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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 謝國煌(Kuo-Huang Hsieh) | |
dc.contributor.author | Jia-Min Suen | en |
dc.contributor.author | 孫嘉敏 | zh_TW |
dc.date.accessioned | 2021-06-17T02:14:36Z | - |
dc.date.available | 2027-11-09 | |
dc.date.copyright | 2018-03-01 | |
dc.date.issued | 2017 | |
dc.date.submitted | 2017-11-10 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/68199 | - |
dc.description.abstract | 本研究有三個部分,奈米銀線的穩定性探討、防電磁波泡棉的開發、雙軸靜電紡絲奈米銀線之懸浮液與薄膜導電性。
奈米銀線於性質方面有很好導電性及光學性質,其分散液也可利用簡單的噴塗方式來製備薄膜,不僅導電性好也有潛力發展成可撓性薄膜,再加上奈米銀線的製備成本低。故是一種極有潛力取代舊有ITO材料來應用於電子產品中。但由於奈米銀線在高溫時的不穩定性(高溫形變),變成了奈米銀線在應用上的一個障礙。故本研究的第一部分則是希望能克服奈米銀線的高溫形變,我們利用噴灑塗佈的方式來製備薄膜,並控制氧化石墨烯(GO)與奈米銀線的比例,成功的克服奈米銀線會高溫形變的問題。 第二部分實驗--防電磁波泡棉的開發。因為現今科技的發達,電子產品的廣泛應用,產生的電磁輻射污染成為了一個潛在的問題。而我們利用簡單的含浸方式,使用了石墨烯(N006)、鋁片、奈米銀線並混合高分子黏著劑,讓原本沒有預防電磁波效果的PU泡棉,附著上填料後達到將近22 dB的防電磁波泡棉。 第三部分實驗與第一部分實驗有關,由於奈米銀線的密度大,要讓奈米銀線懸浮是一件不容易的事。我們使用雙軸電紡的方式,讓親水的聚乙烯吡咯烷酮(Polyvinylpyrrolidone, PVP)當外軸包覆內軸的銀線,當回溶到水中後PVP即可當懸浮劑且因銀線外有PVP的包覆而自然的懸浮在水中,並以外加硝酸銀的方式來提升薄膜的導電性。 | zh_TW |
dc.description.abstract | The thesis is divided into three parts: stability of silver nanowires、foam for electromagnetic interference shielding、 fabrication of silver suspension by coaxial electrospinning process and conductive thin film.
Silver nanowires have electrical and optical properties. Suspension of silver nanowires can be made the thin film by spray coating. The thin film based on silver nanowires not only have conductivity but also have the potential to develop into flexible films. So silver nanowires have the potential to replace ITO. Because silver nanowires is unstability at high temperature, it is the obstacle of application of silver nanowires. So the first part, we want to overcome the unstability of silver nanowires at high temperature. We have successfully stabilized the silver wire using graphene oxide(GO) by spray coating. The the second part, fabrication of graphene-foam composites for electromagnetic interference shieding. Because of the widespread use of electronic products, resulting in electromagnetic radiation pollution has become a potential problem. So the materials for EMI shielding have received attention. We fabricated the graphene-foam with 20 dB by dipping the foam into graphene and Al/or silver nanowires solution. The last part, we fabricated suspension of silver nanowires by coaxial electrospinning process. That is Polyvinylpyrrolidone,(PVP) as shell and AgNO3 as core。Because PVP is hydrophilic, PVP can be a suspending agent. Because silver nanowires is coated with PVP, silver nanowires can dispered in aqueous phase. Then we fabricated the film by drop coating, and we added AgNO3 in the suspension to enhance electrical of the film. | en |
dc.description.provenance | Made available in DSpace on 2021-06-17T02:14:36Z (GMT). No. of bitstreams: 1 ntu-106-R04524087-1.pdf: 8927499 bytes, checksum: 8fa5a62913f3047c0d780d8895dd5de1 (MD5) Previous issue date: 2017 | en |
dc.description.tableofcontents | 目錄
誌謝 I 中文摘要 III Abstract IV 目錄 V 圖目錄 VIII 表目錄 XIII 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 3 2.1 奈米銀線之簡介 3 2.1.1 奈米銀線的發展 3 2.1.2 奈米銀線的穩定性 4 2.2 電磁波與抗電磁波原理 8 2.2.1 電磁波與電磁波干擾之介紹 8 2.2.2 電磁波干擾屏蔽效應 9 2.2.3 防電磁波材料的介紹 13 2.3 靜電紡絲之簡介 17 2.3.1 靜電紡絲原理 17 2.3.3靜電紡絲參數 19 2.3.2 靜電紡絲裝置 22 第三章 實驗方法與原理 24 3.1 實驗藥品 24 3.2 實驗儀器 27 3.3 實驗步驟 29 3.3.1 銀線穩定性 29 3.3.2 EMI泡棉實驗步驟 30 3.3.3 雙軸電紡奈米銀線的懸浮與導電性 32 3.4 材料的性質測定 34 3.4.1 超高解析場發射電子顯微鏡觀察表面型態 34 3.4.2能量分散光譜儀之元素分析 34 3.4.3 X-射線光電光譜做材料表面的元素分析 34 3.4.4 導電薄膜電阻的測量 35 3.4.5動態光散射粒徑及界面電位分析儀 35 3.4.6簡易式EMI的測定 35 3.4.7動態熱機械分析儀測定泡棉性質 35 第四章 結果與討論 36 4.1 銀線穩定性 36 4.1.1 氧化石墨烯(GO)對奈米銀線(AgNW)的穩定性 36 4.1.2 銀線的光穩定性 44 4.1.3 奈米銀線的熱穩定性 50 4.1.4 加入binder模擬導電膜的穩定性 54 4.2.2 不同金屬漿料對EMI的影響 66 4.2.3 防電磁波泡棉的機械性質測定 70 4.3雙軸靜電紡絲 73 4.3.1 內外軸比例的影響 73 4.3.2 電紡回溶液與外加硝酸銀之懸浮性 76 4.3.3 電紡懸浮液之薄膜電性 86 第五章 結論 95 參考文獻 97 圖目錄 圖2-1反應溫度影響Ag@TiO2奈米線的型態[5] 5 圖2-2 (a) Ag@TiO2奈米線的合成示意圖(b)不同厚度TiO2(c)不同溫度燒結情形[6] 5 圖2-3石墨烯與奈米銀線薄膜的製備示意圖[4] 6 圖2-4電磁波得示意圖[12] 8 圖2-5 EMI屏蔽機制圖[16] 10 圖2-6反射與多重反射機制間的差異圖[20] 12 圖2-7導電板中的屏蔽示意圖[20] 12 圖2-8奈米碳管20 wt%含量的奈米碳管/PU膜SEM圖[26] 14 圖2-9石墨烯含量1.8 vol%的石墨烯/PMMA複合材料之SEM圖[24] 14 圖2-10靜電紡絲裝置圖[30] 18 圖2-11高分子濃度(黏度)對纖維的影響[35] 19 圖2-12 施加電壓對纖維的影響[37] 20 圖2-13並排噴絲頭的電紡裝置[38] 22 圖2-14雙軸電紡的裝置圖[30] 23 圖2-15有無PVP包覆硝酸銀的電紡差異[42] 23 圖3-1奈米銀線穩定性實驗步驟示意圖 29 圖3-2為電磁波屏蔽泡棉實驗步驟示意圖 31 圖3-3雙軸電紡奈米銀線及懸浮性與膜導電性測試實驗示意圖 33 圖4-1噴塗不同濃度銀線電阻隨燒結時間的變化 38 圖4-2有GO基底下噴塗不同濃度銀線電阻隨燒結時間的變化 39 圖4-3不同濃度GO基底下相同濃度銀線電阻隨燒結時間的變化 40 圖4-4 不同濃度GO基底下相同濃度銀線電阻隨燒結時間的變化 41 圖4-5 (a)0.375wt%奈米銀線(b) 0.75wt%奈米銀線(c) 0.75wt%奈米銀線 /0.1125wt%GO(d) 0.375wt%奈米銀線/0.225wt%GO為加熱前的SEM圖;(a’)(a’’)0.375wt%奈米銀線(b’)(b’’) 0.75wt%奈米銀線(c’) 0.75wt%奈米銀線/0.1125wt%GO(d’) 0.375wt%奈米銀線/0.225wt%GO為加熱後的SEM圖 43 圖4-6不同量GO的表面粗糙度(a) 0.1125wt% GO算數平均粗糙度(Ra)為1.544x102~1.94 x102nm;(b) 0.225wt% GO算數平均粗糙度(Ra)為2.12x102~2.32 x102nm 43 圖4-7有光照下不同濃度GO基底下相同濃度銀線電阻隨燒結時間的變化 45 圖4-8無光照下不同濃度GO基底下相同濃度銀線電阻隨燒結時間的變化 46 圖4-9有光照下不同濃度GO基底下相同濃度銀線電阻隨燒結時間的變化 47 圖4-10無光照下不同濃度GO基底下相同濃度銀線電阻隨燒結時間的變化 48 圖4-11加熱前(a)0.75wt%奈米銀線(b) 0.75wt%奈米銀線/0.1125wt% GO(c) 0.375wt%奈米銀線/0.225wt% GO的SEM圖;光照加熱後(a’)0.75wt%奈米銀線(b’) 0.75wt%奈米銀線/0.1125wt% GO(c’) 0.375wt%奈米銀線/0.225wt% GO的SEM圖;無光照加熱後(a’’)0.75wt%奈米銀線(b’’) 0.75wt%奈米銀線/0.1125wt% GO(c’’) 0.375wt%奈米銀線/0.225wt% GO的SEM圖 49 圖4-12不同溫度下奈米銀線電阻隨燒結時間的變化 50 圖4-13不同溫度下有GO基底的奈米銀線電阻隨燒結時間的變化 51 圖4-14 XPS分析圖(a)加熱前有無GO的奈米銀線(b)加熱前後的奈米銀線(c)有GO時熱前後的奈米銀線 53 圖4-15 加入不同量binder於1600C加熱其電阻與時間的變化 55 圖4-16 加入不同量binder於1600C加熱其電阻與時間變化的趨勢 56 圖4-17 加入不同量binder於1200C加熱其電阻與時間的變化 57 圖4-18加入不同量binder於1200C加熱其電阻與時間變化的趨勢 58 圖4-19加熱前(a) 0.75-0.075 (b) 0.75-0.075/0.1125 (c) 0.75-0.075/0.1125-0.014 (d) 0.75-0.075/0.1125-0.056的SEM圖;1600C加熱後(a’) 0.75-0.075 (b’) 0.75-0.075/0.1125 (c’) 0.75-0.075/0.1125-0.014 (d’) 0.75-0.075/0.1125-0.056的SEM圖;1200C加熱後(a’’) 0.75-0.075 (b’’) 0.75-0.075/0.1125 (c’’) 0.75-0.075/0.1125-0.014 (d’’) 0.75-0.075/0.1125-0.056的SEM圖 59 圖4-20 (a)N4-M1.67將料分相(b) N4-M6正面(c) N4-M6背面 62 圖4-21固定TUE-165 binder改變N006量的漿料,泡棉1000C烘乾EMI值的變化 63 圖4-22固定TUE-165 binder改變N006量的漿料,泡棉600C烘乾EMI值的變化 64 圖4-23固定TUE-165 binder改變N006量的漿料,泡棉1500C烘乾EMI值的變化 65 圖4-24 N4-T5與N6-T5含浸奈米銀線/TUE-165漿料烘乾後的EMI值變化 67 圖4-25 N4-T5含浸不同鋁含量的漿料烘乾後的EMI值變化 68 圖4-26 N6-T5含浸不同鋁含量的漿料烘乾後的EMI值變化 69 圖4-27相同4gN006含量漿料與不同金屬漿料及含量之泡棉的(a) 為tanσ圖(c)為儲存模式(E’)圖(e)損耗模數(E’’)圖;相同6gN006含量漿料與不同金屬漿料及含量之泡棉的(b)為 tanσ圖(d)為儲存模式(E’)圖(f)為損耗模數(E’’)圖 71 圖4-28分別在固定金屬漿料與含量下不同N006漿料之泡棉的(a)(d)(g)(i)為 tanσ圖(b)(e)(h)(k)為儲存模式(E’)圖(c)(f)(i)(l)為損耗模數(E’’)圖 72 圖4-29電紡纖維回溶前有無1200C annealing的差異 74 圖4-30內軸增加PVP之電紡纖維回溶前有無1200C annealing的差異 74 圖4-31固定內軸硝酸銀濃度,改變外軸PVP濃度對電紡纖維回溶後的影響 74 圖4-32固定外軸硝PVP濃度,改變內軸硝酸銀濃度對電紡纖維回溶後的影響 75 圖4-33外加硝酸銀電紡回溶液的懸浮情況,由左至右為1wt%電紡液、1wt%電紡液/0.1wt%硝酸銀、1wt%電紡液/0.5wt%硝酸銀、1wt%電紡液/1wt%硝酸銀、1wt%PVP/0.5wt%硝酸銀 78 圖4-34外加硝酸銀電紡回溶液的懸浮情況,由左至右為1wt%電紡液/3wt%硝酸銀、 wt%電紡液/5wt%硝酸銀、1wt%電紡液/8wt%硝酸銀、1wt%電紡液/10wt%硝酸銀 79 圖4-35 (a) 1wt%電紡液(b) 1wt%電紡液/0.5wt%硝酸銀(c) 1wt%電紡液/3wt%硝酸銀(d) 1wt%電紡液/10wt%硝酸銀(e) 1wt%PVP/3wt%硝酸銀的界面電位圖;(a’) 1wt%電紡液(b’) 1wt%電紡液/0.5wt%硝酸銀(c’) 1wt%電紡液/3wt%硝酸銀(d’) 1wt%電紡液/10wt%硝酸銀(e’) 1wt%PVP/0.5wt%硝酸銀的粒徑分佈圖 84 圖4-36懸浮機制示意圖 85 圖4-37外加硝酸銀濃度低於1wt%的懸浮液之薄膜加熱後仍沒有電性(a)加熱前的薄膜(a’)2000C加熱6小時後的薄膜 87 圖4-38 放置1天的懸浮液所製成的薄膜(a)加熱前(b) 2000C加熱2小時(c) 2000C加熱4小時(d) 2000C加熱6小時 88 圖4-39放置10天的懸浮液所製成的薄膜(a)加熱前(b) 2000C加熱2小時(c) 2000C加熱4小時(d) 2000C加熱6小時 89 圖4-40 加熱前薄膜表面SEM圖(a)1wt%電紡溶液(b)放置一天的1wt%電紡溶液/3wt%硝酸銀(c)放置十天的1wt%電紡溶液/3wt%硝酸銀(d)放置一天的1wt%電紡溶液/10wt%硝酸銀(e)放置十天的1wt%電紡溶液/10wt%硝酸銀;(a’)(b’)(c’)(d’)(e’)為(a)(b)(c)(d)(d)的放大倍率圖 91 圖4-41 2000C加熱6小時後薄膜表面SEM圖(a)1wt%電紡溶液(b)放置一天的1wt%電紡溶液/3wt%硝酸銀(c)放置十天的1wt%電紡溶液/3wt%硝酸銀(d)放置一天的1wt%電紡溶液/10wt%硝酸銀(e)放置十天的1wt%電紡溶液/10wt%硝酸銀;(a’)(b’)(c’)(d’)(e’)為(a)(b)(c)(d)(d)的放大倍率圖 93 圖4-42 2000C加熱6小時後,薄膜截面SEM圖。(a)外加3wt%硝酸銀懸浮液(b)外加10wt%硝酸銀懸浮液 94 圖4-43放置一天外加3wt%硝酸銀懸浮液之薄膜的EDS(a)加熱前結塊處:(b)加熱前平坦處:(c)加熱後相較於(a)的凸起處:(d)加熱後相較於(b)的平坦處 94 表目錄 表2-1 ITO重要應用元件的透明電極的主要性能要求[2] 4 表2-2為近十年來對於奈米銀線穩定性研究之文獻 7 表2-3屏蔽效果與dB值對照表[15] 9 表2-4為近十年電磁波屏蔽材料研究之文獻 15 表3-1 N006與M-35型高分子黏著劑漿料比例調配 30 表3-2 N006與TUE-165型高分子黏著劑漿料比例調配 30 表3-3奈米銀線(AgNW)與TUE-165型高分子黏著劑漿料比例調配 31 表3-4鋁(Al)與TUE-165型高分子黏著劑漿料比例調配 31 表3-5雙軸電紡內外軸配方 32 表3-6電紡水溶液外加AgNO3配方 33 表4-1噴塗不同濃度銀線電阻隨燒結時間的變化 38 表4-2有GO基底下噴塗不同濃度銀線電阻隨燒結時間的變化 39 表4-3不同濃度GO基底下相同濃度銀線電阻隨燒結時間的變化 40 表4-4不同濃度GO基底下相同濃度銀線電阻隨燒結時間的變化 41 表4-5有光照下不同濃度GO基底下相同濃度銀線電阻隨燒結時間的變化 45 表4-6無光照下不同濃度GO基底下相同濃度銀線電阻隨燒結時間的變化 46 表4-7有光照下不同濃度GO基底下相同濃度銀線電阻隨燒結時間的變化 47 表4-8無光照下不同濃度GO基底下相同濃度銀線電阻隨燒結時間的變化 48 表4-9不同溫度下奈米銀線電阻隨燒結時間的變化 50 表4-10不同溫度下有GO基底的奈米銀線電阻隨燒結時間的變化 51 表4-11 加入不同量binder於1600C加熱其電阻與時間的變化 55 表4-12 加入不同量binder於1600C加熱其電阻與時間變化的趨勢 56 表4-13加入不同量binder於1200C加熱其電阻與時間的變化 57 表4-14加入不同量binder於1200C加熱其電阻與時間變化的趨勢 58 表4-15不同量的M-35型高分子黏著劑與N006漿料 62 表4-16固定TUE-165 binder改變N006量的漿料,泡棉1000C烘乾EMI值的變化 64 表4-17固定TUE-165 binder改變N006量的漿料,泡棉600C烘乾EMI值的變化 64 表4-18固定TUE-165 binder改變N006量的漿料,泡棉1500C烘乾EMI值的變化 65 表4-19 N4-T5與N6-T5含浸奈米銀線/TUE-165漿料烘乾後的EMI值變化 67 表4-20 N4-T5含浸不同鋁含量的漿料烘乾後的EMI值變化 68 表4-21 N6-T5含浸不同鋁含量的漿料烘乾後的EMI值變化 69 表4-22放置1天懸浮液之薄膜於2000C下加熱電阻隨加熱時間的變化 88 表4-23放置10天懸浮液之薄膜於2000C下加熱電阻隨加熱時間的變化 89 | |
dc.language.iso | zh-TW | |
dc.title | 奈米銀線的製備及穩定性探討與防電磁波材料之研究 | zh_TW |
dc.title | Fabrication and Stability of Silver Nanowires and Fabrication of graphene-foam for Electromagnetic Interference Shieding | en |
dc.type | Thesis | |
dc.date.schoolyear | 106-1 | |
dc.description.degree | 碩士 | |
dc.contributor.coadvisor | 邱文英(Wen-yen chiu) | |
dc.contributor.oralexamcommittee | 戴子安(Chi-An Dai),董崇民(Trong-ming Don),李佳芬(Jia-Fen Li) | |
dc.subject.keyword | 奈米銀線,聚乙烯?咯烷酮,雙軸電紡,氧化石墨烯,石墨烯,電磁波干擾,泡棉, | zh_TW |
dc.subject.keyword | silver nanowires,Polyvinylpyrrolidone,coaxial electrospinning,graphene oxide,graphene,foam,EMI shieding, | en |
dc.relation.page | 103 | |
dc.identifier.doi | 10.6342/NTU201704351 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2017-11-13 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 化學工程學研究所 | zh_TW |
顯示於系所單位: | 化學工程學系 |
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