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研究生： 郭怡廷
Kuo, I Ting
論文名稱： 以石墨烯製備可撓式透明導電膜及探討其電磁波屏蔽性質
Fabrication of graphene-based flexible transparent films and study their properties for electromagnetic interference shielding
指導教授： 戴念華
Tai, Nyan Hwa
口試委員: 羅丞曜
Lo, Cheng Yao
黃繼遠
Huang, Chi Yuan
戴念華
Tai, Nyan Hwa
學位類別： 碩士
Master
系所名稱： 工學院 - 材料科學工程學系
Materials Science and Engineering
論文出版年： 2015
畢業學年度： 103
語文別： 中文
論文頁數： 93
中文關鍵詞： 電磁波屏蔽 、石墨烯 、可撓 、透明 、銀網格 、導電膜
外文關鍵詞： Electromagnetic interference shielding, graphene, flexible, transparent, silver grid, conductive film
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    • 　　本研究旨在製備一同時具備可撓性、電磁波屏蔽效率以及透光性的薄膜，期望在顯示螢幕、日常玻璃表面、電器產品外層之應用。為此，本研究分別製備透明導電薄膜及銀網格於可撓聚對苯二甲酸乙二酯(Polyethylene terephthalate, PET)高分子基板上作為屏蔽材料，探討官能基化石墨烯摻混於導電油膜、銀網格線距及結構推疊對於片電阻、電磁波屏蔽效率和透光度的影響。研究結果顯示，含1.0 wt%官能基化石墨烯導電油墨薄膜之片電阻、頻率1.2 GHz下的電磁波屏蔽效率和透光度分別為562.57 ± 9.54 Ω/sq、3.72 dB和97.36%；間距1.0 mm銀網格則是28.17 ± 14.35 Ω/sq、23.42 dB和93.45%。進一步將上述兩試片熱壓疊合後發現，其穿透度雖略降低至82.71%，但其片電阻大幅下降到1.86 ± 0.09 Ω/sq，因而致使電磁波屏蔽效率大幅提升至37.50 dB。此結果主要乃因導電油墨薄膜可以填補到銀網格之間和奈米銀顆粒的間隙中，使銀網格與透明導電薄膜緊密接觸，造成片電阻降低，故可以大幅提升電磁波屏蔽效率，而達可撓式透明電磁波屏蔽材料之目標。

    This work concentrates on preparing a film with flexibility, transparency and high electromagnetic interference shielding efficiency (EMI SE). With these properties, it can be used on monitors, glass or outer cases of electronics. Therefore, we coated graphene, conductive ink and silver grid on flexible PET substrates as shielding materials and then investigated the influence of the stacked structure on sheet resistance, EMI SE and transparency. The sheet resistance, EMI SE at frequency of 1.2 GHz and transparency of the conductive ink film containing 1 wt% functionalized graphene are 562.57 ± 9.54 Ω/sq, 3.72 dB and 97.36%, respectively, and they are 28.17 ± 14.35 Ω/sq, 23.42 dB and 93.45% for 1.0 mm spacing grid. After the aforementioned samples were hot pressed together, the transparency is measured to be 82.71%, while the EMI SE and sheet resistance become 37.50 dB and 1.86 ± 0.09 Ω/sq, respectively. The enhancement of EMI SE and the reduction of sheet resistance were due to that the conductive film tends to fill in the vacancies among grids and voids between silver particles after the hot pressing process, which compacts them tightly.

    摘要……………………………………………………………..………Ⅰ Abstract………………………………………..………………………...Ⅱ 致謝……………………………………………………………………Ⅲ 目錄………………………………………..…………………………....Ⅳ 表目錄………………………………………..………..………………..Ⅷ 圖目錄………………………………………..………..………………..Ⅸ 第一章 緒論………………………………..………..…………………..1 　1.1 前言………………………………..………..…………………….1 　1.2 研究動機………………………………..………..……………….2 第二章 文獻回顧………………………………..………..……………..4 　2.1 電磁波原理………………………………..………..…………….4 　　2.1.1 電磁波干擾理論……………………..………..……………..4 　　2.1.2 電磁波屏蔽理論……………………..………..……………..5 　2.2電磁波屏蔽材料………………………………..………..………..9 　　2.2.1 塊材(bulk) ………………………………..………..………...9 　　2.2.2 發泡材(foam) ……………………………..………..………12 　　2.2.3 薄膜(film) ……………………………..………..………......13 　2.3 石墨烯……………………………..………..………...................17 　　2.3.1 石墨烯之簡介……………………………..………..………17 　　2.3.2 石墨烯之特性……………………………..………..………18 第三章 實驗設備與步驟……………………………..………..………43 　3.1 實驗儀器……………………………..………..………...............43 　　3.1.1 電磁加熱攪拌機………………..………..………................44 　　3.1.2 離心機…………………………..………..………................44 　　3.1.3 超音波震盪機…………………..………..………................44 　　3.1.4 塗佈棒…………………………..………..………................45 　　3.1.5 噴印機…………………………..………..………................45 　　3.1.6 熱壓機…………………………..………..………................45 　　3.1.7 場發射掃描式電子顯微鏡……..………..………................46 　　3.1.8 原子力顯微鏡…………………..………..………................46 　　3.1.9 X光繞射儀………………………..………..……….............46 　　3.1.10 拉曼光譜儀………………………………………………47 　　3.1.11 霍氏轉換紅外光譜儀…………..………..………..............47 　　3.1.12 三用電表………………………..………..………..............47 　　3.1.13 電磁波屏蔽效率量測設備……..………..………..............48 　　3.1.14 紫外光/可見光分光光譜儀……..………..……….............48 　3.2 實驗步驟………………………..………..……….......................48 　　3.2.1 官能基化石墨烯之製備………………..……......................50 　　3.2.2 透明導電油墨薄膜試片製備………………..………..........51 　　3.2.3 銀網格試片製備……………..………..………....................51 　　3.2.4 熱壓疊合試片製備…………..………..………....................52 　3.3 性質分析………………..………..………............................…...52 第四章 結果與討論…………..………..………............................…....61 　4.1 石墨烯與官能基化石墨烯的分析……............................….......61 　　4.1.1 掃描式電子顯微鏡之形貌觀察…............................…........61 　　4.1.2 X射線繞射光譜分析……..………...............................…....62 　　4.1.3 拉曼光譜分析………………………………………………63 　　4.1.4 霍氏轉換紅外光譜分析…..………...............................…...64 　4.2 銀網格與透明導電油墨薄膜之形貌分析…..………...…..........64 　　4.2.1透明導電油墨薄膜形貌觀察…..………................…............64 　　4.2.2銀網格線寬觀察..............…......................................…..........65 　4.3 片電阻量測…..………...............................…..............…............66 　4.4 電磁波屏蔽效率分析...............................…..............…..............66 　　4.4.1 單片基板之金屬網格.......................…..............…...............67 　　4.4.2 熱壓疊合試片...............................…..............…...................68 　4.5 透光度量測...............................…..............….......….…..............69 　　4.6 撓曲測試……………………………………………………...70 　4.7 性質比較.......……....................…..............….......….…..............70 第五章 結論.......……....................…..............….......…......…..............85 參考文獻.......…................…..............….......……………....…..............87

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