Liger-Belair Gérard, Voisin Cédric, Jeandet Philippe
Laboratoire d'CEnologie et de Chimie Appliquée, UPRES EA 2069, URVVC, Faculté des Sciences de Reims, Moulin de la Housse, B.P. 1039, 51687 Reims, Cedex 2, France.
J Phys Chem B. 2005 Aug 4;109(30):14573-80. doi: 10.1021/jp051650y.
In this paper, the kinetics of CO(2) bubble nucleation from tiny gas pockets trapped inside cellulose fibers immersed in a glass of champagne were investigated, in situ, from high-speed video recordings. Taking into account the diffusion of CO(2)-dissolved molecules from the liquid bulk to the gas pocket, a model was derived which enabled us to connect the kinetics of bubble nucleation with both fiber and liquid parameters. Convection was found to play a major role in this process. The boundary layer around the gas pocket where a gradient of CO(2)-dissolved molecules exists was also indirectly approached and found to be in the order of 10-20 mum. Because most of the particles adsorbed on the wall of a container or vessel free from any particular treatment are also believed to be cellulose fibers coming from the surrounding air, the results of this paper could be indeed extended to the more general field of nonclassical heterogeneous bubble nucleation from supersaturated liquids.
在本文中，我们通过高速视频记录，对浸没在一杯香槟酒中的纤维素纤维内部截留的微小气穴中二氧化碳气泡成核的动力学进行了原位研究。考虑到溶解的二氧化碳分子从液体主体向气穴的扩散，我们推导了一个模型，该模型使我们能够将气泡成核动力学与纤维和液体参数联系起来。结果发现对流在这个过程中起主要作用。我们还间接研究了气穴周围存在溶解二氧化碳分子梯度的边界层，发现其厚度约为10 - 20微米。由于大多数吸附在未经任何特殊处理的容器壁上的颗粒也被认为是来自周围空气的纤维素纤维，因此本文的结果确实可以扩展到过饱和液体中非经典异质气泡成核的更一般领域。
