Effect of crack formation under elongation in carbon nanotube networks embedded in polyurethane

0428543 - ÚH 2015 RIV CH eng C - Konferenční příspěvek (zahraniční konf.)
Slobodian, P. - Říha, Pavel - Benlikaya, R. - Olejník, R.
Effect of crack formation under elongation in carbon nanotube networks embedded in polyurethane.
Key Engineering Materials. Vol. 605. Zurich: Trans Tech Publications, 2014 - (Hristoforou, E.; Vlachos, D.), s. 231-234. ISSN 1662-9795.
[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; GA MŠk(CZ) ED2.1.00/03.0111
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 that the composite can be extended as by 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 carbon nanotubes (as well as functionalized multi-walled) were examined. The microscopic observation of crack formation and resistance change of the networks correlates well with the amount of cracking.
Trvalý link: http://hdl.handle.net/11104/0233882