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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 柯淳涵(Chun-Han Ko) | |
dc.contributor.author | Chen-Yu Tsai | en |
dc.contributor.author | 蔡承諭 | zh_TW |
dc.date.accessioned | 2021-06-17T08:25:31Z | - |
dc.date.available | 2024-08-18 | |
dc.date.copyright | 2019-08-18 | |
dc.date.issued | 2019 | |
dc.date.submitted | 2019-08-12 | |
dc.identifier.citation | Abe K, Iwamoto S, Yano H (2007) Obtaining cellulose nanofibers with a uniform width of 15 nm from wood. Biomacromolecules 8:3276-3278.
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/74233 | - |
dc.description.abstract | 纖維素原料是一種可再生、生物可降解的綠色永續材料。本研究使用微晶纖維素和漂白漿為原料,經過磷酸前處理過後的纖維素原料以N-甲基嗎晽-N氧化物水溶液作為溶劑製成纖維素溶液,然後將纖維素溶液以旋轉塗佈法和夾層法製備出纖維素薄膜。在塗佈的過程中,使用未處理的矽晶片、用粒徑1微米的鑽石砂紙刮磨過的矽晶片以及用鑽石砂紙刮磨後再以3-氨基丙基三乙氧基矽烷進行矽烷化處理的矽晶片作為基板。研究結果顯示,已經成功地發展出製備具有優選取向的纖維素薄膜的方法。原物料、塗佈方式、基板處理會影響薄膜中奈米結晶纖維素的排列。其中以Avicel為原料,以夾層法塗佈並搭配用鑽石砂紙刮磨過的矽晶片為基板所製備出的纖維素薄膜具有最佳的方向性。其厚度為6.92 ± 0.37 μm,粗糙度為30.01 nm,具有明顯的層狀結構。在低掠角繞射的結果中,在2θ為10.50°處出現具有方向性的訊號。偏光顯微鏡圖中,5CB (4-cyano-4'-pentylbiphenyl) 液晶分子整齊地朝著刮磨方向排列。 | zh_TW |
dc.description.abstract | Cellulosic feedstocks are renewable, biodegradable and eco-friendly materials. In this study, cellulosic feedstocks including Avicel and bleached eucalyptus kraft pulps which are pretreated by phosphoric acid are dissolved with N-methylmorpholine-N-oxide (NMMO) to prepare cellulose solution. Cellulose solution is coated as a cellulose film by spin coating and sandwich method. During the coating process, untreated silica wafer, silica wafer which is scratched by diamond sandpaper with 1μm particle size and silica wafer which is scratched by diamond sandpaper plus silanized with (3-aminopropyl)triethoxysilane (APTES) are used as substrates. The experimental results indicate that preparation methods of cellulose film with preferred orientation is successfully developed. Cellulosic feedstocks, coating methods and substrate treatment have influence on arrangement of cellulose nanocrystals in cellulose film. Well aligned cellulose film can be obtained from Avicel by sandwich method with scratching substrate treatment. Thickness of this cellulose film is 6.92 ± 0.37 μm, roughness is 30.01 nm and there is pseudolayered helical structure. The result of grazing incidence X-ray diffraction (GIXD) shows that the directional signal is at 2θ = 10.50°. In polarizing optical microscope (POM) image, liquid crystals, 4-cyano-4'-pentylbiphenyl molecules (5CBs) are well aligned on the cellulose film surface. | en |
dc.description.provenance | Made available in DSpace on 2021-06-17T08:25:31Z (GMT). No. of bitstreams: 1 ntu-108-R06625003-1.pdf: 5207683 bytes, checksum: 13406f3475dd6d006620bcbf06844bd2 (MD5) Previous issue date: 2019 | en |
dc.description.tableofcontents | 謝誌 I
摘要 II Abstract III Figure index VII Table index IX List of abbreviation X Chapter 1 Introduction 1 Chapter 2 Literature review 4 2.1 Cellulose 4 2.1.1 Structure and properties 4 2.1.2 Cellulose nanomaterials 7 2.1.3 Self-assembly 9 2.2 Cellulosic feedstocks pretreated with phosphoric acid 12 2.3 Dissolution of cellulose with NMMO 14 2.4 Diamond sandpaper scratching 16 2.5 Silanization with APTES 19 2.6 Cellulose films apply to liquid-crystal displays 20 2.6.1 Liquid crystals 20 2.6.2 Liquid crystal displays 21 Chapter 3 Materials and methodologies 24 3.1 Research framework 24 3.2 Materials 25 3.2.1 Cellulosic feedstocks 25 3.2.2 Substrates 26 3.2.3 Solvents 28 3.2.4 Liquid crystals 28 3.3 Methodologies 29 3.3.1 Pretreatment of cellulosic feedstock 29 3.3.2 Preparation of cellulose solution 29 3.3.3 Spin coating method 30 3.3.4 Sandwich method 30 3.3.5 Silica wafer scratching 31 3.3.6 Silica wafer silanization 32 3.3.7 Profilometer 33 3.3.8 Scanning electron microscope (SEM) 33 3.3.9 Atomic force microscope (AFM) 34 3.3.10 Grazing incidence X-ray diffraction (GIXD) 34 3.3.11 Polarizing optical microscope (POM) 35 Chapter 4 Results and discussion 36 4.1 Thickness 36 4.1.1 Effect of cellulosic feedstocks 37 4.1.2 Effect of coating methods 38 4.1.3 Effect of substrate treatments 39 4.2 Scanning electron microscope (SEM) 41 4.2.1 Effect of cellulosic feedstocks 41 4.2.2 Effect of coating methods 42 4.2.3 Effect of substrate treatments 43 4.3 Atomic force microscope (AFM) 47 4.3.1 Effect of cellulosic feedstocks 48 4.3.2 Effect of coating methods 50 4.3.3 Effect of substrate treatments 52 4.4 Grazing incidence X-ray diffraction (GIXD) 55 4.4.1 Effect of cellulosic feedstocks 58 4.4.2 Effect of coating methods 62 4.4.3 Effect of substrate treatments 63 4.5 Polarizing optical microscope (POM) 68 4.5.1 Effect of cellulosic feedstocks 68 4.5.2 Effect of coating methods 70 4.5.3 Effect of substrate treatments 71 Chapter 5 Conclusions 74 Chapter 6 References 76 | |
dc.language.iso | en | |
dc.title | 基板處理與塗佈方式對纖維素薄膜表面性質之影響 | zh_TW |
dc.title | Influence of Substrate Treatments and Coating Methods on Surface Characteristics of Cellulose Films | en |
dc.type | Thesis | |
dc.date.schoolyear | 107-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 徐秀福(Hsiu-Fu Hsu),鄭建中(Chien-Chung Cheng),王彩惠(Tsai-Hui Wang) | |
dc.subject.keyword | 纖維素薄膜,優選取向,夾層法,刮磨處理,矽烷化,低掠角繞射, | zh_TW |
dc.subject.keyword | cellulose film,preferred orientation,sandwich method,scratching treatment,silanization,grazing incidence X-ray diffraction, | en |
dc.relation.page | 82 | |
dc.identifier.doi | 10.6342/NTU201901557 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2019-08-13 | |
dc.contributor.author-college | 生物資源暨農學院 | zh_TW |
dc.contributor.author-dept | 森林環境暨資源學研究所 | zh_TW |
顯示於系所單位: | 森林環境暨資源學系 |
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