Wet-grinding assisted ultrasonic dispersion of pristine multi-walled carbon nanotubes (MWCNTs) in chitosan solution

► Chitosan/MWCNT suspension with good dispersion was prepared by wet-grinding assisted ultrasonication. ► Wet-grinding could improve the water wettability of MWCNTs and eliminate the barrier of air layer around MWCNTs to ultrasonicwaves. ► The composite from the chitosan/MWNTs suspension prepared by this method has an obvious improvement in mechanical property.