Liquid crystal elastomer coatings with programmed response of surface profile

被引：140

作者：

Babakhanova, Greta ^{[1
,2
]}

Turiv, Taras ^{[1
,2
]}

Guo, Yubing ^{[1
,2
]}

Hendrikx, Matthew ^{[3
,4
]}

Wei, Qi-Huo ^{[1
,2
]}

Schenning, Albert P. H. J. ^{[3
,4
]}

Broer, Dirk J. ^{[3
,4
]}

Lavrentovich, Oleg D. ^{[1
,2
,5
]}

机构：

[1] Kent State Univ, Liquid Crystal Inst, Kent, OH 44242 USA

[2] Kent State Univ, Chem Phys Interdisciplinary Program, Kent, OH 44242 USA

[3] Eindhoven Univ Technol, Dept Chem Engn & Chem, Funct Organ Mat & Devices, NL-5612 AZ Eindhoven, Netherlands

[4] Eindhoven Univ Technol, Inst Complex Mol Syst, POB 513, NL-5600 MB Eindhoven, Netherlands

[5] Kent State Univ, Dept Phys, Kent, OH 44242 USA

来源：

NATURE COMMUNICATIONS | 2018年 / 9卷

基金：

美国国家科学基金会; 欧洲研究理事会;

关键词：

POLYMER NETWORKS; TOPOLOGICAL DEFECTS; TOPOGRAPHIES; FLUCTUATIONS; CURVATURE; DYNAMICS; SHEETS;

D O I：

10.1038/s41467-018-02895-9

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Stimuli-responsive liquid crystal elastomers with molecular orientation coupled to rubber-like elasticity show a great potential as elements in soft robotics, sensing, and transport systems. The orientational order defines their mechanical response to external stimuli, such as thermally activated muscle-like contraction. Here we demonstrate a dynamic thermal control of the surface topography of an elastomer prepared as a coating with a pattern of in-plane molecular orientation. The inscribed pattern determines whether the coating develops elevations, depressions, or in-plane deformations when the temperature changes. The deterministic dependence of the out-of-plane dynamic profile on the in-plane orientation is explained by activation forces. These forces are caused by stretching-contraction of the polymer networks and by spatially varying molecular orientation. The activation force concept brings the responsive liquid crystal elastomers into the domain of active matter. The demonstrated relationship can be used to design coatings with functionalities that mimic biological tissues such as skin.

引用

页数：9

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