薄泡沫膜的新状态方程。

New equation of state for thin foam films.

作者信息

Stubenrauch Cosima, Strey Reinhard

机构信息

School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, Dublin 4, Ireland.

出版信息

J Phys Chem B. 2005 Oct 27;109(42):19798-805. doi: 10.1021/jp0526703.

DOI:10.1021/jp0526703

PMID:16853560

Abstract

We recently constructed phase diagrams for thin foam films stabilized with nonionic surfactants by treating disjoining pressure (Pi) versus thickness (h) curves of foam films like p-V(m) isotherms of real gases. However, the correlations were qualitative rather than quantitative. In the present paper, an empirically derived equation of state for a quantitative description of foam film properties is proposed. New experimental data are provided which clearly illustrate under which conditions (a) subcritical, critical, and supercritical films are formed, (b) the common black film (CBF) to Newton black film (NBF) transition is reversible, and (c) CBF and NBF coexist.

摘要

最近，我们通过将泡沫薄膜的分离压力（Pi）与厚度（h）曲线视为真实气体的p-V(m)等温线，构建了由非离子表面活性剂稳定的薄泡沫薄膜的相图。然而，这些相关性是定性的而非定量的。在本文中，提出了一个根据经验推导的状态方程，用于定量描述泡沫薄膜的性质。提供了新的实验数据，这些数据清楚地说明了在哪些条件下：（a）形成亚临界、临界和超临界薄膜；（b）普通黑膜（CBF）到牛顿黑膜（NBF）的转变是可逆的；以及（c）CBF和NBF共存。