PMID: 22587113May 17, 2012Paper

Modeling mechanochromatic lamellar gels

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Wei Hong, Xiao Wang

Abstract

Consisting of alternating swelling and nonswelling polymeric layers (SLs and NLs), lamellar gels are one-dimensional photonic crystals with mechanically tunable optical properties. The lamellar structure induces a constraint between the SLs and the NLs, resulting in a highly anisotropic swelling behavior that is coupled with deformation. The coupling gives rise to the mechanochromatic effect, i.e., the color change in the material in response to mechanical deformations. A quantitative understanding of the coupling behavior is the key to many applications. This paper formulates a nonlinear continuum model for lamellar gels by considering the constrained swelling and anisotropic deformation in both layers. A finite-element method is further developed to simulate the mechanochromatic response of a lamellar gel undergoing a nonuniform field.

References

Aug 15, 2003·Nature·Pete Vukusic, J Roy Sambles
Oct 24, 2007·Nature Materials·Youngjong KangEdwin L Thomas
Mar 12, 2008·The Journal of Physical Chemistry. B·Taiki TominagaWen-Li Wu
Apr 11, 2009·Journal of the Royal Society, Interface·Stéphanie M Doucet, Melissa G Meadows

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