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ISSN : 1225-0112(Print)
ISSN : 2288-4505(Online)
Applied Chemistry for Engineering Vol.15 No.4 pp.417-423
DOI :

Research Papers : Synthesis and Characterization of Polyaniline and Its Derivatives Doped with Alkyl Groups

Jang Hoo Hong

Abstract

Polyaniline and its derivatives doped with dialkylsulfate [DAS: dimethylsulfate (DMS), diethylsulfate (DES), dipropylsulfate (DPS)] soluble in polar solvents were synthesized by incorporating polar functional groups in the polyaniline backbone, and doped by nucleophilic addition. Polyaniline doped with DAS (PANI-DAS) showed improved thermal stability, upon heat treatment at 160 ℃, compared to that of HCl doped polyaniline. Solubilities of PANI-DMS powder in polar solvents and polyethoxyaniline doped with DMS (PEtOANI-DMS) powder in various alcohols were observed in the range of 4 ~ 8 wt%/vol. and 5 ~ 10 wt%/vol., respectively. The electrical conductivities of PANI-DMS and PEtOANI-DMS films appeared in the range of 1.2 ~ 2.3 S/cm and 10-2~ 10-4S/cm, respectively. The improved solubility in organic polar solvents was due to the interactions between the polar sulfonate group, polar substituent and polar solvents.

연구논문 : 알킬그룹으로 도핑된 폴리아닐린과 그 유도체의 합성 및 특성

홍장후

초록

폴리아닐린에 극성 치환기의 도입과 친핵성 첨가반응에 의한 도핑으로 극성 용매에 용해성을 갖는 dialkylsulfate [DAS: dimethylsulfate (DMS), diethylsulfate (DES), dipropylsulfate (DPS)]로 도핑된 폴리아닐린과 그 유도체를 합성하였다. DAS로 도핑된 폴리아닐린(PANI-DAS)은 HCl로 도핑된 폴리아닐린에 비하여 160 ℃에서 열적 안정성이 우수함을 볼 수 있었다. PANI-DAS는 극성 용매내에서 4 ~ 8 wt%/vol, DMS가 도핑된 폴리에톡시아닐린(PEtOANI-DAS)은 다양한 알콜 용매 내에서 5 ~ 10 wt%/vol의 용해도를 보여 주었다. PANI-DMS, PEtOANI-DMS 필름의 전기전도도는 1.0 ~ 2.3 S/cm, 10-2~ 10-4S/cm을 나타내었다. 극성 용매 내에서의 용해도 증가 현상을 극성 sulfonate group, 극성 치환제, 극성 용매간의 상호 작용으로 설명하였다.

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