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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 李慧梅 | |
| dc.contributor.author | Gong-Pu Liao | en |
| dc.contributor.author | 廖弓普 | zh_TW |
| dc.date.accessioned | 2021-06-13T01:07:22Z | - |
| dc.date.available | 2008-07-27 | |
| dc.date.copyright | 2007-07-27 | |
| dc.date.issued | 2007 | |
| dc.date.submitted | 2007-07-23 | |
| dc.identifier.citation | 參考文獻
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Ruoff, “ Strength and Breaking Mechanism of Multiwalled Carbon Nanotubes Under Tensile Load,” Science, 287, 637-640 (2000). Zhu, S., C. H. Su, J. C. Cochrane, S. Lehoczhy, Y. Cui, A. Burger, “ Growth Orientation of Carbon Nanotubes by Thermal Chemical Vapor Deposition,” Journal of crystal Growth, 234, 584-588 (2002). 成會明編著，張勁燕校訂，陳佩芬編輯，奈米碳管，五南圖書出版股份有限公司2004年2月 行政院環保署室內空氣品質資訊網 http://www.indoorair.org.tw/ 吳致呈，空氣負離子控制室內空氣污染物之研究，博士論文，台大環境工程研究所，2006 李芝珊，室內空氣品質與辦公大樓病態建築物症候群相關性質探討，生命科學簡訊，第13卷2期(民國88年2月) 陳彥宏，柑橘類植物果皮之超氧化物歧化酶(SOD)活性之研究，碩士論文，國立台灣大學醫學院藥理學研究所，1998 陳鴻賓、高道德，金屬物理性能及試驗，全華科技圖書股份有限公司1986年11月 機械工程手冊/電機工程手冊編輯委員會編著，金屬材料，機械工程手冊3，五南圖書出版股份有限公司2002年1月 機械工程手冊/電機工程手冊編輯委員會編著，非金屬材料，機械工程手冊4，五南圖書出版股份有限公司2002年1月 顏麗凰，利用水滴破碎產生空氣負離子之研究，碩士論文，台大環境工程研究所，2004 | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/29448 | - |
| dc.description.abstract | 本研究探討以負極放電產生空氣負離子的各項操作因子與空氣負離子之基礎特性。利用奈米碳管的特性與奈米等級的尖端於低電壓下在空氣中進行放電產生空氣負離子，進而設計微型空氣清淨裝置。實驗主要探討針尖曲率、電極直徑、電極材質、奈米碳管對起始放電電壓之影響；空氣負離子的有效距離、空氣負離子產生裝置之穩定度。使用負極放電方式產生空氣負離子，放電電極的針尖曲率愈大起始放電電壓就愈低；在相同的電極針尖曲率下，當電極直徑愈小時，其起始放電電壓亦愈低。對於不同材質的電極而言，在相同的電極直徑與針尖曲率情況下，銅有最低的起始放電電壓，其次為銀、石墨、鉛、鐵、鎢、鋁。使用奈米碳管作為負極放電產生空氣負離子之放電電極，其起始放電電壓可在0.2 kV以下，遠低於一般金屬電極。在溼度40%下，空氣負離子濃度在6.3*105 ion/cm3左右時，會有0.5 ppb的臭氧產生；在溼度70%下，空氣負離子濃度在9*105 ion/cm3左右時，開始有0.5 ppb的臭氧產生。研究顯示空氣負離子濃度會隨距離的增加呈現對數線性遞減之趨勢(logarithmic linear tendency)，在特定的對數線性距離後空氣負離子濃度隨著距離之增加呈現固定濃度。使用奈米碳管作為放電電極產生空氣負離子，在增加電壓時可以較穩定的產生空氣負離子。 | zh_TW |
| dc.description.abstract | This study investigated the operational factor and the base property of the negative air ions (NAIs) which were generated by negative electric discharge. This study also investigated the characteristics of carbon nanotubes which was used to generate negative air ions to develop a microscale air cleaner (MAC). First, this research investigated the influence of the initial discharging voltage about needle-point curvature, electrode diameter, electrode material, and the characteristics of carbon nanotubes. Second, it studied the effective distance of NAIs, stability of NAIs generator. NAIs were generated by the negative electric discharge method. The results show that the initial discharging voltage gets lower when the electrode needle-point curvature gets bigger. At the same needle-point curvature, the initial discharging voltage is lower when the electrode diameter is shorter. For different electrode material, when needle-point curvature and diameter are constant, copper had the lowest initial discharging voltage and followed by silver, graphite, lead, iron, tungsten, aluminum. The initial discharging voltage of carbon nanotubes which was used as the negative electrode to generate NAIs can be under 0.2 kV that was much lower than the initial discharging voltage of the experimental metal electrode. At relative humidity 40%, ozone was generated at 0.5 ppb when NAI concentration was about 6.3*105 ion/cm3. At relative humidity 70%, ozone was generated at 0.5 ppb when NAI concentration was about 9*105 ion/cm3. The NAI concentration decreased with the distance. The regression analysis of NAI concentration and distances from the discharge electrode indicated a logarithmic linear relationship. Additionally, more stable NAIs were generated by carbon nanotubes than other by metal electrodes when voltage was increased. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-13T01:07:22Z (GMT). No. of bitstreams: 1 ntu-96-R94541127-1.pdf: 5833042 bytes, checksum: 2de59c6ac50b7da3a55cc08fbad26c2b (MD5) Previous issue date: 2007 | en |
| dc.description.tableofcontents | 目錄
第 一 章 緒論........................................1 1-1 研究緣起.........................................1 1-2 研究目的.........................................3 1-3 研究內容與方法...................................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.............................8 2-2 空氣負離子對人體健康之影響......................11 2-3 空氣正離子對人體健康之影響......................16 2-4 奈米碳管的發現..................................16 2-5 奈米碳管之特性..................................17 2-5-1 奈米碳管之表面特性............................17 2-5-2 奈米碳管之機械特性............................18 2-5-3 奈米碳管之電磁及場發射特性....................19 2-6 奈米碳管之結構與製備............................23 2-6-1 奈米碳管之結構................................23 2-6-1-1 單壁奈米碳管................................24 2-6-1-2 多壁奈米碳管................................27 2-6-2 奈米碳管之製備................................28 2-7 奈米碳管之應用..................................32 第 三 章 實驗設備與方法.............................34 3-1 實驗系統概述....................................34 3-2 實驗設備........................................37 3-2-1 空氣負離子產生設備............................37 3-2-1-1 高壓電源供應器..............................37 3-2-1-2 放電系統....................................38 3-2-1-3 乾淨空氣供應系統............................38 3-2-1-4 空氣離子反應器..............................39 3-2-2 偵測設備與相關儀器............................39 3-2-2-1 空氣離子偵測器..............................39 3-2-2-2 溫溼度偵測器................................40 3-2-2-3 臭氧偵測器..................................40 3-3 實驗方法........................................42 3-3-1 起始放電電壓..................................42 3-3-2 針尖曲率......................................42 3-3-3 空氣負離子有效距離............................43 3-3-4 奈米碳管穩定度................................43 3-3-5 空氣負離子與臭氧濃度關係......................44 3-4 實驗安全防護....................................44 第 四 章 結果與討論.................................46 4-1 背景實驗........................................46 4-1-1 室內空氣負離子濃度............................46 4-1-2 空氣流量測試..................................48 4-1-3 流孔板實驗....................................52 4-2 起始放電電壓....................................54 4-2-1 針尖曲率與起始放電電壓之關係..................55 4-2-1-1 銅針尖曲率與起始放電電壓之關係..............55 4-2-1-2 銀針尖曲率與起始放電電壓之關係..............60 4-2-1-3 鎢針尖曲率與起始放電電壓之關係..............65 4-2-1-4 石墨針尖曲率與起始放電電壓之關係............70 4-2-1-5 碳纖維針尖曲率與起始放電電壓之關係..........75 4-2-2 電極直徑與起始放電電壓之影響..................80 4-2-3 不同電極材質與起始放電電壓之影響..............84 4-2-4 奈米碳管之起始放電電壓........................93 4-3 空氣負離子與臭氧之關係..........................99 4-4 空氣負離子有效作用距離.........................105 4-5 空氣負離子產生裝置之穩定度.....................107 第 五 章 結論與建議................................114 5-1 結論...........................................114 5-2 建議...........................................115 | |
| dc.language.iso | zh-TW | |
| dc.subject | 針尖曲率 | zh_TW |
| dc.subject | 負極放電 | zh_TW |
| dc.subject | 空氣負離子 | zh_TW |
| dc.subject | 奈米碳管 | zh_TW |
| dc.subject | 起始放電電壓 | zh_TW |
| dc.subject | needle-point curvature | en |
| dc.subject | negative electric discharge | en |
| dc.subject | negative air ions (NAIs) | en |
| dc.subject | carbon nanotubes | en |
| dc.subject | initial discharging voltage | en |
| dc.title | 奈米碳管放電產生空氣負離子微型裝置之研究 | zh_TW |
| dc.title | Development of Microscale Air Ionizer -- Generation of Negative air Ions by Carbon-nanotube Electric Discharging | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 95-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 袁中新,羅金翔 | |
| dc.subject.keyword | 負極放電,空氣負離子,奈米碳管,起始放電電壓,針尖曲率, | zh_TW |
| dc.subject.keyword | negative electric discharge,negative air ions (NAIs),carbon nanotubes,initial discharging voltage,needle-point curvature, | en |
| dc.relation.page | 123 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2007-07-23 | |
| 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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