화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Applied Chemistry for Engineering, Vol.30, No.2, 212-218, April, 2019
DOI10.14478/ace.2018.1125  Export Citation
탄소나노튜브의 무전해 니켈도금 및 전자파 차폐 특성에 미치는 함산소불소화의 영향
Effect of Oxyfluorination on Electroless Ni Deposition of Carbon Nanotubes (CNTs) and Their EMI Shielding Properties
최예지1, 이경민1, 윤국진1, 2, 이영석1, 3, †
  • 1충남대학교 응용화학공학과
  • 2바이오니아
  • 3충남대학교 탄소융복합기술연구소
Ye Ji Choi1, Kyeong Min Lee1, Kug Jin Yun1, 2, and Young-Seak Lee1, 3, †
  • 1Department of Chemical Eng. And Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
  • 2Bioneer, 8-11 Munpyeong-seoro, Daedeok-gu, Daejeon 34302, Republic of Korea
  • 3Institute of Carbon Fusion Technology (InCFT), Chungnam National University, Daejeon 34134, Republic of Korea
E-mail:
초록
탄소나노튜브의 함산소불소화가 무전해 니켈도금 및 전자파 차폐효율에 미치는 영향을 확인하기 위하여, 탄소나노튜브를 산소 및 불소 혼합가스로 표면처리 후, 무전해 니켈도금을 실시하였다. 제조된 탄소나노튜브의 전자파 차폐 특성을 평가하기 위하여 폴리이미드 필름 위에 얇은 필름을 제작하였다. X-선 광전자분광법(XPS)을 이용하여 함산소불화 탄소나노튜브의 표면화학적 특성을 확인하였다. 또한, 열중량분석법(TGA)과 주사전자현미경(SEM) 분석결과, 함산소 불소화 정도에 따른 탄소나노튜브의 니켈도금된 양과 표면 형상이 변화하였음을 알 수 있었다. O2 : F2 = 1 : 9로 처리 후, 니켈도금된 탄소나노튜브는 1 GHz에서 약 19.4 dB 이상으로 가장 우수한 전자파 차폐효율을 나타내었다. 이러한 결과는 탄소나노튜브의 함산소불소화로 표면에 형성된 산소 및 불소 관능기 때문으로 여겨지며, 이 관능기들은 적절한 양의 니켈도금을 가능하게 하며 도금 용액에서의 분산성을 향상시켰다.
To investigate the effect of the oxyfluorination of carbon nanotubes (OF-CNTs) on electroless Ni deposition and electromagnetic interference shielding efficiency (EMI SE), CNTs were treated with a mixture of oxygen and fluorine gases and sequentially deposited with nickel. These samples were then manufactured into thin films on a polyimide film to evaluate their EMI SE. The surface chemical property of OF-CNTs was investigated by X-ray photoelectron spectroscopy. From the results of thermogravimetric and scanning electron microscopic analyses, it was found that both the amount of deposited Ni and the surface morphology changed depending on oxyfluorination. Moreover, the Ni-deposited CNTs pretreated with O2 : F2 = 1 : 9 vol% exhibited the maximum EMI SE as approximately 19.4 dB at 1 GHz. These results were attributed to the formation of oxygen and fluorine functional groups on the surface of CNTs due to the oxyfluorination, and the functional groups enabled to deposit a suitable amount of Ni and improve the dispersion in the deposited solution.
Keywords:Carbon nanotubes;Surface treatments;Electroless Ni deposition;EMI shielding efficiency
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