Carbon nanotube networks in biopolymer solutions are explored as potential
ink systems for the extrusion printing of conducting structures. The
biopolymer gellan gum is found to act as an excellent dispersant of multiwalled
carbon nanotubes and has the appropriate fl ow properties to act
as a thickener for the controlled dispensing of carbon nanotube networks.
Absorbing substrates are found to improve the resolution and the fl exibility of
the printed structures. These printed conducting carbon nanotube networks
exhibit interesting mechanical and electrical characteristics, which are applied
to demonstrate their actuating and strain gauging capabilities.