Ferreiro-Córdova Claudia, Del Gado Emanuela, Foffi Giuseppe, Bouzid Mehdi
Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405, Orsay, France.
Soft Matter. 2020 May 14;16(18):4414-4421. doi: 10.1039/c9sm02410g. Epub 2020 Apr 27.
We present a detailed numerical study of multi-component colloidal gels interacting sterically and obtained by arrested phase separation. Under deformation, we found that the interplay between the different intertwined networks is key. Increasing the number of components leads to softer solids that can accommodate progressively larger strains before yielding. The simulations highlight how this is the direct consequence of the purely repulsive interactions between the different components, which end up enhancing the linear response of the material. Our work provides new insight into mechanisms at play for controlling the material properties and opens a road to new design principles for soft composite solids.
我们对通过受阻相分离获得的多组分空间相互作用的胶体凝胶进行了详细的数值研究。在变形过程中，我们发现不同相互缠绕网络之间的相互作用是关键。增加组分数量会导致固体更软，在屈服前能够承受逐渐增大的应变。模拟结果突出了这是不同组分之间纯排斥相互作用的直接结果，这种相互作用最终增强了材料的线性响应。我们的工作为控制材料性能的作用机制提供了新的见解，并为软复合固体的新设计原则开辟了道路。
