Title :
Humidity sensing properties of sprayed thin film MWCNT-PVP composites
Author :
Ghahremanpour, M. ; Baumgartner, E. ; Bogner, M. ; Boufercha, N. ; Sägebarth, J. ; Sandmaier, H.
Author_Institution :
IFF, Univ. of Stuttgart, Stuttgart, Germany
Abstract :
We studied the change of electrical resistance under climate controlled conditions of thin film coatings which are composed of multi-walled carbon nanotubes (MWCNTs) and polyvinylpyrrolidone (PVP). The presented films are characterized via DC resistance measurements in a climate control chamber with different humidity levels. Our measurements show significant increase of relative resistance change with decreasing carbon nanotube loadings in the nanocomposite films, especially for higher air humidity levels. Resistance changes >; 400 % of a 10 wt. %-MWCNT-PVP film in a relative humidity range from 40 - 70 % have been measured.
Keywords :
carbon nanotubes; electric resistance measurement; humidity measurement; humidity sensors; polymer films; thin films; C; DC resistance measurements; air humidity levels; carbon nanotube loadings; climate control chamber; climate controlled conditions; electrical resistance; humidity sensing property; multiwalled carbon nanotubes; nanocomposite films; polyvinylpyrrolidone; sprayed thin film MWCNT-PVP composites; thin film coatings; Carbon nanotubes; Dispersion; Films; Humidity; Resistance; Sensors;
Conference_Titel :
Sensors, 2011 IEEE
Conference_Location :
Limerick
Print_ISBN :
978-1-4244-9290-9
DOI :
10.1109/ICSENS.2011.6127069
