Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Electromagnetic Interference Shielding Characteristics of Electroless Nickel Plated Carbon Nanotubes

무전해 니켈 도금된 탄소나노튜브의 전자파 차폐 특성

  • Kim, Do Young (Department of Applied Chemistry and Biological Engineering, Chungnam National University) ;
  • Yun, Kug Jin (Department of Applied Chemistry and Biological Engineering, Chungnam National University) ;
  • Lee, Young-Seak (Department of Applied Chemistry and Biological Engineering, Chungnam National University)
  • 김도영 (충남대학교 바이오응용화학과) ;
  • 윤국진 (충남대학교 바이오응용화학과) ;
  • 이영석 (충남대학교 바이오응용화학과)
  • Received : 2014.03.10
  • Accepted : 2014.04.16
  • Published : 2014.06.10
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Abstract

In this study, multi-walled carbon nanotubes (MWCNT) were treated with nickel by electroless plating method for improving electromagnetic interference (EMI) shielding performance of MWCNT. The physical properties of electroless plated MWCNT were analyzed by using ultra-high resolution scanning electron microscope (UHR-SEM), thermogravimetry (TGA), sheet resistance analyzer and EMI shielding analyzer. EMI shielding efficiencies of nickel electroless plated MWCNT were measured to be 16 dB from 800 MHz band, which was 1.6 times increased compared to that of the activated MWCNT. Also, the average sheet resistance of nickel electroless plated MWCNT was measured to be $70{\Omega}/sq$, which was 56% decreased compared to that of the activated MWCNT. This result could be attributed to the plating morphology on the surface of MWCNT. This result could be attributed to uniformity of plating morphology on the surface, which has more effect on EMI shielding efficiency than the amount of nickel plating.

본 연구에서는 탄소나노튜브의 전자파 차폐 성능을 향상시키고자 무전해 도금법을 이용하여 다중벽 탄소나노튜브에 니켈을 도입하였다. 니켈 도금된 다중벽 탄소나노튜브의 물리적 특성은 고분해능주사전자현미경, 열중량분석기, 표면저항측정기, 전자파 차폐능 분석기를 이용하여 분석하였다. 니켈 도금된 다중벽 탄소나노튜브의 전자파 차폐 효율은 800 MHz 영역에서 16 dB로 측정되었으며 활성화 처리된 다중벽 탄소나노튜브에 비하여 최대 1.6배 증가하였다. 또한, 평균 표면 저항 역시 $70{\Omega}/sq$로 활성화 처리된 다중벽 탄소나노튜브에 비하여 최대 56% 감소한 수치를 나타내었다. 이러한 결과는 니켈 도금 함량에 비하여 표면의 도금 형태가 전자파 차폐 효율에 더 많은 영향을 끼치기 때문인 것으로 판단된다.

Keywords

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