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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 柯淳涵(Chun-Han Ko) | |
| dc.contributor.author | Jui-Tzu Wang | en |
| dc.contributor.author | 王瑞慈 | zh_TW |
| dc.date.accessioned | 2021-06-08T04:00:15Z | - |
| dc.date.copyright | 2018-08-09 | |
| dc.date.issued | 2018 | |
| dc.date.submitted | 2018-08-09 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/22058 | - |
| dc.description.abstract | 纖維素是由D-葡萄糖以β-1,4-糖苷鍵組成，具有生物可降解、可再生等性質，可由植物細胞壁與細菌代謝產物取得，因纖維素具有氫鍵形成結晶區與非結晶區，而不溶於水與大多數的溶劑。本實驗分為兩大部分，第一部分為以漂白漿、結晶纖維素與細菌纖維素進行磷酸處理降低纖維素結晶度，並加入聚電解質後將纖維素溶於具有環境友善且高回收率的N-甲基嗎晽-N的氧化物水溶液(NMMO)中，製造出再生纖維素薄膜；第二部分為改變細菌纖維素生長基板、培養環境與模式，以光學顯微鏡、掃描式電子顯微鏡、原子力顯微鏡與統計分析方法檢測纖維素薄膜的特性。
實驗結果顯示，經過磷酸處理的纖維素，因其分子量較小其所製成的再生纖維素薄膜表面粗糙度下降，且觀察不到粗纖維束，而加入較高濃度的聚電解質可以幫助纖維素溶於NMMO溶液，使再生纖維素薄膜粗糙度下降，不同電性的聚電解質不影響再生纖維素薄膜表面粗糙度。不同基板、傾斜角度、培養方式所生產出的細菌纖維素薄膜其表面粗糙度並沒有顯著差異，但較接近基板的纖維素排列方向會與流動方向較為平行。經過前處理所生產出的薄膜表面平整且均一，不再具有粗纖維，未來具有應用在不同領域的潛力。 | zh_TW |
| dc.description.abstract | The objective of this experiment is to obtain the eco-friendly and well-aligned cellulose film. The experiment divide into two parts. First, we use three materials (BEK, Avicel and bacterial cellulose) treated with pretreatment and use N-methylmorpholine-N-oxide (NMMO) to produce regenerated cellulose films. Second, bacterial cellulose is cultivated on different condition. We use statistic method, POM, SEM, profilometer, and AFM to determine the morphology of cellulose films and use GPC and DP to determine the properties of cellulose.
The pretreatment used in this research is phosphorylation and polyelectrolytes. Phosphorylation and polyelectrolytes help cellulose dissolve in NMMO which decrease the roughness of thin films.Bacterial cellulose is cultivated in different condition, such as substrate, tilt height and condition mode. The result shows that tilt height,substrate and condition mode can't influence the roughness of bacterial cellulose. However, the alignment of bacterial cellulose can be influenced by fluid direction. Pretreatment can obtain well-aligned cellulose film which can be applied in many different field. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-08T04:00:15Z (GMT). No. of bitstreams: 1 ntu-107-R05625008-1.pdf: 5617902 bytes, checksum: 337823a9ed2b430adc75d2393c2e6f64 (MD5) Previous issue date: 2018 | en |
| dc.description.tableofcontents | 謝誌 I
摘要 II Abstract III List of abbreviation IV Contents V Figure Index IX Table Index X Chapter 1 Introduction 1 Chapter 2 Literature Review 4 2.1 Cellulose 4 2.1.1 Plant cellulose 4 2.1.2 Bacterial cellulose 6 2.2 Phosphorylated cellulose 11 2.3 Polyelectrolytes 14 2.4 Ionic liquid 16 2.4.1 Characteristics 16 2.4.2 NMMO 17 2.5 Regenerated cellulose-NMMO films 20 2.5.1 Mechanism of cellulose dissolution in NMMO 20 2.5.2 Techniques for manufacturing regenerated cellulose films 21 2.5.3 Properties of regenerated cellulose films 22 2.6 Cellulose films apply to liquid crystals displays 24 2.6.1 Liquid crystals 24 2.6.2 Liquid crystal displays 26 Chapter 3 Materials and Methods 28 3.1 Research framework 28 3.2 Materials 29 3.2.1 Cellulose feedstock 29 3.2.2 Substrate 30 3.2.3 Solvents 30 3.2.4 Liquid crystals 31 3.3 Methods 32 3.3.1 Cultivation of bacterial cellulose 32 3.3.2 The yield and conversion rate of bacterial cellulose 32 3.3.3 Chemical composition 33 3.3.4 Phosphorylation of cellulose 33 3.3.5 Addition of Polyelectrolytes 33 3.3.6 Preparation of regenerated cellulose films 34 3.3.7 Effect of BC cultivation conditions on fiber directionality 34 3.3.8 Polarizing optical microscope (POM) 37 3.3.9 Profilometer 37 3.3.10 Scanning electron microscope (SEM) 38 3.3.11 Atomic force microscope (AFM) 38 3.3.12 Degree of polymerization (DP) 39 3.3.13 GPC 40 3.3.14 Statistical analysis method 40 Chapter 4 Result and Discussion 41 4.1 Bacterial cellulose production yield 41 4.2 The properties of materials 43 4.3 Effect of phosphorylation on regenerated cellulose films 45 4.4 Effect of polyelectrolytes on regenerated cellulose films 51 4.4.1 Effect of polyelectrolytes concentration 51 4.4.2 Effect of polyelectrolytes electrical property 57 4.5 Effect of cultivation condition on bacterial cellulose films 63 4.5.1 Substrates conditions 65 4.5.2 Fluid angle conditions 74 4.5.3 Cultivation conditions 76 Chapter 5 Conclusion 77 Chapter 6 References 79 Appendix 82 | |
| dc.language.iso | en | |
| dc.title | 原物料前處理對纖維素薄膜特性之影響 | zh_TW |
| dc.title | Impact of Feedstock Pretreatment on Characteristic of Cellulose Films | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 106-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 徐秀福(Hsiu-Fu Hsu),鄭建中(Chien-Chung Cheng) | |
| dc.subject.keyword | N-甲基嗎?-N-氧化物(NMMO),細菌纖維素,再生纖維素薄膜,纖維束,方向性,磷酸處理,聚電解質, | zh_TW |
| dc.subject.keyword | N-methylmorpholine-N-oxide (NMMO),Bacterial cellulose,Regenerated cellulose film,Fiber bundles,Orientation,Phosphorylation,Polyelectrolytes, | en |
| dc.relation.page | 86 | |
| dc.identifier.doi | 10.6342/NTU201802856 | |
| dc.rights.note | 未授權 | |
| dc.date.accepted | 2018-08-09 | |
| 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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