Abstract
Foams, films, and bubbles are ubiquitous in our everyday lives and in processes such as textile dyeing and fermentation. The rupture dynamics of Newtonian soap films is well-studied, especially in the inviscid case. Here we explore the rupture of soap films formed from a non-Newtonian fluid, a colloidal suspension. When these films are thick compared to the length scale of the colloidal particles they are composed of, they rupture in a manner similar to a Newtonian fluid, even at quite high colloidal volume fractions. However, when allowed to thin before rupture to a thickness comparable to the colloidal size, they exhibit exotic instabilities such as wrinkling and folding like a fabric.
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