Ferreiro-Córdova Claudia, Foffi Giuseppe, Pitois Olivier, Guidolin Chiara, Schneider Maxime, Salonen Anniina
Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405, Orsay, France.
Tecnologico de Monterrey, Escuela de Ingeniería y Ciencias, Querétaro, Querétaro, 76130, Mexico.
Soft Matter. 2022 Apr 6;18(14):2842-2850. doi: 10.1039/d1sm01555a.
The elastic properties of a soft matter material can be greatly altered by the presence of solid inclusions whose microscopic properties, such as their size and interactions, can have a dramatic effect. In order to shed light on these effects we use extensive rheology computer simulations to investigate colloidal gels with solid inclusions of different sizes. We show that the elastic properties vary in a highly non-trivial way as a consequence of the interactions between the gel backbone and the inclusions. In particular, we show that the key aspects are the presence of the gel backbone and its mechanical alteration originating from the inclusions. To confirm our observations and their generality, we performed experiments on an emulsion that presents strong analogies with colloidal gels and confirms the trends observed in the simulations.
软物质材料的弹性特性会因固体内含物的存在而发生极大改变，这些内含物的微观特性，如尺寸和相互作用，可能会产生显著影响。为了阐明这些影响，我们使用大量的流变学计算机模拟来研究含有不同尺寸固体内含物的胶体凝胶。我们表明，由于凝胶骨架与内含物之间的相互作用，弹性特性以一种非常复杂的方式变化。特别是，我们表明关键因素是凝胶骨架的存在及其因内含物而产生的机械改变。为了证实我们的观察结果及其普遍性，我们对一种与胶体凝胶有很强相似性的乳液进行了实验，并证实了模拟中观察到的趋势。
