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压缩微凝胶悬浮液的体积模量和剪切模量。

Bulk and shear moduli of compressed microgel suspensions.

作者信息

Liétor-Santos Juan José, Sierra-Martín Benjamín, Fernández-Nieves Alberto

机构信息

School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430, USA.

出版信息

Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Dec;84(6 Pt 1):060402. doi: 10.1103/PhysRevE.84.060402. Epub 2011 Dec 8.

DOI:10.1103/PhysRevE.84.060402
PMID:22304030
Abstract

We independently determine the bulk and shear moduli of compressed microgel suspensions and the bulk modulus of individual microgel particles and find that the elastic behavior of the suspension reflects the degree of compression of the particles. This feature, which is distinct from other soft materials such as emulsions or foams, can give rise to an unusually large difference between the bulk and shear moduli of the suspension. Our results extend our understanding of soft materials to systems based on compressible objects, opening up possibilities for engineering materials with drastically different responses to shear and compression.

摘要

我们独立测定了压缩微凝胶悬浮液的体积模量和剪切模量以及单个微凝胶颗粒的体积模量，发现悬浮液的弹性行为反映了颗粒的压缩程度。这一特性与乳液或泡沫等其他软材料不同，它会导致悬浮液的体积模量和剪切模量之间出现异常大的差异。我们的结果将我们对软材料的理解扩展到基于可压缩物体的系统，为设计对剪切和压缩有截然不同响应的工程材料开辟了可能性。

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Bulk and shear moduli of compressed microgel suspensions.压缩微凝胶悬浮液的体积模量和剪切模量。
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Dec;84(6 Pt 1):060402. doi: 10.1103/PhysRevE.84.060402. Epub 2011 Dec 8.
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