Shear-driven solidification of dilute colloidal suspensions.
Shear-driven solidification of dilute colloidal suspensions.
复制标题
稀胶体悬浮液的剪切驱动凝固。
DOI：
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发表时间：
2011
影响因子：
8.6
通讯作者：
E. Del Gado
中科院分区：
文献类型：
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作者：
A. Zaccone;D. Gentili;Hua Wu;M. Morbidelli;E. Del Gado
我们表明，稀电荷稳定胶体的剪切诱导凝固是由于剪切诱导的大非布朗团簇的形成和破裂之间的相互作用造成的。虽然它们的尺寸受到破碎的限制，但它们的数量密度随着剪切时间而增加。流动停止后，簇的密集堆积通过颗粒键互连成刚性状态，每个颗粒键都涉及大量初级胶体键。稀胶体悬浮液中剪切驱动凝固的新兴图像将布朗系统的凝胶化与无热系统的干扰结合起来。
We show that shear-induced solidification of dilute charge-stabilized colloids is due to the interplay between shear-induced formation and breakage of large non-Brownian clusters. While their size is limited by breakage, their number density increases with shearing time. Upon flow cessation, the dense packing of clusters interconnects into a rigid state by means of grainy bonds, each involving a large number of primary colloidal bonds. The emerging picture of shear-driven solidification in dilute colloidal suspensions combines the gelation of Brownian systems with the jamming of athermal systems.