Лако-красочные материалы — производство

The foam lamella is elastic in nature due to the Marangoni effect, which is a mass transfer phenomenon resulting from a surface-tension gradi­ent between two fluids. As the lamella is stretched, the concentration of the surfactant is reduced at the interface, producing a higher surface tension, which results in pulling the lamella back together by move­ment of the liquid from the area of low surface tension. This additional foam stabilization effect is known as Gibbs elasticity.