Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Formaldehyde Adsorption Properties of Activated Carbon Fiber-Papers by Nitrogen Plasma Treatment

질소 플라즈마 처리에 따른 활성탄소섬유 페이퍼의 포름알데하이드 흡착 특성

  • Min, Chung Gi (Department of Chemical Engineering and Applied Chemistry, Chungnam National University) ;
  • Lim, Chaehun (Department of Chemical Engineering and Applied Chemistry, Chungnam National University) ;
  • Myeong, Seongjae (Department of Chemical Engineering and Applied Chemistry, Chungnam National University) ;
  • Lee, Young-Seak (Department of Chemical Engineering and Applied Chemistry, Chungnam National University)
  • 민충기 (충남대학교 응용화학공학과) ;
  • 임채훈 (충남대학교 응용화학공학과) ;
  • 명성재 (충남대학교 응용화학공학과) ;
  • 이영석 (충남대학교 응용화학공학과)
  • Received : 2022.09.16
  • Accepted : 2022.10.18
  • Published : 2022.12.10
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Abstract

Formaldehyde is an indoor pollutant that is harmful to humans, such as causing respiratory and skin diseases. Nitrogen plasma treatment was performed to introduce nitrogen groups on the surface of the activated carbon fibers (ACFs), and the adsorption characteristics of formaldehyde for the surface-modified ACFs were considered. As the nitrogen gas flow rate increased, the content of nitrogen functional groups introduced to the surface of the ACFs increased by about 7%, and the ratio of nitrogen functional groups to each type present was similar. Ultramicropores increased on the ACFs surface due to the etching effect of plasma treatment. The adsorption efficiency of formaldehyde on the modified ACFs surface was also enhanced. However, under the nitrogen flow rate of 120 sccm or more, the surface of the ACFs was excessively etched, and the specific surface area and the formaldehyde adsorption capacity decreased. Therefore, the content of the nitrogen groups is the main factor in the adsorption of formaldehyde on the nitrogen plasma-treated ACFs, but it can be found that the adsorption efficiency of formaldehyde is improved when the ACFs have a suitable pore structure.

포름알데하이드는 호흡기 및 피부 질환을 일으키는 등 인체에 유해한 실내 환경 오염물질로 알려져 있다. 본 연구에서는 활성탄소섬유 표면에 질소 작용기를 도입하기 위하여 질소 플라즈마 처리를 하였고, 질소 작용기 함유 활성탄소섬유에 대한 포름알데하이드 흡착 특성을 고찰하였다. 주입되는 질소 가스의 유량이 증가함에 따라 활성탄소섬유 표면에 도입되는 질소 작용기의 함량이 약 7% 정도 증가하였으며, 존재하는 질소 작용기의 종류별 비율도 유사하였다. 또한 플라즈마 처리에 의한 식각 효과로 인하여 활성탄소섬유 표면에 초미세기공이 증가하였다. 이에 따라 표면 개질된 활성탄소섬유의 포름알데하이드 흡착 효율도 증가하였다. 그러나, 질소 유량이 120 sccm 이상인 조건에서는 활성탄소섬유 표면이 과도하게 식각되어, 비표면적이 감소하고 포름알데하이드 흡착 능력이 오히려 저하되었다. 따라서, 질소 플라즈마 처리된 활성탄소섬유의 포름알데하이드 흡착은 도입된 질소 작용기의 함량이 주요 요인이지만, 이와 함께 적합한 기공 구조를 가질 때 포름알데하이드의 흡착 효율이 향상됨을 알 수 있었다.

Keywords

Acknowledgement

본 연구는 한국 산업기술평가관리원의 탄소산업기반조성사업(고순도 가스 분리용 탄소분자체 및 시스템 제조기술 개발: 20016789)의 지원에 의하여 수행하였으며 이에 감사드립니다.

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