE has sheet resistance 625 ohm/sq and transmittance
83.0%.In addition, the mechanism of reduction of Ag and degradation of PMMA were be observed and analyzed. The results showed that Ag nanoparticles were reduced in short irradiation time and assembled in the center of the fibers with the irradiation time increased. The side chain cleavage of PMMA can be also observed within short UV irradiation time.
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