Preparation and characterization of conductor-insulator-semiconductor sandwich-structured MWCNT/double-layer polymer hybrid nanocomposites

摘要

The conductor-insulator-semiconductor sandwich-structured MWCNT/double-layer polymer hybrid nanocomposites (MWCNT-PS-PAA/PAn), multiwalled carbon nanotubes (MWCNTs) encapsulated with polystyrene (PS) inner layer and polyacrylic acid (PAA) doped polyaniline (PAn) outer layer via cova-lently linking, were fabricated through combining the successive surface-initiated atom transfer radical polymerization (Sl-ATRP) and in situ chemical oxidative polymerization techniques. The sandwiched structure was confirmed by the XPS and TEM analysis. Due to their conductor-insulator-semiconductor sandwich structure, the electrical conductivity of the nanocomposites obtained was far less than the similar small acids doped PAn/carbon nanotubes composites. Furthermore, the dispersibility of the sandwiched hybrid nanocomposites in organic solvent obviously improved compared with the pristine carbon nanotubes.