Development of multi-functional green composites with unique internal microstructure

• Project/Area Number: 25289243
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Composite materials/Surface and interface engineering
• Research Institution: The University of Tokushima
• Principal Investigator: Takagi Hitoshi 徳島大学, ソシオテクノサイエンス研究部, 教授 (20171423)
• Co-Investigator(Kenkyū-buntansha): Nakagaito Antonio Norio 徳島大学, 大学院ソシオテクノサイエンス研究部, 准教授 (50523156)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000); Fiscal Year 2015: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2014: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000); Fiscal Year 2013: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
• Keywords: 天然繊維 / 複合材料 / ルーメン

Outline of Final Research Achievements

We examined changes in microstructure and tensile properties of abaca fibers. The lumen size became smaller after 10 and 15wt% NaOH treatment. Nonlinear stress-strain behavior was observed in the alkali-treated abaca fibers. Young’s modulus was found to decrease after alkali treatment with 10-15wt%NaOH.
We also made polylactic acid-base green composites reinforced with short abaca fiber, and evaluated their thermal property. It was found that the thermal conductivity of randomly-oriented short fiber composites also showed a similar dependence on the lumen size in the fiber as that of unidirectional composites.

Research Products

• [Journal Article] グリーンコンポジットの開発とその特性評価 (2015)
  • Author(s): 高木 均
  • Journal Title: 機械の研究 Volume: 67 Pages: 731-737
  • NAID: 40020570915
  • Acknowledgement Compliant
• [Journal Article] Influence of alkali treatment on internal microstructure and tensile properties of abaca fibers (2015)
  • Author(s): Ming Cai, Hitoshi Takagi, Antonio Norio Nakagaito, Masahiro Katoh, Tomoyuki Ueki, Geoffrey I.N. Waterhouse, Yan Li
  • Journal Title: Industrial Crops and Products Volume: 65 Pages: 27-35
  • DOI: 10.1016/j.indcrop.2014.11.048
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Influence of alkali concentration on morphology and tensile properties of abaca fibers (2015)
  • Author(s): Ming Cai, Hitoshi Takagi, Antonio Norio Nakagaito, Kazuya Kusaka, Masahiro Katoh, Yan Li
  • Journal Title: Advanced Materials Research Volume: 1110 Pages: 302-305
  • DOI: 10.4028/www.scientific.net/amr.1110.302
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Heat transfer analyses of natural fibre composites (2014)
  • Author(s): Hitoshi Takagi, Antonio Norio Nakagaito, Ke Liu
  • Journal Title: WIT Transactions on the Built Environment Volume: 137 Pages: 237-243
  • DOI: 10.2495/hpsm140211
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Anisotropic thermal conductivity of unidirectional natural abaca fiber composites as a function of lumen and cell wall structure (2014)
  • Author(s): Ke Liu, Zhimao Yang and Hitoshi Takagi
  • Journal Title: Composite Structures Volume: 108 Pages: 418-421
  • DOI: 10.1016/j.compstruct.2013.10.036
  • Peer Reviewed
• [Journal Article] Enhanced functional properties of natural fiber-reinforced composites (2014)
  • Author(s): Hitoshi Takagi, Ke Liu, Antonio N. Nakagaito and Zhimao Yang
  • Journal Title: Advanced Materials Research Volume: 845 Pages: 306-310
  • DOI: 10.4028/www.scientific.net/amr.845.306
  • Peer Reviewed
• [Presentation] Degradation behavior of starch-based biodegradable composites (2015)
  • Author(s): Hitoshi Takagi
  • Organizer: 6th International Conference on Mechanics of Biomaterials and Tissues
  • Place of Presentation: Waikoloa Beach Marriott Resort and Spa, Waikoloa (U.S.A.)
  • Year and Date: 2015-12-08
  • Int'l Joint Research
• [Presentation] 植物由来コンポジットの開発と機能性評価 (2015)
  • Author(s): 高木 均
  • Organizer: 第45回木材の化学加工研究会シンポジウム
  • Place of Presentation: 福山商工会議所本所（広島県・福山市）
  • Year and Date: 2015-10-22
  • Invited
• [Presentation] 天然繊維強化複合材料の機能性 (2015)
  • Author(s): 高木 均, 上野 善貴, ナカガイト ノリオ アントニオ
  • Organizer: 日本機械学会2015年年次大会
  • Place of Presentation: 北海道大学（北海道・札幌市）
  • Year and Date: 2015-09-14
• [Presentation] Multi-functional properties in natural fiber reinforced composites (2015)
  • Author(s): Hitoshi Takagi, Antonio Norio Nakagaito, and Ke Liu
  • Organizer: 20th International Conference on Composite Materials
  • Place of Presentation: Bella Center, Copenhagen (Denmark)
  • Year and Date: 2015-07-24
  • Int'l Joint Research
• [Presentation] Damping performance of bamboo fibre-reinforced green composites (2015)
  • Author(s): Hitoshi Takagi, Hiroshi Mori, and Masanori Nakaoka
  • Organizer: 7th International Conference on Computational Methods and Experiments in Materials Characterisation
  • Place of Presentation: TRYP Valencia Oceanic Hotel , Valencia (Spain)
  • Year and Date: 2015-04-23
  • Int'l Joint Research
• [Presentation] ルーメンの有無によるPLA-マニラ麻コンポジットの機械的特性の変化 (2015)
  • Author(s): 國井 博之, 高木 均, ナカガイト ノリオ アントニオ
  • Organizer: 第13回日本材料学会四国支部学術講演会
  • Place of Presentation: 香川大学（香川県・高松市）
  • Year and Date: 2015-04-11
• [Presentation] Natural fiber composites with low thermal conductivity (2014)
  • Author(s): Hitoshi Takagi, Antonio Norio Nakagaito, Ke Liu
  • Organizer: 8th Australasian Congress on Applied Mechanics
  • Place of Presentation: Melbourne Convention and Exhibition Centre(メルボルン市，オーストラリア)
  • Year and Date: 2014-11-26
• [Presentation] Effect of microstructure on multifunctional properties of natural fiber composites (2014)
  • Author(s): Hitoshi Takagi, Antonio Norio Nakagaito, Ke Liu
  • Organizer: 13th International Symposium on Multiscale, Multifunctional and Functionally Graded Materials
  • Place of Presentation: Taua Resort(サンパウロ市，ブラジル)
  • Year and Date: 2014-10-21
• [Presentation] Microstructure and tensile properties of alkali-treated abaca fibers (2014)
  • Author(s): Ming Cai, Hitoshi Takagi, Antonio Norio Nakagaito, Yang Li
  • Organizer: 9th Asian-Australasian Conference on Composite Materials
  • Place of Presentation: Worldhotel Grand Dushulake Suzhou(蘇州市，中国)
  • Year and Date: 2014-10-16
• [Presentation] Heat transfer analyses of natural fibre composites (2014)
  • Author(s): Hitoshi Takagi, Antonio Norio Nakagaito, Ke Liu
  • Organizer: 2014 International Conference on High Performance and Optimum Design of Structures and Materials
  • Place of Presentation: Andromeda Hotel & Thalassa(オステンド市，ベルギー)
  • Year and Date: 2014-06-10
  • Invited
• [Presentation] Inherent thermal barrier property of green composites (2013)
  • Author(s): Hitoshi Takagi
  • Organizer: 9th International Conference on Fracture and Strength of Solids
  • Place of Presentation: ラマダ ホテル(済州島，大韓民国)
  • Invited
• [Presentation] Thermal barrier performance of green composites (2013)
  • Author(s): Hitoshi Takagi, Ke Liu and Antonio Norio Nakagaito
  • Organizer: 9th Japan-Korea Joint Symposium on Composite Materials
  • Place of Presentation: 鹿児島大学（鹿児島）
• [Presentation] Thermal and biodegradable issues of multifunctional green composites (2013)
  • Author(s): Hitoshi Takagi, Ke Liu, Antonio Norio Nakagaito and Zhimao Yang
  • Organizer: SAMPE CHINA 2013
  • Place of Presentation: Shanghai Everbright Convention & Exhibition Center(上海，中華人民共和国)
• [Presentation] Innovation of multifunctional biofibre composites (2013)
  • Author(s): Hitoshi Takagi, Antonio N. Nakagaito, and Ke Liu
  • Organizer: 2nd International Conference on Kenak and Allied Fibres
  • Place of Presentation: Hotel Equatorial Bangi-Putrajaya(マレーシア)
  • Invited
• [Presentation] Enhanced functional properties of natural fiber-reinforced composites (2013)
  • Author(s): Hitoshi Takagi, Ke Liu, Antonio N. Nakagaito and Zhimao Yang
  • Organizer: 1st InternationalMaterials, Industrial, and Manufacturing Engineering Conference
  • Place of Presentation: Puteri Pacific Hotel Johor Bahru(マレーシア)
  • Invited
• [Presentation] Effects of alkali treatment on microstructure and tensile properties of abaca fiber (2013)
  • Author(s): Ming Cai, Hitoshi Takagi, Antonio Norio Nakagaito, Kazuya Kusaka, Masahiro Katoh and Yan Li
  • Organizer: SAMPE CHINA 2013
  • Place of Presentation: Shanghai Everbright Convention & Exhibition Center(上海，中華人民共和国)