Accelerated shape forming and recovering, induction, and release of adhesiveness of conductive carbon nanotube/epoxy composites by Joule heating

0524666 - ÚH 2021 RIV CH eng J - Článek v odborném periodiku
Slobodian, P. - Říha, Pavel - Olejník, R. - Matyáš, J.
Accelerated shape forming and recovering, induction, and release of adhesiveness of conductive carbon nanotube/epoxy composites by Joule heating.
Polymers. Roč. 12, č. 5 (2020), č. článku 1030. E-ISSN 2073-4360
Institucionální podpora: RVO:67985874
Klíčová slova: carbon nanotubes * epoxy * Joule heating * fast curing * accelerated forming * shape memory
Obor OECD: Nano-processes (applications on nano-scale)
Impakt faktor: 4.329, rok: 2020
Způsob publikování: Open access
https://www.mdpi.com/2073-4360/12/5/1030

The versatile properties of a nanopaper consisting of a porous network of multi-walled carbon nanotubes were applied to enhance the mechanical and electrical properties of a thermosetting epoxy polymer. The embedded nanopaper proved useful both in the monitoring of the curing process of the epoxy resin by the self-regulating Joule heating and in the supervising of tensile deformations of the composite by detecting changes in its electrical resistance. When heated by Joule heating above its glass transition temperature, the embedded carbon nanotube nanopaper accelerated not only the modelling of the composites into various shapes, but also the shape recovery process, wherein the stress in the nanopaper was released and the shape of the composite reverted to its original configuration. Lastly, in comparison with its respective epoxy adhesive, the internally heated electro-conductive carbon nanotube nanopaper/epoxy composite not only substantially shortened curing time while retaining comparable strength of the adhesive bonding of the steel surfaces, but also enabled a release of such bonds by repeated application of DC current.
Trvalý link: http://hdl.handle.net/11104/0309000