Читать книгу Additives for Water-borne Coatings - Wernfried Heilen - Страница 65

The solid covering of a defoamer droplet creates an irregular surface. The solid disturbs the symmetry between the air, oil and liquid phases and acts like a kind of pin, lowering the entry barrier into the lamella. Many defoamer oils can only overcome the entry barrier and penetrate the lamella surface if they are filled with solids. [3] [8].