TY  - JOUR
AB  - Purpose The synergistic effect of functionalization of multi-walled carbon nanotubes (CNT) using KMnO4 oxidation and initial tensile deformation on the electrical resistance of nanotube network/polyurethane composite subjected to elongation was studied.Design/methodology/approach Though the initial deformation irreversibly changed the arrangement of carbon nanotube network, subsequent cyclic elongation confirmed stable resistance values. The increased strain-dependent resistance of stimulated nanotube network/polyurethane composite was demonstrated by monitoring vibration of tambour leather after a bead impact and finger flexion.Findings The results showed a tenfold composite resistance increase for the composite prepared from KMnO4 oxidized nanotubes, quantified by a so-called gauge factor, from a value of about 20 in comparison to the network prepared from pristine nanotubes. This is a substantial increase, which ranks the stimulated composite among materials with the highest electromechanical response.Originality/value The results in this paper are new and have not been published yet. The paper combines different ideas which are developed together. It presents a new concept of synergistic effect of CNT oxidation and application of pre-strain simulation. Oxidation and pre-strain increases by several times the sensitivity of the tested composites which are predetermined for use as strain sensors of various sizes and shapes.
VL  - 38
IS  - 2
SN  - 0260-2288
DO  - 10.1108/SR-05-2017-0079
UR  - https://doi.org/10.1108/SR-05-2017-0079
AU  - Slobodian Petr
AU  - Riha Pavel
AU  - Olejnik Robert
AU  - Matyas Jiri
PY  - 2017
Y1  - 2017/01/01
TI  - Effect of pre-strain and KMnO4 oxidation of carbon nanotubes embedded in polyurethane on strain dependent electrical resistance of the composite
T2  - Sensor Review
PB  - Emerald Publishing Limited
SP  - 163
EP  - 170
Y2  - 2024/04/23
ER  -