Reaction Kinetics and Catalysis Letters, Vol.80, No.1, 181-188, 2003
Sorption and sensing characteristics of polyvinyl alcohol films impregnated with CaCl2
PVA-CaCl2 composites were studied as humidity sensors. The composites give a relevant conductivity variation of 4.5-5 orders of magnitude in a wide range of relative humidity (0-86%). Water sorption isotherms evidence the existence of a size-effect in the formation of CaCl2.nH(2)O crystalline hydrate.