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持続可能な高分子材料の開発に向けた化学的・物理的改質によるセルロースの物性制御
https://doi.org/10.18997/0002000457
https://doi.org/10.18997/000200045715558f32-1bde-4c56-bc1f-a52d4dc60ac5
| 名前 / ファイル | ライセンス | アクション |
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sei_k_459.pdf (5 MB)
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| アイテムタイプ | 学位論文 = Thesis or Dissertation(1) | |||||||||
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| 公開日 | 2024-04-01 | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_db06 | |||||||||
| 資源タイプ | doctoral thesis | |||||||||
| タイトル | ||||||||||
| タイトル | Controlling the Properties of Cellulose by Chemical and Physical Modifications for the Development of Sustainable Polymeric Materials | |||||||||
| 言語 | en | |||||||||
| タイトル | ||||||||||
| タイトル | 持続可能な高分子材料の開発に向けた化学的・物理的改質によるセルロースの物性制御 | |||||||||
| 言語 | ja | |||||||||
| 言語 | ||||||||||
| 言語 | eng | |||||||||
| 著者 |
川野, 哲聖
× 川野, 哲聖
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| 抄録 | ||||||||||
| 内容記述タイプ | Abstract | |||||||||
| 内容記述 | Polymeric materials have played an irreplaceable role in the manufacturing industry and our daily life. However, the current industrial production of polymeric materials heavily depends on petroleum chemicals. As a result, there are now widespread concerns about environmental issues and the depletion of fossil resources. To overcome such global challenges, polymers derived from natural resources have been drawing growing attention. In that sense, polymeric materials derived from cellulose, the major component of lignocellulosic biomass including agricultural residues and the most abundant natural polysaccharide, are undoubtedly vital for the future of the polymeric industry. However, there are several shortcomings of cellulose as the raw material for the preparation of polymeric materials due to the extended hydrogen bonding network and hydrophilic nature. It is essential to address the drawbacks by controlling the properties of cellulose and lignocellulosic biomass for the development of cellulose-based sustainable polymeric materials and expanding their applications. Thus, the present study aims to control the properties of lignocellulosic biomass and cellulose-based materials through chemical and physical modification methods. In Chapter 1, the fundamentals of lignocellulosic biomass, cellulose, and nanocellulose are explored. Besides, the recent studies on preparation and modification methods for cellulose-based polymeric materials, including biocomposite, regenerated cellulose (RC) film, and cellulose derivatives, are also discussed. In Chapter 2, biocomposites were fabricated by the incorporation of hybrid filler composed of olive pomace (OP), which is lignocellulosic biomass derived from the agro-industrial residue, and marble powder waste. To improve the performance of OP as a reinforcement, the fibrillation processes were carried out through the combination of ionic liquid and mechanical kneading. One of the challenges of such biocomposites intended to make effective use of wastes or by-products is to achieve both high contents and improved mechanical properties. Thus, in this work, the compounding ratio of filler and additive was optimized by response surface methodology. The hydrophilicity of cellulose limits its application as a polymeric material. Chapter 3 deals with controlling the surface wettability of RC films by plasma-surface modification. The hydrophilic surface of RC film was converted into hydrophobic with CF4 plasma treatments for 1 min without using any solvents. In contrast, treatment with O2 or N2 plasmas enhanced the hydrophilicity of RC film due to the surface etching. The effects of each plasma treatment on the chemical composition and morphology were also investigated. In Chapter 4, a thermoformable cellulose-based bioplastic was synthesized through the esterification of cellulose using natural solid soap containing structurally diverse fatty acids. The effective use of natural soap is highly required in soap manufacturing industries from the viewpoint of waste management. The synthesized cellulose esters were readily formed into a film by thermal processing. Furthermore, the mechanical properties of the obtained cellulose esters were compared to those of long-chain cellulose ester derivatives with different chain lengths and structures of side chains. Chapter 5 addresses preventing the agglomeration of CNF in their dry state through a simple kneading process with an anionic surfactant. Due to the intensive hydrogen bonds, CNF easily agglomerates and does not disperse even in water once dried. In contrast, the prepared CNF powder showed better water-dispersion performance depending on the preparation conditions. The mechanism of agglomeration suppression and the ability of CNF powder as a reinforcement for the polymer composite are also discussed. Finally, Chapter 6 attempts to conclude with the key findings from each chapter. Moreover, several recommendations for future research are proposed. This dissertation will provide an overview of the green yet effective modification methods to control the properties of cellulose-based materials, which is useful for the further development of sustainable polymeric materials as an alternative to petroleum-based polymers in various applications. | |||||||||
| 目次 | ||||||||||
| 内容記述タイプ | TableOfContents | |||||||||
| 内容記述 | 1. Introduction and Literature Review||2. Designing Approach of Biocomposite by Combination of Fibrillated Olive Pomace and Marble Powder||3. Surface Modification of Regenerated Cellulose Film Using Low-Pressure Plasma Treatment with Various Reactive Gases||4. Synthesis and Mechanical Properties of Cellulose-Based Bioplastic with Mixed Fatty Acid Side Chains||5. Redispersion Characteristics and Reinforcing Behavior of Powdered Cellulose Nanofiber Prepared Using Anionic Surfactant||6. Conclusion and Recommendations | |||||||||
| 備考 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 九州工業大学博士学位論文 学位記番号: 生工博甲第459号 学位授与年月日: 令和5年3月24日 | |||||||||
| 学位授与番号 | ||||||||||
| 学位授与番号 | 甲第459号 | |||||||||
| 学位名 | ||||||||||
| 学位名 | 博士（学術） | |||||||||
| 学位授与年月日 | ||||||||||
| 学位授与年月日 | 2023-03-24 | |||||||||
| 学位授与機関 | ||||||||||
| 学位授与機関識別子Scheme | kakenhi | |||||||||
| 学位授与機関識別子 | 17104 | |||||||||
| 学位授与機関名 | 九州工業大学 | |||||||||
| 言語 | ja | |||||||||
| 学位授与年度 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 令和4年度 | |||||||||
| 出版タイプ | ||||||||||
| 出版タイプ | VoR | |||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||
| アクセス権 | ||||||||||
| アクセス権 | open access | |||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||
| ID登録 | ||||||||||
| ID登録 | 10.18997/0002000457 | |||||||||
| ID登録タイプ | JaLC | |||||||||
