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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 柯淳涵 | |
dc.contributor.author | Chien-Ying Yang | en |
dc.contributor.author | 楊千瑩 | zh_TW |
dc.date.accessioned | 2021-06-17T00:29:29Z | - |
dc.date.available | 2022-12-31 | |
dc.date.copyright | 2012-03-19 | |
dc.date.issued | 2011 | |
dc.date.submitted | 2012-02-13 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/66303 | - |
dc.description.abstract | 本論文主要著重於纖維酵素酶在磨漿的運用,包含對纖維的機械性質以及紙張物理性質的影響。近年來,酵素的利用已成為一項熱門的生物科技,也有越來越多的學者證實其潛力。磨漿為紙匹成型之不可或缺的過程,其對纖維素纖維進行機械性地處裡,改變纖維的表面形態與結構,形成所需的纖維特性,進而產生品質優良的紙匹。
然而,磨漿在製漿造紙工業為一相當耗能的過程,因此,本研究將探討纖維素酶在造紙過程,對於磨漿階段節約能源的效用。轉殖的Paenibacillus纖維素酶在本研究中用來提升兩種紙漿的磨漿效率,並搭配不同的酵素添加量與不同的PFI轉數。兩種紙漿分別為商用漂白的尤加利牛皮紙漿(Eucalyptus globulus kraft pulp)與英屬哥倫比亞海岸的花旗松牛皮紙漿(Pseudotsuga menziesii kraft pulp)。 試驗結果顯示,經過酵素前處理纖維的兩種紙漿,在磨漿後均具有較好的濾水性,且到達相同游離度時,所需要的磨漿轉數較少。雖然兩種紙漿的黏度因酵素的前處理而降低,但在紙張的各項物理性質經統計結果顯示並無重大的不良影響。除此之外,更以電子掃描顯微鏡來觀察纖維形態與表面結構的變化,僅添加纖維素酶而未磨漿的纖維表面並無明顯變化,但有比未經纖維素酶處理的纖維更為膨潤。而添加纖維素酶且經過磨漿處理的纖維表面,則比未添加酵維素酶的纖維有較好的帚化效果。最後,利用原子力學顯微鏡來分析纖維表面粗糙度之變化。統計結果顯示,兩種紙漿纖維在低劑量的纖維素酶前處理並搭配磨漿後,有較高的表面粗糙度。 | zh_TW |
dc.description.abstract | This study aimed at the progress of application of cellulase in refining, including mechanism of action on cellulose and their effects on physical properties on paper. Utilization of enzymes becomes a popular biotechnology, and there are more and more researches confirm their potential. Refining is a necessary process to form the paper where the cellulosic fibers are mechanically treated, resulting into morphological and structural changes to produce desired fiber properties for a better quality paper.
However, refining is energy-cost stage in pulp and paper industry. For this reason, the effect of cellulase was evaluated for energy saving in refining process of papermaking. The recombinant Paenibacillus cellulase was used to improve the efficiency of the refining process of two pulps, using different enzyme dosages and different PFI revolutions. The pulps used in this work were the commercial bleached Eucalyptus globulus kraft pulp and Pseudotsuga menziesii kraft pulp. This treatment increased drainability of both pulps at the same level of refining energy. In other words, that consumed less refining revolutions to reach the same drainability compared to the untreated pulps. Although the viscosity of both pulps were degrade with the enzymatic treatment, the physical properties of paper had no significant negatively influence on them. Moreover, the samples were observed by Scanning electron microscopy (SEM), and analyzed the roughness and height of fiber by Atomic force microscopy (AFM). The results showed the treatment with cellulase swelled the fibers in the absence of refining, and there were better fibrillation on the fibers treated with cellulase after refining. Furthermore, the statistical analysis of AFM suggested the both pulps treated with low cellulase dosage with PFI refining had higher roughness. | en |
dc.description.provenance | Made available in DSpace on 2021-06-17T00:29:29Z (GMT). No. of bitstreams: 1 ntu-100-R98625044-1.pdf: 2215521 bytes, checksum: 756c4538487372eabb94d3da2224af37 (MD5) Previous issue date: 2011 | en |
dc.description.tableofcontents | CONTENTS
誌謝 i 摘要 ii Abstract iii CONTENTS v List of figures viii List of tables xiv I. Introduction 1 II. Literature reviews 5 2.1 Utilization of enzymes 5 2.1.1 Enzymatic treatment to improve the refining of a bleached Eucalyptus globules kraft pulp 5 2.1.2 Effect of drainability and paper properties of two commercial pulps treated enzymes 7 3.1 Utilization of Atomic Force Microscopy 8 III. Objectives 11 IV. Materials and methods 12 4.1 Materials 12 4.1.1 Pulps 12 4.1.2 Enzyme 12 4.2 Experimental methods 12 4.2.1 Enzymatic pretreatment 12 4.2.2 Pulp characterization 13 4.3 Pulp Analysis 13 4. 3.1 Pulp morphology analysis 13 4.3.2 Intrinsic viscosity 14 4.3.3 Released reducing Sugar 14 4.3.4 Scanning electron microscopy 15 4.3.5 Atomic force microscopy 15 V. Results and Discussion 16 5.1 Enzyme actions and effect of enzymatic treatment on refining 16 5.1.1 Intrinsic viscosity 16 5.1.2 Changes of fiber length 18 5.1.3 Changes of fiber width 23 5.1.4 Changes of freeness 27 5.2 Effect of enzymatic treatment on the pulp properties 29 5.3 Effect of enzymatic treatment on fiber surface 37 5.3.1 Modification of fiber surfaces analyzed by scanning electron microscopy (SEM) 37 5.3.2 Modification of fiber surfaces analyzed by atomic force microscopy (AFM) 47 VI. Conclusions 63 VII. References 65 | |
dc.language.iso | en | |
dc.title | 轉殖小枯草桿菌纖維素酶前處理纖維對磨漿特性的影響 | zh_TW |
dc.title | Impacts of Recombinant Paenibacillus Cellulase Pretreatment on Pulp Refining Characteristics | en |
dc.type | Thesis | |
dc.date.schoolyear | 100-1 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 張上鎮,施增廉 | |
dc.subject.keyword | 紙漿,酵素,磨漿,紙力性質,濾水性,PFI磨漿機,電子掃描顯微鏡,原子力學掃描顯微鏡, | zh_TW |
dc.subject.keyword | pulp,enzyme,refining,paper property,drainability,PFI,SEM,AFM, | en |
dc.relation.page | 69 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2012-02-14 | |
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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