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アイテム
繊維強化プラスチックのナノフィラーとして効果的な利用に向けたセルロースナノファイバーの表面機能化
https://doi.org/10.18997/00008353
https://doi.org/10.18997/0000835322fc933d-fc34-49db-b781-0c146ed91e6b
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
sei_k_397.pdf (3.4 MB)
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| アイテムタイプ | 学位論文 = Thesis or Dissertation(1) | |||||||
|---|---|---|---|---|---|---|---|---|
| 公開日 | 2021-06-09 | |||||||
| 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 | Surface Functionalization of Cellulose Nanofiber for its Effective Use as Nanofiller in Fiber Reinforced Plastics | |||||||
| 言語 | en | |||||||
| タイトル | ||||||||
| タイトル | 繊維強化プラスチックのナノフィラーとして効果的な利用に向けたセルロースナノファイバーの表面機能化 | |||||||
| 言語 | ja | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| 著者 |
Safarul bin Mustapha
× Safarul bin Mustapha
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| 抄録 | ||||||||
| 内容記述タイプ | Abstract | |||||||
| 内容記述 | Cellulose nanofibre （CNF）, which is produced from lignocelluloses, has been growing exponentially as a low-carbon material because of its relative ease of high specific surface area, high strength and stiffness, lighter in weight and biodegradability. This cellulosic fibre has been studied intensively for fibre reinforced polymer composites as outstanding reinforcing potential instead of glass or carbon fibre. Due to hydrophilicity derived from hydroxyl groups in the structure and inherent tendency to form a strong network held through hydrogen-bonding, CNF is difficult to disperse in almost of the hydrophobic polymer matrix. Therefore, this study focused on surface modification strategies to expand the applications. The present work aimed to investigate the surface modification of CNF by new greener strategies and prepare environmentally friendly next-generation fibre reinforced plastics. The surface modification of CNF was easily performed by optimizing the modification method with acid. Surface modification using an acid treatment such as acetic acid, phosphoric acid, and sulfuric acid successfully converted from the hydroxyl group to the ester group in the CNF, confirmed by FT-IR and SEM-EDS. Moreover, the XRD analysis revealed that this treated CNF was the cellulose type I even after acid treatments. The acid treatment method could improve interface adhesion between CNF and polymer matrix. The dispersibility of CNF in the silicone elastomer as a polymer matrix could not see agglomerated CNF compare to unmodified CNF in the matrix, respectively. The mechanical properties of the silicone composite also improved. Therefore, acid treatments have the potential to be an effective method as a surface modification of CNF. In order to compare the performance of CNF dispersibility in the polymer matrix and mechanical properties, acetyl cellulose as a commercial product was investigated to prepare fibre reinforced plastics with polyurethanes （PUs）. Thermoplastic resin as a polymer matrix for fibre reinforced plastics is major activities in this research field. On the other hand, CNF can be worked as a network agent for thermoset resin such as PUs, polyurea, and epoxy resin. Therefore, acetyl cellulose was adopted due to less hydroxyl group as reactive sites to the isocyanate group in PUs because of suppression of networking. Though some remained hydroxyl groups in acetyl cellulose were reacted with isocyanate group in PUs monomer to make a network, molecular weight of PUs was hardly grown by networking. However, this issue could overcome after modification reaction conditions. These composites showed enhancement of mechanical properties and transparent film after hot-pressed moulding. Mechanical performance of PUs and transparency of moulding film to proof dispersibility of fibre in the PUs matrix was investigated by CNF, and phosphoric acid-treated CNF to compare with the acetyl cellulose PUs. Since agglomeration has occurred through hydrogen bonding between hydroxyl groups in cellulose structure, another material as an intercalator was mixed due to preventing hydrogen bonds between celluloses. Silica/CNF as a filler was successfully prepared using ethanol/water mixed solvents at room temperature without a catalyst. This method prevented the CNF from agglomeration when drying and enhanced the dispersion of CNF in the hydrophobic polymer. Polypropylene （PP） as a polymer matrix was melt blending with silica/CNF filler. It significantly increased the mechanical properties of the composite. In conclusion, this study provided to overcome in greater depth bothersome of CNF to prepare fibre reinforced plastics which can be shown to enhance mechanical performance due to prevent agglomeration of CNF from a hydrophobic matrix. The resulting products and method can expand and contribute to an application to replace existing materials. | |||||||
| 目次 | ||||||||
| 内容記述タイプ | TableOfContents | |||||||
| 内容記述 | 1: Introduction and Literature Review||2: Tailored Higher Performance Silicone Elastomer With Cellulose Nanofibre （CNF） Through Acidic Treatment||3: Enhancing Mechanical Properties of Polyurethane with Cellulose Acetate as Chain Extender||4: Covalent Incorporation of Cellulose Nanofibre （CNF） Into Polyurethane Elastomer and The Effect on Mechanical Properties||5: The Design of Dry CNF Filler by Hybridization with Silica Particle for Moulded Polypropylene Composite||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397号 学位授与年月日：令和3年3月25日 | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | Cellulose nanofiber | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | surface modification | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | polymer composite | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | hybrid filler | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | polyurethane | |||||||
| キーワード | ||||||||
| 主題Scheme | Other | |||||||
| 主題 | acid treatment | |||||||
| アドバイザー | ||||||||
| 安藤, 義人 | ||||||||
| 学位授与番号 | ||||||||
| 学位授与番号 | 甲第397号 | |||||||
| 学位名 | ||||||||
| 学位名 | 博士（工学） | |||||||
| 学位授与年月日 | ||||||||
| 学位授与年月日 | 2021-03-25 | |||||||
| 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 | |||||||
| 学位授与年度 | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 令和2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 | 10.18997/00008353 | |||||||
| ID登録タイプ | JaLC | |||||||
