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

fYear

2011

fDate

28-31 Oct. 2011

Firstpage

1032

Lastpage

1035

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensors, 2011 IEEE

Conference_Location

Limerick

ISSN

1930-0395

Print_ISBN

978-1-4244-9290-9

Type

conf

DOI

10.1109/ICSENS.2011.6127069

Filename

6127069