Shogo Kumagai

Research Field

Arrhenius plot

10.1016/j.jwpe.2018.10.016

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Citations (17)

Close Packing of Cellulose and Chitosan in Regenerated Cellulose Fibers Improves Carbon Yield and Structural Properties of Respective Carbon Fibers

Biomacromolecules (2020)

Hilda Zahra Daisuke Sawada Chamseddine Guizani Yibo Ma Shogo Kumagai

A low carbon yield is a major limitation for the use of cellulose-based filaments as carbon fiber precursors. The present study aims to investigate the use of an abundant biopolymer chitosan as a natural charring agent particularly on enhancing the carbon yield of the cellulose-derived carbon fiber. The ionic liquid 1,5-diazabicyclo[4.3.0]non-5-enium acetate ([DBNH]OAc) was used for direct dissolution of cellulose and chitosan and to spin cellulose–chitosan composite fibers through a dry-jet wet spinning process (Ioncell). The homogenous distribution and tight packing of cellulose and chitosan revealed by X-ray scattering experiments enable a synergistic interaction between the two polymers during the pyrolysis reaction, resulting in a substantial increase of the carbon yield and preservation of mechanical properties of cellulose fiber compared to other cobiopolymers such as lignin and xylan.

Regenerated cellulose

Biopolymer

Viscose

Cellulose fiber

10.1021/acs.biomac.0c01117

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Citations (37)

Mechanical Properties of Carbon Fiber-Reinforced hBN Matrix Composites at Elevated Temperature

Key engineering materials (1998)

Yohtaro Matsuo Shogo Kumagai Kazuhiro Yasuda

Matrix (chemical analysis)

10.4028/www.scientific.net/kem.164-165.137

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Citations (3)

Bench-scale PVC swelling and rod milling of waste wire harnesses for recovery of Cu, PVC, and plasticizers

Journal of Material Cycles and Waste Management (2021)

Harendra Kumar Shogo Kumagai Tomohito Kameda Yuko Saito Toshiaki Yoshioka

Plasticizer

Wet-milling

10.1007/s10163-021-01312-6

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Citations (4)

Practical dechlorination of polyvinyl chloride wastes in NaOH/ethylene glycol using an up-scale ball mill reactor and validation by discrete element method simulations

Waste Management (2019)

Jiaqi Lu Siqingaowa Borjigin Shogo Kumagai Tomohito Kameda Yuko Saito

Mill scale

10.1016/j.wasman.2019.08.034

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Citations (42)

Current Issues and Future Prospects in Plastic Recycling

Material Cycles and Waste Management Research (2018)

Yuko Saito Shogo Kumagai Tomohito Kameda Toshiaki Yoshioka

本稿では,プラスチックリサイクルが直面する課題を整理したうえで,プラスチック製品の安全性や機能性に大きく寄与している塩素や臭素等のハロゲンに焦点を当て,その対策を紹介する。プラスチックリサイクルの観点からは,ハロゲン除去が課題となっている。使用済みプラスチックの高度なリサイクルは,プラスチックの二次原料としての価値を高めるとともに,有用金属やレアメタル等の回収効率にも寄与すると考えられる。本稿では,プラスチックリサイクルで忌避されるハロゲンに焦点を当て,脱ハロゲン技術のこれまでの経緯と現状を紹介した。また,サーキュラーエコノミーパッケージの中でプラスチック二次原料品質基準の検討が進む EU の事例を取りあげ,今後使用済みプラスチックの高資源化の位置づけについて概観した。

10.3985/mcwmr.29.152

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Citations (4)

Tandem μ-reactor-GC/MS for online monitoring of aromatic hydrocarbon production via CaO-catalysed PET pyrolysis

Reaction Chemistry & Engineering (2017)

Shogo Kumagai Ryota Yamasaki Tomohito Kameda Yuko Saito A. Watanabe

Online monitoring of products by a tandem μ-reactor-GC/MS system revealed the CaO catalysed PET pyrolysis pathway.

Tandem

Aromatic hydrocarbon

10.1039/c7re00097a

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Citations (54)