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Kim, Gun-Ho
SoftHeat Group
Research Interests
  • Heat transfer mechanism in soft materials (e.g., plastics, animal tissues)
  • Development of thermally conductive plastics and high performance polymeric thermoelectric heat engine
  • Development of biomedical devices that use responses of animals to environmental temperature changes

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Interphase strengthening of carbon fiber/polyamide 6 composites through mixture of sizing agent and reduced graphene oxide coating

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Title
Interphase strengthening of carbon fiber/polyamide 6 composites through mixture of sizing agent and reduced graphene oxide coating
Author
Cho, Beom-GonJoshi, Shalik RamHan, Jong HunKim, Gun-HoPark, Young-Bin
Issue Date
2021-10
Publisher
ELSEVIER SCI LTD
Citation
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, v.149, pp.106521
Abstract
In this study, the interfacial bonding of carbon fiber (CF)/polyamide 6 (PA 6) composites is enhanced through the application of a mixture composed of a PA sizing agent and a reduced graphene oxide (RGO) coating onto a CF surface. RGO is introduced from shellac as a biodegradable polymer through an annealing process that is simple, eco-friendly, and inexpensive, resulting in shellac-derived RGO (SRGO) on the CF surface with strong bonding. Furthermore, it can be concluded that the reinforced interphase between the fiber and matrix by subsequent sizing treatment leads to complex physical and chemical bonding mechanisms. The chemical relationship between the sizing agent and SRGO was investigated using Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction analysis, differential scanning calorimetry, and thermogravimetric analysis. By modifying the sizing agent and mixture coating, the interlaminar shear strength increased by up to 70.7% for the CF/PA6 composites compared to those obtained without modification. Furthermore, the flexural strength and modulus of the mixture of the modified composites increased by 73% and 84%, respectively. Finally, the storage modulus and absorbed impact energy increased by 200% and 73.3%, respectively. These results suggest an improvement in the interfacial bonding of the composites upon the application of a mixture of PA sizing agent and SRGO coating.
URI
https://scholarworks.unist.ac.kr/handle/201301/53946
URL
https://www.sciencedirect.com/science/article/pii/S1359835X21002438?via%3Dihub
DOI
10.1016/j.compositesa.2021.106521
ISSN
1359-835X
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