Recrystallization Behavior and Mechanical, and Carbonizing Properties of Feather Keratin Resin Sheets Produced by Hot-Compression Molding

Kawahara, Yutaka; Ohnishi, Hiroaki; Asakawa, Seijiro; Wakizaka, Hiroyuki

doi:10.1080/00222348.2021.1887597

Cited by 6 publications

(1 citation statement)

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“…This process is also applicable to the resinification of feathers (e.g. waterfowl feathers wasted after the industrial use for bedclothes) predominately comprised of β-sheet structure polyamide [5], konjac glucomannan (KGM) comprised of (1→4)β-D-glucan structure [6]. In the fabrication of a fiber reinforced composite, higher fluidity of the resin during the molding, resultantly serving to reduce the generation of voids at the interface, is of great importance to enhance the stress transfer between the fiber and the matrix resin.…”

Section: Introductionmentioning

confidence: 99%

Tensile Behavior of the Hardwood Fiber-Curdlan Resin Green Composite Produced via the Direct-Resinification Process

KAWAHARA,

CHEN,

YAMAMOTO

2023

J. Text. Eng.

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The direct-resinification of the curdlan was attempted via the hot-press compression molding, controlling the water content in the starting curdlan powder as well as the molding conditions (i.e. temperature, pressure, processing time). By adding water to the curdlan powder so as to have the water content be around 22 wt%, the hot-press compression molding to resinify the curdlan powder could be made in the temperature range of 180-190 ℃, which was convenient to fabricate the hardwood fiber-curdlan resin composites, suppressing the thermal decomposition of the wood fibers. When the hardwood fiber-curdlan resin composites were molded at 190 ℃, the stress-strain curves sometimes exhibited a strain at break larger than 5 %. The addition of free water would promote the hydrolysis of curdlan molecules, and as a result the mobility of the molecules could have been enhanced. Further, the free water in the curdlan resin might have worked like a plasticizer. However, the strength of the curdlan resin decreased inevitably, compared with the data when the excess water was not added to the curdlan powder.

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Section: Introductionmentioning

confidence: 99%