Poly(3,4-ethylenedioxythiophene)을 이용한 Core/Shell 나노입자와 원자이동 라디칼중합 공정에 의한 다중벽 탄소나노튜브 나노복합체 제조

주영태; 진선미; 김양수; Young Tae Joo; Seon Mi Jin; Yangsoo Kim

Polymer(Korea), Vol.33, No.5, 452-457, September, 2009

Preparation of Core/Shell Nanoparticles Using Poly(3,4-ethylenedioxythiophene) and Multi-Walled Carbon Nanotube Nanocomposites via an Atom Transfer Radical Polymerization

주영태¹, 진선미¹, 김양수^{1, 2, †}

¹인제대학교 나노공학부
²인제대학교 고안전 차량핵심기술연구소

Young Tae Joo¹, Seon Mi Jin¹, and Yangsoo Kim^{1, 2, †}

¹School of Nano Engineering, Inje University, Gimhae 621-749, Korea
²High Safety Vehicle Core Technology Research Center, Inje University, Gimhae 621-749, Korea

E-mail:

초록

다중벽 탄소나노튜브 및 전도성 고분자인 PEDOT으로 이루어진 하이브리드 나노재료를 제조하였다. 다중벽 탄소나노튜브 표면에 처리반응을 수행함으로써 -Br 특성기를 갖는 다중벽 탄소나노튜브를 제조하였으며, 이를 중합반응의 개시제로 사용하였다. 이와 함께 MMA를 사용하여 촉매와 리간드 존재 하에서 원자이동 라디칼중합 공정을 수행함으로써 다중벽 탄소나노튜브 표면에 PMMA가 공유결합된 나노복합체를 제조하였다. 미니에멀젼 중합공정을 통하여 제조된 PS 수용성 에멀젼에 EDOT과 산화제를 투입하여 산화중합을 수행함으로써 core-shell 구조를 갖는 PEDOT/PS 나노입자를 제조하였다. 실란화합물로 표면 처리한 silica 입자를 PEDOT:poly(styrene sulfonate)(PSS) 수용성 분산액에 투입한 후 표면화학 반응과정을 수행함으로써 silica 외벽에 PEDOT:PSS가 코팅된 나노입자를 제조하였다. 하이브리드 나노재료들은 TEM, FE-SEM, TGA, EDX, UV 그리고 FT-IR 등을 사용하여 분석되었다.

Hybrid nanomaterials consisting of multi-walled carbon nanotube(MWNT) and/or PEDOT of conductive polymer were prepared in this study. In the presence of catalyst and ligand, the MWNT-Br compound prepared by the successive surface treatment reaction was mixed with MMA to initiate the atom transfer radical polymerization process. PMMA was covalently linked to the surface of MWNT for the formation of MWNT/PMMA nanocomposites. The EDOT and oxidant were added in the aqueous emulsion of PS produced via a miniemulsion polymerization process and then it proceeded to carry out the oxidative chemical polymerization of EDOT for the preparation of PEDOT/PS nanoparticles with the core-shell structure. The aqueous dispersion of PEDOT:poly(styrene sulfonate)(PSS) was mixed with the silica particles treated with a silane compound and thus PEDOT:PSS-clad silica nanoparticles were prepared by the surface chemistry reaction. The hybrid nanomaterials were analyzed by using TEM, FE-SEM, TGA, EDX, UV, and FT-IR.

Keywords:hybrid nanomaterials;multi-walled carbon nanotube;poly(3,4-ethylenedioxythiophene);nanocomposites;nanoparticles

[References]

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[Referenced By]

[1] Iijima S, Nature, 354, 56 (1991)

[2] Shirakawa H, Louis EJ, MacDiarmid AG, Chiang CK, Heeger AJ, J. Chem. Soc., Chem. Commun., 578 (1977)

[3] Groenendaal BL, Jonas F, Freitag D, Pielartzik H, Reynolds JR, Adv. Mater., 12(7), 481 (2000)

[4] Kong H, Gao C, Yan DY, J. Am. Chem. Soc., 126(2), 412 (2004)

[5] Han MG, Foulger SH, Adv. Mater., 16(3), 231 (2004)

[6] Norton JCS, Han MG, Jiang P, Shim GH, Ying Y, Creager S, Foulger SH, Chem. Mater., 18, 4570 (2006)

[7] DeLongchamp D, Hammond PT, Adv. Mater., 13(19), 1455 (2001)