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Control by ATR-FTIR of surface treatment of cork stoppers and its effect on their mechanical performance

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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).

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Acknowledgments

Financial support was provided by Project INIAFEDER-RTA06-119-C02-01. The authors are grateful to the Catalonian Cork Institute (ICSuro) for its cooperation and to M. L. Caceres, L. Ortiz, and Dr. R. Juanola for their help.

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Authors and Affiliations

  1. INIA, Ctra. A Coruña km 7.5, 28040, Madrid, Spain

    Jose R. Gonzalez-Adrados, Maria C. Garcia-Vallejo, Maria J. Caceres-Esteban, Jose L. Garcia de Ceca, Florentino Gonzalez-Hernandez & Rosa Calvo-Haro

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  1. Jose R. Gonzalez-Adrados
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  2. Maria C. Garcia-Vallejo
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  3. Maria J. Caceres-Esteban
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  4. Jose L. Garcia de Ceca
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  5. Florentino Gonzalez-Hernandez
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  6. Rosa Calvo-Haro
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Correspondence to Jose R. Gonzalez-Adrados.

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Gonzalez-Adrados, J.R., Garcia-Vallejo, M.C., Caceres-Esteban, M.J. et al. Control by ATR-FTIR of surface treatment of cork stoppers and its effect on their mechanical performance. Wood Sci Technol 46, 349–360 (2012). https://doi.org/10.1007/s00226-011-0403-5

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  • DOI: https://doi.org/10.1007/s00226-011-0403-5

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