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About the Role of the Bottleneck / Cork Interface on Oxygen Transfer

Abstract : The transfer of oxygen through a corked bottleneck was investigated using a manometric technique. First, the effect of cork compression on oxygen transfer was evaluated without considering the glass/cork interface. No significant effect of cork compression (at 23% strain, corresponding to the compression level of cork in a bottleneck for still wines) was noticeable on the effective diffusion coefficient of oxygen. The mean value of the effective diffusion coefficient is equal to 10(-8) m(2) s(-1), with a statistical distribution ranging from 10(-10) to 10(-7) m(2) s(-1), which is of the same order of magnitude as for the non-compressed cork. Then, oxygen transfer through cork compressed in a glass bottleneck was determined to assess the effect of the glass/cork interface. In the particular case of a gradient-imposed diffusion of oxygen through our model corked bottleneck system (dry cork without surface treatment; 200 and similar to 0 hPa of oxygen on both sides of the sample), the mean effective diffusion coefficient is of 5 X 10(-7) m(2) s(-1), thus revealing the possible importance of the role of the glass/stopper interface in the oxygen transfer.
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Contributeur : Pam - Université de Bourgogne <>
Soumis le : lundi 5 décembre 2016 - 17:32:02
Dernière modification le : jeudi 22 juillet 2021 - 03:03:19

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Aurélie Lagorce-Tachon, Thomas Karbowiak, Christian Paulin, Jean-Marc Simon, Régis D. Gougeon, et al.. About the Role of the Bottleneck / Cork Interface on Oxygen Transfer. Journal of Agricultural and Food Chemistry, American Chemical Society, 2016, 64 (35), pp.6672 - 6675. ⟨10.1021/acs.jafc.6b02465⟩. ⟨hal-01409219⟩



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