3D-printed carrageenan-based nanocomposites for sustainable resistive sensing devices

Abstract

In the scope of natural based materials for sustainable technologies, this work reports on resistive sensors based on carrageenan composites with multi-wall carbon nanotubes (MWCNT). The materials were processed by direct-ink-writing with water as a solvent and mechanical, thermal and electrical property of printed composites have been tailored by varying filler content. It is shown that the inclusion of the carbonaceous fillers does not affect the morphology, polymer phase and the thermal properties of the polymer matrix. On the other hand, the Young modulus increases from 2 to 5 MPa, and the electrical conductivity from 8.3 × 10−6 up to 0.03 S m−1, with increasing filler content.