Mechanochromic Photonic Gels

被引:161
作者
Chan, Edwin P. [1 ]
Walish, Joseph J. [2 ]
Urbas, Augustine M. [3 ]
Thomas, Edwin L. [4 ]
机构
[1] Natl Inst Stand & Technol, Mat Sci & Engn Div, Gaithersburg, MD 20899 USA
[2] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA
[3] Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA
[4] Rice Univ, Dept Mech Engn & Mat Sci, Houston, TX 77251 USA
关键词
photonic crystals; stimuli-responsive materials; block copolymers; gels; mechanochromism; BLOCK-COPOLYMER; LIQUID-CRYSTAL; MODULUS; BANDGAP; INDENTATION; DEFORMATION; REFLECTION; HYSTERESIS; SOLVENT; CHAIN;
D O I
10.1002/adma.201300692
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Polymer gels are remarkable materials with physical structures that can adapt significantly and quite rapidly with changes in the local environment, such as temperature, light intensity, electrochemistry, and mechanical force. An interesting phenomenon observed in certain polymer gel systems is mechanochromism - a change in color due to a mechanical deformation. Mechanochromic photonic gels are periodically structured gels engineered with a photonic stopband that can be tuned by mechanical forces to reflect specific colors. These materials have potential as mechanochromic sensors because both the mechanical and optical properties are highly tailorable via incorporation of diluents, solvents, nanoparticles, or polymers, or the application of stimuli such as temperature, pH, or electric or strain fields. Recent advances in photonic gels that display strain-dependent optical properties are discussed. In particular, this discussion focuses primarily on polymer-based photonic gels that are directly or indirectly fabricated via self-assembly, as these materials are promising soft material platforms for scalable mechanochromic sensors.
引用
收藏
页码:3934 / 3947
页数:14
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