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ISSN : 1225-0112(Print)
ISSN : 2288-4505(Online)
Applied Chemistry for Engineering Vol.21 No.1 pp.93-97
DOI :

Research Papers : Synthesis and Characterization of Polyaniline doped with Ionic Liquid

Jang Hoo Hong

Abstract

Polyaniline doped with ionic liquid (1,3-dimethylimidazolium methylsulfate, I-DMS) soluble in polar solvents (NMP, DMSO, DMF, m-cresol etc.) were synthesized by nucleophilic addition. Solubilities of PAN/I-DMS powder in polar solvents were observed in the range of 3∼6 wt%/vol., respectively. The electrical conductivities of PAN/I-DMS films appeared in the range of 10-2∼7 S/cm. Polyaniline doped with I-DMS (PAN/I-DMS) showed improved thermal stability and conductivity compared to that of HCl doped polyaniline (PAN/HCl) and dimethylsulfate (DMS) doped polyaniline (PAN/DMS) upon heat treatment at 160 ℃. These improved conductivity and solubility in organic polar solvents was explained with the interactions between the polar sulfonate group and polar solvents.

연구 논문 : 이온성 액체로 도핑된 폴리아닐린의 합성 및 특성

홍장후,조규성

초록

친핵성 첨가반응에 의한 극성 용매(NMP, DMSO, DMF, m-cresol etc.)에 용해성을 갖는 이온성 액체(1,3-dimethylimidazolium methylsulfate, I-DMS)로 도핑된 폴리아닐린(PAN/I-DMS)을 합성하였다. 극성 용매 내에서 PAN/I-DMS의 용해도는 3∼6 wt%/vol.을 나타내었고, PAN/I-DMS films의 전기전도도는 10-2∼7 S/cm를 나타내었다. PAN/I-DMS는 HCl로 도핑된 폴리아닐린(PAN/HCl)과 dimethylsulfate (DMS)로 도핑된 폴리아닐린(PAN/DMS)에 비하여 160 ℃에서 열적 안정성과 전기 전도성이 우수함을 볼 수 있었다. 극성 용매 내에서의 용해도와 전기 전도도 증가 현상을 극성 sulfonate group과 극성 용매간의 상호 작용으로 설명하였다.

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