A focus on the features of polyaniline nanofibres prepared via developing the single crystals of their block copolymers with poly(ethylene glycol)

Bulletin of Materials Science

关键词: Polyaniline;    poly(ethylene glycol);    block copolymer;    nanofibre;    interfacial polymerization;    single crystal.;   

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Poly(ethylene glycol) (PEG)–polyaniline (PANI) diblock and triblock copolymers were synthesized viacopolymerization of aniline with amine-terminated PEG by interfacial polymerization using sulphuric acid as dopant andammonium peroxydisulfate (APS) as well as potassium hydrogen diiodate (PHD) as oxidants. The PHD-based synthesizedPANI nanorods possessed longer lengths, narrower diameter distribution and higher conductivity. The electroactivity ofsynthesized copolymers was characterized using ultraviolet–visible (UV–Vis) spectrometry, cyclic voltammetry (CV) andresistivity measurement. Even in the presence of dielectric PEG blocks, the synthesized block copolymers had a conductivityaround 3 S cm$^{−1}$. In a further step, the solution-grown single crystals were prepared to investigate the general features ofgrafted PANI nanorods using small-angle X-ray scattering (SAXS), transmission electron microscopy (TEM) and atomicforce microscopy (AFM). Based on AFM and SAXS analyses, the bimodal gel permeation chromatography (GPC) tracesobtained from the block copolymers were originated from the diameter distribution of nanofibres, not from the dispersity oftheir lengths and molecular weights.

【 授权许可】

CC BY