Details of a Researcher - Shibata Shinichi

Shibata Shinichi

写真a

Title	Professor
Researcher Number(JSPS Kakenhi)	70274884

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Current Affiliation Organization 【 display / non-display 】

Duty University of the Ryukyus Faculty of Engineering School of Engineering_Mechanical Engineering Program Professor
Concurrently University of the Ryukyus Graduate School of Engineering and Science Solid Mechanics and Materials Engineering Professor

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Academic degree 【 display / non-display 】

Niigata University - Doctor (Engineering)

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External Career 【 display / non-display 】

2006.08

　

　

University of the Ryukyus, Faculty of Engineering, Department of Mechanical Systems Engineering, Engineering Materials,Design and Processing, Associate Professor

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Research Interests 【 display / non-display 】

Injection Molding,Polymer Engineering,Composite Material

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Research Areas 【 display / non-display 】

Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Transport phenomena and unit operations
Nanotechnology/Materials / Material processing and microstructure control

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Research Theme 【 display / non-display 】

Polymerization of Poly Lactic Acid by Direct Polycondensation
Polymerization of poly lactic acid by ROP

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Published Papers 【 display / non-display 】

Effect of processing temperature and polymer types on mechanical properties of bamboo fiber composites

Takumi Takeuchi, Panuwat Luengroajnaku, Hiroshi Ito, Sarawut Rimdusit, Shinichi Shibata

Bioresources 19 ( 1 ) 41 - 52 2023.11 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)
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  DOI
Exploring the Prospects of Macadamia Nutshells for Bio-Synthetic Polymer Composites: A Review

Md Sefat Kahn, Md Mainul Islam, Jayantha Epaarachchi, Shinichi Shibata

Polymers 15 ( 19 ) 4007 - 4021 2023.10 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)
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  DOI
Investigating the Characteristics of a Natural Fiber Composite Fabrication from 9,9′-Bis(aryl)fluorene-modified Nanocellulose Bamboo Fiber

Khan Md Sefat, Takashi Kurose, Masahiro Yamada, Hiroshi Ito, Shinichi Shibata

Bioresources 17 ( 3 ) 4559 - 4567 2022.06 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)
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  DOI
Fabrication of 9,9′-Bis(aryl)fluorene-modified Nanocellulose Bamboo Fiber Composite

Khan Md Sefat, Takashi Kurose, Masahiro Yamada, Hiroshi Ito, Shinichi Shibata

Bioresources 16 ( 2 ) 3907 - 3915 2021.04 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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In this study, a green composite was fabricated using bamboo fiber and 9,9′-bis(aryl)fluorene-modified cellulose nanofiber (FCNF). Cellulose nanofiber (CNF) and finely crushed bamboo fiber (CBF) were also used as binders. The mechanical properties of the composites were compared. The results showed that the FCNF-bamboo fiber composite had the maximum flexural strength among these binders. This result was likely due to strong bonding by chemical reactions among fibers and the FCNF. The effect of fiber orientation accuracy on the mechanical properties of the composites was also investigated. When the bamboo fibers were carefully aligned, without fibers crossing each other, the mechanical properties increased by two times, compared to the composites with fibers crossing each other. In the accurately aligned bamboo composites, the cross sections of the fibers were largely deformed by compression stress during hot-press forming. Thus, the gaps among fibers decreased, and interfacial adherence was improved. The effect of fabrication temperature on the mechanical properties of the FCNF-bamboo composite was also examined. It was found that the maximum flexural modulus and strength of the composites were at approximately 250 °C, and the mechanical properties rapidly decreased above 270 °C due to thermal degradation of the bamboo fiber.
Effect of Removing Sucrose and Moisture in Bagasse Fibers on Improvement of Limit of Processing Temperature in Bagasse-Polypropylene Composites

Khan Md Sefat and Shinichi Shibata

Bioresources ( NC state University ) 15 ( 3 ) 5481 - 5488 2020.05 [ Peer Review Accepted ]

Type of publication: Research paper (scientific journal)

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This study focused on the increase of processing temperature of sugarcane bagasse fiber and polypropylene composites by removing sucrose and moisture in bagasse fibers. The relationship between the number of washing times and remaining sucrose in bagasse fiber were measured by high-performance liquid chromatography (HPLC). The analysis showed that original bagasse fibers, which had been obtained from a sugar cane mill, contained 4.0 wt% sucrose. To clarify the effect of the remaining sucrose and moisture on the limit of processing temperature in bagasse composites, the sucrose removed bagasse (40 wt%) or the original bagasse (40 wt%) was mixed with polypropylene (60 wt%), respectively. Then, the composite specimens were prepared with hot-press forming at various temperature. The observations of the composites appearances and their flexural tests were carried out. The results showed that the limit of processing temperature in the removing sucrose and moisture of bagasse composites was dramatically improved. The flexural properties in the sucrose and moisture removed bagasse composites did not decrease until 260 °C, while that in the original bagasse composites decreased at 240 °C.