Multi-wall carbon nanotube networks prepared from pure MWCNT and their oxidised forms effect of compressive strain on electric resistence

0367511 - ÚH 2012 RIV CZ eng C - Conference Paper (international conference)
Olejník, R. - Slobodian, P. - Říha, Pavel - Kimmer, D. - Sáha, P.
Multi-wall carbon nanotube networks prepared from pure MWCNT and their oxidised forms effect of compressive strain on electric resistence.
Conference Proceedings. Ostrava: TANGER, 2010, s. 78-82. ISBN 978-80-87294-19-2.
[NANOCON 2010. International Conference /2./. Olomouc (CZ), 12.10.2010-14.10.2010]
R&D Projects: GA AV ČR IAA200600803
Institutional research plan: CEZ:AV0Z20600510
Keywords : carbon nanotube network * compression * electrical resistence * stress sensor
Subject RIV: BM - Solid Matter Physics ; Magnetism

Multi-wall carbon nanotube networks were prepared by filtration of CNT aqueous dispersions. CNT dispersions were prepared with the help of surfactant system (sodium dodecyl sulfate with amylalcohol) by ultrasonication. Three types of MWCNT tubes were used. The first were pure CNT delivered by supplier. The others were oxidized CNT oxidized (1. acid solution of KMnO4; 2. the mixture of acids H2SO4 + HNO3). It was found that oxidization significantly changes properties of prepared carbon nanotube networks. There were observed differences in porous structures networks analyzed by SEM microscopy. Moreover, the apparent density of prepared MWCNT networks also changes according to the used CNT. The network electrical resistance is also affected by process of MWCNT oxidation as well as by compressive strain. It was found that the network resistance is sensitive to compressive strain both in the course of strain growth and when loading/unloading cycles are imposed.
Permanent Link: http://hdl.handle.net/11104/0202165