Glass fiber/epoxy composites with integrated layer of carbon nanotubes for deformation detection

0483258 - ÚH 2019 RIV GB eng J - Journal Article
Slobodian, P. - Pertegás, S.L. - Říha, Pavel - Matyáš, R. - Olejník, R. - Schledjewski, R. - Kovář, M.
Glass fiber/epoxy composites with integrated layer of carbon nanotubes for deformation detection.
Composites Science and Technology. Roč. 156, č. 1 (2018), s. 61-69. ISSN 0266-3538. E-ISSN 1879-1050
Grant - others:Ministerstvo školství, mládeže a tělovýchovy (MŠMT)(CZ) LO1504; Ministerstvo školství, mládeže a tělovýchovy - GA MŠk(CZ) ED2.1.00/19.0409
Institutional research plan: CEZ:AV0Z20600510
Institutional support: RVO:67985874
Keywords : carbon nanotubes * glass fibers * electrical properties * deformation * epoxy laminate
OECD category: Nano-processes (applications on nano-scale)
Impact factor: 6.309, year: 2018

An entangled multiwalled carbon nanotube film (Buckypaper) embedded in a polyurethane membrane was integrated into a glass fiber reinforced epoxy composite by means of a vacuum infusion to become a part of the composite and to give it a strain self-sensing functionality. In order to increase the strain sensing, pristine nanotubes were either oxidized by KMnO4 or Ag particles were attached to their surfaces. Moreover, the design of the carbon nanotube/polyurethane sensor allowed a formation of a film of micro-sized cracks, which increased its reversible electrical resistance and resulted in an enhancement of the strain sensing. Prestaining of the sensor with Ag-decorated nanotubes increased its sensitivity to strain, which was quantified by a gauge factor, more than hundredfold in comparison with the sensor with pristine nanotubes. The tests revealed that the integrated strain sensing exhibited a long-term electromechanical stability, which was linked to the level of strain in the host glass fiber/epoxy composite.
Permanent Link: http://hdl.handle.net/11104/0284624