請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/45829
完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 李世光 | |
dc.contributor.author | Chien-Kai Tseng | en |
dc.contributor.author | 曾建凱 | zh_TW |
dc.date.accessioned | 2021-06-15T04:46:54Z | - |
dc.date.available | 2013-08-01 | |
dc.date.copyright | 2010-08-12 | |
dc.date.issued | 2010 | |
dc.date.submitted | 2010-08-05 | |
dc.identifier.citation | 1. http://www.emolabs.com/emoproducts/history.html.
2. Johnson, M.K. and D.M. Abelson, DIAPHRAGM MEMBRANE AND SUPPORTING STRUCTURE RESPONSIVE TO ENVIRONMENTAL CONDITIONS. 2008. 3. Sugimoto, T., et al., Loudspeakers for flexible displays. Acoustical Science and Technology, 2009. 30(2): p. 151-153. 4. http://www.cbifamily.com/digi/digitopic/1198762184d339.html. 5. www.hifinb.com/showtopic-144599.html. 6. http://www.kingsaudio.com.hk/china/technology.html. 7. Xiao, L., et al., Flexible, Stretchable, Transparent Carbon Nanotube Thin Film Loudspeakers. Nano Letters, 2008. 8(12): p. 4539-4545. 8. Yu, X., et al., Carbon nanotube-based transparent thin film acoustic actuators and sensors. Sensors and Actuators a-Physical, 2006. 132(2): p. 626-631. 9. http://www.about-electronics.eu/2009/04/03/new-flat-flexible-speakers-might-even-help-you-catch-planes-trains/. 10. http://college.itri.org.tw/TopicLearn.aspx?id=230. 11. McCarty, L.S. and G.M. Whitesides, Electrostatic charging due to separation of ions at interfaces: Contact electrification of ionic electrets. Angewandte Chemie-International Edition, 2008. 47(12): p. 2188-2207. 12. Behrendt, N., et al., Morphology and electret behaviour of microcellular high glass temperature films. Applied Physics a-Materials Science & Processing, 2006. 85(1): p. 87-93. 13. Wegener, M., et al., Two-step inflation of cellular polypropylene films: void-thickness increase and enhanced electromechanical properties. Journal of Physics D, Applied Physics, 2004. 37(4): p. 623-627. 14. Wegener, M., W. Wirges, and B. Tiersch, Porous polytetrafluoroethylene (PTFE) electret films: porosity and time dependent charging behavior of the free surface. Journal of Porous Materials, 2007. 14(1): p. 111-118. 15. Windmill, J.F.C., et al., Nanomechanical and electrical characterization of a new cellular electret sensor-actuator. Nanotechnology, 2008. 19(3): p. -. 16. Neugschwandtner, G.S., et al., Piezo- and pyroelectricity of a polymer-foam space-charge electret. Journal of Applied Physics, 2001. 89(8): p. 4503-4511. 17. Hu, Z. and H. von Seggern, Air-breakdown charging mechanism of fibrous polytetrafluoroethylene films. Journal of Applied Physics, 2005. 98(1): p. -. 18. Hu, Z. and H. von Seggern, Breakdown-induced polarization buildup in porous fluoropolymer sandwiches: a thermally stable piezoelectret. Journal of Applied Physics, 2006. 99(2): p. -. 19. Chin, I.J., S.C. Lee, and S. Quan, Preparation and characterization of surfactant-induced nanoporous PMMA film. Journal of Industrial and Engineering Chemistry, 2009. 15(1): p. 136-140. 20. Priyanto, S., G.A. Mansoori, and A. Suwono, Measurement of property relationships of nano-structure micelles and coacervates of asphaltene in a pure solvent. Chemical Engineering Science, 2001. 56(24): p. 6933-6939. 21. Yang, S.H. and G.W.M. Lee, Filtration characteristics of a fibrous filter pretreated with anionic surfactants for monodisperse solid aerosols. Journal of Aerosol Science, 2005. 36(4): p. 419-437. 22. Mohmeyer, N., et al., Additives to improve the electret properties of isotactic polypropylene. Polymer, 2007. 48(6): p. 1612-1619. 23. Loudspeaker and headphone handbook. 1997: Butterworth-Heinemann. 24. Bai, M.S.A.R., et al., Experimental modeling and design optimization of push-pull electret loudspeakers. Journal of the Acoustical Society of America, 2010. 127(4): p. 2274-2281. 25. Mellow, T. and L. Karkkainen, On the forces in single-ended and push-pull electret transducers. Journal of the Acoustical Society of America, 2008. 124(3): p. 1497-1504. 26. Sessler, G.M., Electric-Fields and Forces Due to Charged Dielectrics. Journal of Applied Physics, 1972. 43(2): p. 405-&. 27. http://www.techmaxasia.com/articles/detail/1196063383. 28. Batkin, V.I., Ion emission in humid air. Technical Physics, 2008. 53(4): p. 451-454. 29. Jenekhe, S.A. and J.W. Lin, Diffusion and Permeation of Vapors in Composite Polymer Thin-Films. Thin Solid Films, 1983. 105(4): p. 331-342. 30. Pokhodnya, K.I., M. Bonner, and J.S. Miller, Parylene protection coatings for thin film V[TCNE](x) room temperature magnets. Chemistry of Materials, 2004. 16(24): p. 5114-5119. 31. Kim, S.J., et al., Performance improvement of an ionic polymer-metal composite actuator by parylene thin film coating. Smart Materials & Structures, 2006. 15(6): p. 1540-1546. 32. http://nscmems.iam.ntu.edu.tw/. 33. Scollie, S.D., et al., Validity and repeatability of level-independent HL to SPL transforms. Ear and Hearing, 1998. 19(5): p. 407-413. 34. Seewald, R., et al., Predictive validity of a procedure for pediatric hearing instrument fitting. American Journal of Audiology, 1999. 8(2): p. 143. 35. G. vec, J., P. S. Popolo, and I. R. Titze, Measurement of vocal doses in speech: Experimental procedure and signal processing. Logopedics Phonatrics Vocology, 2003. 28(4): p. 181-192. 36. Mun, S. and D. Cho, Noise measuring technique and field evaluation based on the effects of vehicles and pavement types. Canadian Journal of Civil Engineering, 2009. 36(11): p. 1816-1824. 37. http://www.bksv.com/Products/TransducersConditioning/AcousticTransducers/Microphones/4939.aspx?cmd=Accessories. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/45829 | - |
dc.description.abstract | 可撓式揚聲器近年來引起了眾多研究室的興趣,它具有輕薄、節能、可攜式等新的未來的應用範圍,尤其是在新式的平面顯示器紛紛問世之後,更是激發了各界對開發可撓式揚聲器的意願,而確實,已經有許多可撓式的揚聲器被發表出來。
本文對於駐極體材料的探討,將環狀烯烴聚合物(COC, cyclic olefin copolymer)溶液與雙羧基界面活性劑混合後,利用界面活性劑的自組裝機制製作孔洞型環狀烯烴聚合物薄膜;另一方面,使用聚四氟乙烯 (expanded polytetrafluoroethylene, e-PTFE)與COC製作耐高溫的複合駐極體。最後分別討論其材料物理性質、耐溫性與駐電特性。對於溼度相對於駐極體電荷流失,本研究使用聚對二甲基苯(parylene)做為所研製的駐極體之防水保護層,研究顯示具有防止電荷流失的助益。 在揚聲器的結構設計上,是使用蜂巢狀的駐極體揚聲器陣列,並且利用樑的撓曲與板的彎曲理論算出理想的陣列單體尺寸,以達到最佳的效率。而利用計算結果設計出來的平面可撓式駐極體揚聲器陣列的聲場量測結果也呈現在本篇論文中。 | zh_TW |
dc.description.abstract | Flexible loudspeakers have triggered much interest recently due to the rapidly development of various areas, such as e-books and flexible displays. Furthermore, flexible loudspeakers can be flat, lightweight and portable. Indeed, several research results related to the flexible speakers were reported.
In the thesis, cyclic olefin copolymers model 8007 (COC(Topas@8007)) was mixed with double-carboxylic surfactant, the use of surfactant self-assembly mechanism make cyclic olefin copolymers into porous electret film. On the other hand, e-PTFE (expanded polytetrafluoroethylene) and COC were compounded to produce heat-resistant electret. A smart structure had been used to build flexible electret loudspeaker. The structure is similar to honeycomb, but the unit cell is squared instead of hexagonal. This structure could avoid electret membrane touch the electrode when loudspeaker was bending. Furthermore, best size of the unit cell was calculated by modeling electret membrane into beam and plate. In the end of the thesis, the surface potential will be effected by temperature had been observed. Nevertheless, humidity also effected surface potential and it wouldn’t be even less than temperature. The protect layer, parylene, was coating on electret materials to insulate the effect of humidity, and it really achieved good results. | en |
dc.description.provenance | Made available in DSpace on 2021-06-15T04:46:54Z (GMT). No. of bitstreams: 1 ntu-99-R97525047-1.pdf: 5941343 bytes, checksum: b8841e7ddb6f0c0404b12e434966eb21 (MD5) Previous issue date: 2010 | en |
dc.description.tableofcontents | 中文摘要………………………………………………………………iii
英文摘要…………………………………………………………………iv 目錄………………………………………………………………………v 圖目錄…………………………………………………………………vii 表目錄…………………………………………………………………xiii 第一章 緒論……………………………………………………………1 1.1 前言……………………………………………………………… 1 1.2 揚聲器簡介……………………………………………………… 3 1.3 研究動機………………………………………………………… 6 1.4文獻回顧…………………………………………………………7 1.5 論文架構…………………………………………………………11 第二章 駐極體薄膜研發……………………………………………… 13 2.1 駐極體介紹………………………………………………………13 2.2駐極體分類………………………………………………………14 2.3 孔洞駐極體(多層膜) ……………………………………………17 2.4駐極體振膜的材料選擇…………………………………………28 2.5以添加劑提升駐極體駐電性……………………………………36 第三章 可撓式駐極體揚聲器…………………………………………49 3.1靜電揚聲器原理………………………………………………… 49 3.2可撓式駐極體揚聲器……………………………………………55 3.3可適性設計………………………………………………………60 3.4製造與組裝………………………………………………………66 第四章 結果與討論……………………………………………………75 4.1溫度、溼度對駐極體振膜的影響………………………………75 4.2可撓揚聲器結構與聲場量測結果………………………………83 第五章 結論與未來展望………………………………………………87 5.1結論………………………………………………………………87 5.2未來展望…………………………………………………………88 參考文獻…………………………………………………………………89 | |
dc.language.iso | zh-TW | |
dc.title | 可撓式駐極體揚聲器的研製:創新駐極體材料的開發與應用 | zh_TW |
dc.title | Research and Produce of Flexible Electret Loudspeaker: Development and Application of Novel Electret Materials | en |
dc.type | Thesis | |
dc.date.schoolyear | 98-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 吳文中,李世元,王安邦,謝志文 | |
dc.subject.keyword | 駐極體,揚聲器,可撓曲,環狀烯烴聚合物,聚四氟乙烯, | zh_TW |
dc.subject.keyword | electret,loudspeaker,flexible,cyclic olefin copolymer,e-PTFE, | en |
dc.relation.page | 91 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2010-08-05 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 工程科學及海洋工程學研究所 | zh_TW |
顯示於系所單位: | 工程科學及海洋工程學系 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-99-1.pdf 目前未授權公開取用 | 5.8 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。