Mechanism of crack formation under elongation in carbon nanotube network embedded in polyurethane

0420922 - ÚH 2014 eng K - Konferenční příspěvek (tuzemská konf.)
Slobodian, P. - Říha, Pavel - Benlikaya, R. - Olejník, R.
Mechanism of crack formation under elongation in carbon nanotube network embedded in polyurethane.
2013.
[3rd International Conference on Materials and Applications for Sensors and Transducers. Praha (CZ), 13.09.2013-17.09.2013]
Grant ostatní: UTB Zlín(CZ) IGA/FT/2013/018; UTB Zlin(CZ) IGA/FT/2012/022
Výzkumný záměr: CEZ:AV0Z20600510
Institucionální podpora: RVO:67985874
Klíčová slova: carbon nanotube networks * polyurethyne * tensile deformation * network crack formation
Kód oboru RIV: BK - Mechanika tekutin

A highly deformable composite composed of a network of electrically-conductive entangled carbon nanotubes embedded in elastic polyurethane for sensing tensile deformation by changes in strain has been prepared. The testing has shown the composite can be extended as much as 400 % during which the electrical resistance increases more than 270 times. The high strain sensing can be attributed to the network cracking upon extension. To understand the cracking mechanism and explain the resistance change, the structural changes of networks made of pristine as well as functionalized multiwalled carbon nanotubes were examined. The microscopic observation of crack formation and resistance change of the networks correlates well with the number of cracks.
Trvalý link: http://hdl.handle.net/11104/0231373