Dispersion of single-walled carbon nanotubes with poly(Pyridinium Salt)s containing various rigid aromatic moieties

摘要

Dispersions of single-walled carbon nanotubes (SWNTs) with several poly(pyridinium salt)s containing various aromatic diamine moieties are prepared via a non-covalent coagulation in DMSO. The interactions between SWNTs and polymers are characterized with various spectroscopic techniques. The ~1H NMR spectra suggest that strong interactions exist. The UV-Vis absorption spectra are independent of the incorporation of SWNTs. The resulting composites display high quenching efficiency in the photoluminescent properties; and transmission electron microscopy studies reveal the well-dispersed SWNTs in the ionic polymer matrices. The enhanced thermal stability of the composites is determined by thermogravimetric analysis. The fully grown lyotropic LC properties of the poly(pyridinium salt)s are disrupted by the introduction of SWNTs. Poly(pyridinium salt)s containing various rigid aromatic diamine moieties and SWNTs composites are prepared via a non-covalent coagulation method. Their emission spectra show strong quenching efficiency that depends on the nature of chemical structures of aromatic moieties and TEM micrographs reveal the dispersion of SWNTs in this class of ionic polymers.