期刊
POLYMERS
卷 12, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/polym12051023
关键词
poly(N-methylaniline); anionic surfactant; surfactant concentration; electrical conductivity; the doping process
资金
- Conductive and Electroactive Polymers Research Unit of Chulalongkorn University
- 90th Anniversary of Chulalongkorn University Fund
- Thailand Science Research and Innovation Fund (TSRI)
- National Research Council of Thailand (NRCT)
- PETROMAT PhD Scholarship
Poly(N-methylaniline) (PNMA) is a polyaniline derivative with a methyl substituent on the nitrogen atom. PNMA is of interest owing to its higher solubility in organic solvents when compared to the unsubstituted polyaniline. However, the electrical conductivity of polyaniline derivatives suffers from chemical substitution. PNMA was synthesized via emulsion polymerization using three different anionic surfactants, namely sodium dodecylsulfate (SDS), sodium dodecylbenzenesulfonate (SDBS), and dioctyl sodium sulfosuccinate (AOT). The effects of surfactant structures and concentrations on electrical conductivity, doping level, crystallinity, morphology, and thermal stability were investigated. The re-doping step using perchloric acid (HClO4) as a dopant was sequentially proceeded to enhance electrical conductivity. PNMA synthesized in SDBS at five times its critical micelle concentration (CMC) demonstrated the highest electrical conductivity, doping level, and thermal stability among all surfactants at identical concentrations. Scanning electron microscopy (SEM) images revealed that the PNMA particle shapes and sizes critically depended on the surfactant types and concentrations, and the doping mole ratios in the re-doping step. The highest electrical conductivity of 109.84 +/- 20.44 S cm(-1) and a doping level of 52.45% were attained at the doping mole ratio of 50:1.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据