화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.42, No.3, 513-520, May, 2018
DOI10.7317/pk.2018.42.3.513  Export Citation
공-증발 기상중합을 이용한 그래핀 에어로젤-폴리피롤 전도성 복합체의 제조
Preparation of Graphene Aerogel-Polypyrrole Conductive Composite by Using Simultaneous Co-vaporized Vapor Phase Polymerization
Frances Danielle M. Fernandez, 고영수1, 임진형†
  • 공주대학교 공과대학 신소재공학부
  • 1공주대학교 공과대학 화학공학부
Frances Danielle M. Fernandez, Young Soo Ko1, and Jin-Heong Yim†
  • Division of Advanced Materials Engineering, Kongju National University, 1223-24 Cheoandaero, Cheonan, Chungnam 31080, Korea
  • 1Department of Chemical Engineering, Kongju National University, 1223-24 Cheoandaero, Cheonan, Chungnam 31080, Korea
E-mail:
초록
본 연구에서는 우수한 전기적/기계적 성질을 가지는 탄소-전도성 고분자(polypyrrole, PPy) 복합체의 제조를 위해서 동결주조법과 열환원을 통하여 환원된 그래핀 옥사이드 에어로젤(reduced graphene oxide aerogel; rGOA) 구형체를 만들고 공-증발 기상중합법(simultaneous co-vaporized vapor phase polymerization; SC-VPP) 공정으로 rGOA-PPy 또는 rGOA-PPy-SiO2 복합체의 제조를 수행하였다. rGOA 구형입자의 표면 모폴로지는 환원된 GO 쉬트들이 막을 형성하여 매끄러운 형상을 하고 있다. 단면의 경우, 동결 주조공정에서 GO 수용액의 액적의 온도구배로 인하여 rGOA 구형입자의 반경방향으로 방사형 기공구조가 채널형태로 형성되었다. SC-VPP 공정을 사용하여 제조된 rGOA-PPy-SiO2 복합체의 모폴로지는 rGOA-PPy 복합체보다는 전체적으로 표면의 굴곡을 가지며 열린 기공이 표면에 노출되어 있어, 표면적이 넓었고, 단면의 기공의 배향구조가 잘 발달되어 있었다. 또한 rGOA-PPy-SiO2 복합체의 표면의 열린 기공에 의해서 입자 표면의 표면적이 커짐으로 인해서 전극과의 접촉면적이 넓어지고, 이로 인해서 rGOA 또는 rGOA-PPy 복합체보다 향상된 비 정전용량 특성을 보여주었다.
In this study, we fabricated spherical reduced graphene oxide aerogels (rGOA) through freeze casting and thermal reduction for the fabrication of carbon-conducting polymer (polypyrrole, PPy) composites with excellent electrical/ mechanical properties. The rGOA-PPy or rGOA-PPy-SiO2 composites were prepared by a simultaneous co-vaporized vapor phase polymerization (SC-VPP) process. The surface area of the rGOA-PPy-SiO2 composites prepared using the SC-VPP process was expected to be larger than that of the rGOA-PPy composites, because the surface of the rGOA-PPy- SiO2 composites was entirely curved and the open pores were exposed on the surface. The orientation of pore structure was well developed. In addition, the surface area of the particle increased due to the open pores on the surface of the rGOA-PPy-SiO2 composite, thereby widening the contact area with the electrode, resulting in showing improved specificcapacitance over rGOA or rGOA-PPy composite.
Keywords:conducting polymer;polypyrrole;graphene aerogel;simultaneous co-vaporized vapor phase polymerization;electrical property
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