한국재료학회지 (Korean Journal of Materials Research)

  • 제27권2호
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  • Pages.113-118
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  • 2017
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  • 1225-0562(pISSN)
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  • 2287-7258(eISSN)
한국재료학회 (Materials Research Society of Korea)
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산수용액에서 처리된 흑연 구조와 열적 특성

Structural and Thermal Characteristics of Graphites Treated in Acidic Solutions

  • Song, Seung Won (Department of Advanced Materials Engineering, Dong-Eui University) ;
  • Min, Eui Hong (Solueta, Ltd., Research Center) ;
  • Lee, Dong Won (Solueta, Ltd., Research Center) ;
  • Kim, Jungsoo (Biomedical R&D Center, Pusan National University Hospital) ;
  • Oh, Weontae (Department of Advanced Materials Engineering, Dong-Eui University)
  • 투고 : 2016.11.04
  • 심사 : 2017.01.03
  • 발행 : 2017.02.27
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초록

Natural and expandable graphites were chemically treated in acidic aqueous solutions such as acetic acid or mixtures of acetic acid and nitric acid. Structures and thermal conductivities of the as-treated graphites were characterized in detail. Both graphites were significantly oxidized in the mixed acidic solution of $H_2SO_4$ and $HNO_3$, which condition was generally used for the oxidation of carbon nanotubes. This considerable oxidation of graphites caused a depression of their thermal conductivity. The structural characteristics, obtained by XRD and XPS, show that the graphites treated in the relatively weak acidic conditions (acetic acid or mixture of acetic acid and nitric acid) were quite similar to the untreated graphites. However, the thermal conductivities of both acidic-treated graphites were remarkably increased.

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