Citation
Gonzalez Adrados, Jose Ramon and García Vallejo, Mª Concepción and Cáceres Esteban, Mª José and García De Ceca, José Luis and González Hernández, Florentino and Calvo Haro, Rosa
(2012).
Control by ATR-FTIR of surface treatment of cork stoppers and its effect on their mechanical performance.
"Wood Science And Technology"
(n. 46);
pp. 349-360.
ISSN 0043-7719.
https://doi.org/10.1007/s00226-011-0403-5.
Abstract
Fourier transform infrared (FTIR) spectroscopy was applied to determine the type of surface treatment and dose used on cork stoppers and to predict the friction between stopper and bottleneck. Agglomerated cork stoppers were finished with two different doses and using two surface treatments: P (paraffin and silicone), 15 and 25 mg/stopper, and S (only silicone), 10 and 15 mg/stopper. FTIR spectra were recorded at five points for each stopper by attenuated total reflectance (ATR). Absorbances at 1,010, 2,916, and 2,963 cm -1 were obtained in each spectrum. Discriminant analysis techniques allowed the treatment, and dose applied to each stopper to be identified from the absorbance values. 91.2% success rates were obtained from individual values and 96.0% from the mean values of each stopper. Spectrometric data also allowed treatment homogeneity to be determined on the stopper surface, and a multiple regression model was used to predict the friction index (If = Fe/Fc) (R 2 = 0.93)
