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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 李慧梅 | |
dc.contributor.author | Chin-Chieh Lin | en |
dc.contributor.author | 林瑾杰 | zh_TW |
dc.date.accessioned | 2021-06-07T17:53:56Z | - |
dc.date.copyright | 2012-08-18 | |
dc.date.issued | 2012 | |
dc.date.submitted | 2012-08-16 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/15862 | - |
dc.description.abstract | 本研究之主要目的在探討定量分析0.5mg、1.0mg、1.5mg重量之奈米碳管,於負極放電產生空氣負離子濃度變化及相互關係。並利用奈米碳管之場發特性,進而設計高濃度,高穩定性且具備經濟效益,市場高競爭性之微型空氣清淨裝置。
實驗並探討包含奈米碳管長徑比、奈米碳管重量、電極基板材質、奈米碳管對起始電壓、生物有效性濃度之電壓與極限電壓的影響、空氣負離子之穩定度及監測可能產生之臭氧副產物。 奈米碳管長徑比愈大,其場增強效應(enhanced field emission)愈大,所以放電電壓越低。對於不同電極基板而言,在奈米碳管長徑比及重量相同情況下,鐵有最低的測試電壓。定量不同奈米碳管時,以定量1.5mg奈米碳管時,有最低之測試電壓。在相同電壓下奈米碳管長徑比愈大,負極放電產生空氣負離子濃度之穩定度愈好。 利用間歇放電產生空氣負離子的穩定度遠高於連續放電。關閉電場40sec 後再重新開啟電場一分鐘的方式可讓空氣負離子濃度維持在4.0×105ions/cm3 以上超過30分鐘。在定量1.5mg奈米碳管的鐵電極基板上,於電壓2.3 kV 即可達至空氣負離子濃度之極限偵測範圍,並且臭氧的產生,濃度才增加至0.5 ppb,此數值遠低於室內空氣品質建議值0.03 ppm,故不會有臭氧污染問題。 | zh_TW |
dc.description.provenance | Made available in DSpace on 2021-06-07T17:53:56Z (GMT). No. of bitstreams: 1 ntu-101-P98541202-1.pdf: 2090409 bytes, checksum: debb04df20fd54f3639d457831e9339d (MD5) Previous issue date: 2012 | en |
dc.description.tableofcontents | 目 錄
摘要………………………………………………………………………i Abstract…………………………………………………………………ii 目錄………………………………………………………………………Ⅰ 圖目錄……………………………………………………………………Ⅴ 表目錄……………………………………………………………………Ⅸ 符號說明…………………………………………………………………Ⅹ 第一章 前言………………………………………………………………1 1-1 研究緣起……………………………………………………………1 1-2 研究目的……………………………………………………………2 1-3 研究方法與內容……………………………………………………3 第二章 文獻回顧…………………………………………………………5 2-1 空氣離子……………………………………………………………5 2-1-1空氣離子之物理特性……………………………………………6 2-1-2空氣離子之化學特性……………………………………………7 2-1-3空氣負離子對人體健康的影響…………………………………10 2-1-4空氣負離子對室內外空氣品質的影響…………………………14 2-2 奈米碳管的發現及其構造…………………………………………16 2-3 奈米碳管的製程……………………………………………………20 2-3-1電弧放電法………………………………………………………20 2-3-2雷射蒸發法………………………………………………………21 2-3-3化學氣相沉積法…………………………………………………21 2-4 奈米碳管之特性……………………………………………………23 2-4-1奈米碳管之機械特性……………………………………………23 2-4-2奈米碳管的場發射性質…………………………………………25 2-5 奈米碳管之應用與未來發展………………………………………28 2-5-1 奈米碳管之應用…………………………………………………28 2-5-2 奈米碳管放電產生空氣負離子之應用…………………………29 2-5-3 奈米碳管之未來發展……………………………………………30 2-6 奈米碳管毒性及暴露評估的研究現況……………………………31 2-6-1 奈米碳管之毒性評估……………………………………………32 2-6-2 奈米碳管之暴露評估……………………………………………35 第三章 實驗方法與設備………………………………………………36 3-1 實驗系統概述………………………………………………………36 3-2 實驗設備與儀器……………………………………………………39 3-2-1空氣負離子產生系統……………………………………………39 3-2-1-1高壓電源供應器………………………………………………39 3-2-1-2放電系統………………………………………………………40 3-2-1-3乾淨空氣供應系統……………………………………………40 3-2-1-4空氣離子反應器………………………………………………40 3-2-2偵測設備與相關儀器……………………………………………41 3-2-2-1奈米碳管重量偵測設備………………………………………41 3-2-2-2空氣負離子偵測器……………………………………………41 3-2-2-3臭氧偵測器……………………………………………………42 3-3 實驗方法……………………………………………………………43 3-3-1 定量奈米碳管……………………………………………………43 3-3-2 起始電壓、對生物醫療有效性電壓、極限電壓………………44 3-3-3 金屬電極特性……………………………………………………45 3-3-4 奈米碳管特性……………………………………………………45 3-3-5空氣負離子之穩定性……………………………………………46 3-3-6奈米碳管放電產生臭氧…………………………………………46 第四章 結果與討論……………………………………………………47 4-1 空氣負離子背景實驗………………………………………………47 4-1-1實驗室空氣負離子背景濃度實驗………………………………47 4-1-2空氣負離子之溼度測試實驗……………………………………48 4-1-3空氣流量對空氣負離子濃度之影響……………………………51 4-2 金屬電極與半導體電極放電電壓與空氣負離子濃度關係………54 4-2-1不同材質之基體在單壁奈米碳管(長徑比666.66~1333.33)放電電壓與空氣負離子濃度關係……………………………………………54 4-2-2不同材質基體在單壁奈米碳管(長徑666.66~3333.33)放電電壓與空氣負離子濃度關係…………………………………………………56 4-2-3不同材質基體在多壁奈米碳管(長徑比333.33~1333.33)放電電壓與空氣負離子濃度關係………………………………………………57 4-2-4不同材質基體在多壁奈米碳管(長徑比1666.66~5000 )放電電壓與空氣負離子濃度關係…………………………………………………58 4-3 奈米碳管長徑比對放電電壓與空氣負離子的影響………………64 4-3-1銅電極基體於不同奈米碳管長徑比對放電電壓之影響………65 4-3-2鋁電極基體於不同奈米碳管長徑比對放電電壓之影響………67 4-3-3 鐵電極基體於不同奈米碳管長徑比對放電電壓之影響………69 4-3-4矽晶圓基體於不同奈米碳管長徑比對放電電壓之影響………71 4-4 定量0.5mg、1.0mg、1.5mg之奈米碳管與放電電壓之關係……76 4-4-1 奈米碳管實驗前後重量之差異關係……………….…………77 4-4-2 定量0.5mg、1.0mg、1.5mg三種重量之奈米碳管在銅電極基體上對放電電壓之影響……………………………………………………78 4-4-3 定量0.5mg、1.0mg、1.5mg三種重量之奈米碳管在鋁電極基體上對放電電壓之影響……………………………………………………83 4-4-4 定量0.5mg、1.0mg、1.5mg三種重量之奈米碳管在鐵電極基體上對放電電壓之影響……………………………………………………88 4-4-5 定量0.5mg、1.0mg、1.5mg三種重量之奈米碳管在矽晶圓電極基體上對放電電壓之影響………………………………………………93 4-5 奈米碳管放電產生空氣負離子之穩定度………………………100 4-5-1 不同電壓對空氣負離子濃度穩定度之影響…………………100 4-5-2 奈米碳管長徑比對放電穩定度之影響………………………104 4-5-3 間歇放電對放電穩定度之影響………………………………108 4-6 奈米碳管放電產生臭氧之偵測…………………………………114 第五章 結論與建議……………………………………………………119 5-1 結論………………………………………………………………119 5-2 建議………………………………………………………………121 參考文獻………………………………………………………………122 附錄……………………………………………………………………134 | |
dc.language.iso | zh-TW | |
dc.title | 奈米碳管重量對放電產生空氣負離子影響之研究 | zh_TW |
dc.title | Effect of Carbon-Nanotubes Mass on the Generation of Negative Air Ions | en |
dc.type | Thesis | |
dc.date.schoolyear | 100-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 曾昭衡,羅金翔,吳致呈 | |
dc.subject.keyword | 奈米碳管,空氣負離子,負極放電,場增強效應,脈衝放電, | zh_TW |
dc.subject.keyword | carbon-nanotubes (CNTs),negative air ions (NAIs),negative electric discharging,field emission,pulsed corona, | en |
dc.relation.page | 136 | |
dc.rights.note | 未授權 | |
dc.date.accepted | 2012-08-17 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 環境工程學研究所 | zh_TW |
顯示於系所單位: | 環境工程學研究所 |
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