Title :
Application of an all-polymer flexural plate wave sensor to polymer/solvent material characterization
Author :
Sielmann, C. ; Berring, J. ; Walus, K. ; Stoeber, Boris
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC, Canada
Abstract :
An all-polymer, polyvinylidene fluoride (PVDF) flexural plate wave (FPW) acoustic sensor is used to determine the humidity-dependent material parameters of a polyvinyl alcohol (PVA) affinity layer as a sample analyte-affinity layer system. The Young´s modulus, volumetric swelling, mass change, and vapour/solid partition coefficient of drop cast PVA are determined through a set of vapour absorption experiments and numerical regression fitting. The low stiffness of the substrate and the high sensitivity of the antisymmetric flexural plate wave modes to stiffness effects allow for contributions of stiffness and mass changes to the sensor response. These experimental results are compared with reference measurements to examine the effectiveness of this method.
Keywords :
Young´s modulus; acoustic transducers; piezoelectric devices; regression analysis; Young´s modulus; all-polymer flexural plate wave sensor; flexural plate wave acoustic sensor; humidity-dependent material parameters; mass change; polymer/solvent material characterization; polyvinyl alcohol; polyvinylidene fluoride; regression fitting; vapour/solid partition coefficient; volumetric swelling; Films; Fitting; Humidity; Polymers; Stress; Substrates;
Conference_Titel :
Sensors, 2012 IEEE
Conference_Location :
Taipei
Print_ISBN :
978-1-4577-1766-6
Electronic_ISBN :
1930-0395
DOI :
10.1109/ICSENS.2012.6411501