N. Cordeiro et al., CHARACTERIZATION OF THE CORK SURFACE BY INVERSE GAS-CHROMATOGRAPHY, Journal of colloid and interface science, 174(1), 1995, pp. 246-249
Inverse gas chromatography (IGC) at infinite dilution has been used to
study the surface properties of cork from Quercus suber, The dispersi
ve component of its surface energy was determined at different tempera
tures using n-alkanes as probes, and a gamma(S)(D) value of 38 +/- 1 m
J . m(-2) at 40 degrees C was obtained. The surface acid (A)/base(B) p
roperties were also evaluated by using polar probes and the results in
dicate that cork has an amphoteric character, with a K-A/K-B = 1.1. Th
e advantages of IGC, compared with the technique of contact angle meas
urements in the characterization of the cork surface, are discussed. (
C) 1995 Academic Press, Inc.