Critical bubble diameters and Plateau border dimensions for drainage in aqueous xanthan foams

被引：16

作者：

Desbordes, Loic ^{[1
]}

Grandjean, Agnes ^{[1
]}

Frances, Fabien ^{[1
]}

Lorcet, Helene ^{[2
]}

Faure, Sylvain ^{[1
]}

机构：

[1] CEA, DES, ISEC, DMRC, Marcoule, France

[2] CEA, DEN, DTN, STCP,LTPS Cadarache, F-13108 St Paul Les Durance, France

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2021年 / 612卷 / 612期

关键词：

Drainage delay; Drainage initiation; Foam; Plateau border; Xanthan;

D O I：

10.1016/j.colsurfa.2020.125682

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Xanthan gum is used to stabilize aqueous foams in a wide number of commercial and industrial processes and is one of the numerous hydrosoluble polymers used to slow foam drainage. The slowing effects of viscosity on drainage flow have been well studied but the situations leading to a drainage delay are poorly described in the literature. The aim of this study was to shed light on the mechanisms governing drainage delay and drainage initiation. Drainage delay seems to be the result of liquid retention caused by the confinement of xanthan molecules in the Plateau borders, which increases local yield stress. Drainage begins when the bubbles and Plateau borders grow above a certain threshold size that allows liquid to flow through the foam.

引用

页数：10

共 44 条

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