Stability of thin stagnant film on a solid surface with a viscoelastic air–liquid interface
- 作者：Ganesan Narsimhan and Zebin Wang
- 关键词：Film stability ; Viscoelastic interface ; Surface dilatational viscosity ; Surface dilatational elasticity ; Surface shear viscosity ; Surface shear elasticity ; Perturbation growth coefficient ; Thin film on solid ; Maxwell model ; Viscoelasticity ; Linear stabili
- 刊名：Journal of Colloid and Interface Science
- 出版年：2005
- 期刊代码：125_00219797
- 类别：ch
- 出版时间：2005
- 卷：291
- 期：1
- 页码：296-302
- 文件大小：160 K
摘要
Linear stability analysis for a film on a solid surface with a viscoelastic air–liquid interface is presented. The interfacial dilatational and shear viscoelastic properties were described by Maxwell models. Dilatational and shear interfacial elasticity and viscosity were shown to improve film stability. When the interfacial rheological properties are extremely large or small, the maximum perturbation growth coefficient is shown to reduce to those for immobile and mobile interfaces respectively. Calculated values of maximum growth coefficient for thin film stabilized by 0.5%β-lactoglobulin approached those of mobile films for thick (>2000 nm) and those for immobile films for thin (<100 nm) films respectively with the values lying between the two limits for intermediate film thicknesses.