A Novel Side‐Chain Liquid Crystal Elastomer Exhibiting Anomalous Reversible Shape Change

2020 ◽  
Vol 132 (35) ◽  
pp. 15241-15246
Author(s):  
Lu Yin ◽  
Li Han ◽  
Feijie Ge ◽  
Xia Tong ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Shape Change ◽  
Side Chain ◽  
Liquid Crystal Elastomer

A Novel Side‐Chain Liquid Crystal Elastomer Exhibiting Anomalous Reversible Shape Change

2020 ◽  
Vol 59 (35) ◽  
pp. 15129-15134 ◽  
Author(s):  
Lu Yin ◽  
Li Han ◽  
Feijie Ge ◽  
Xia Tong ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Shape Change ◽  
Side Chain ◽  
Liquid Crystal Elastomer

Domains In Nematic Elastomers

1993 ◽  
Vol 328 ◽  
Author(s):  
A. Ten Bosch ◽  
L. Varichon
Keyword(s):  
Liquid Crystal ◽  
Mechanical Stress ◽  
Stress Tensor ◽  
Elastic Deformation ◽  
Order Parameter ◽  
Side Chain ◽  
Elastic Model ◽  
Liquid Crystal Elastomer ◽  
Nematic Order ◽  
Nematic Elastomers

ABSTRACTA theory based on an elastic model and including coupling between elastic deformation and nematic order parameter as well as an interaction between crosslinks and orientation is given. The nematic order parameter and the stress tensor have been determined on elongation and as a function of temperature as well as he anisotropy of the conformation of a side chain liquid crystal elastomer on application of a mechanical stress. A transition from a turbid, low ordered polydomain phase to a transparent, Monodomain is shown to occur.

scholarly journals A multifunctional shape-morphing elastomer with liquid metal inclusions

2019 ◽  
Vol 116 (43) ◽  
pp. 21438-21444 ◽  
Author(s):  
Michael J. Ford ◽  
Cedric P. Ambulo ◽  
Teresa A. Kent ◽  
Eric J. Markvicka ◽  
Chengfeng Pan ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Metal ◽  
Shape Change ◽  
Liquid Crystal Elastomer ◽  
Shape Morphing ◽  
Robot Locomotion ◽  
Mesoscale Structures ◽  
The Matrix ◽  
Liquid Crystal Phase Transition ◽  
Macroscopic Shape

Natural soft tissue achieves a rich variety of functionality through a hierarchy of molecular, microscale, and mesoscale structures and ordering. Inspired by such architectures, we introduce a soft, multifunctional composite capable of a unique combination of sensing, mechanically robust electronic connectivity, and active shape morphing. The material is composed of a compliant and deformable liquid crystal elastomer (LCE) matrix that can achieve macroscopic shape change through a liquid crystal phase transition. The matrix is dispersed with liquid metal (LM) microparticles that are used to tailor the thermal and electrical conductivity of the LCE without detrimentally altering its mechanical or shape-morphing properties. Demonstrations of this composite for sensing, actuation, circuitry, and soft robot locomotion suggest the potential for versatile, tissue-like multifunctionality.

scholarly journals Light-Driven Linear Inchworm Motor Based on Liquid Crystal Elastomer Actuators Fabricated with Rubbing Overwriting

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6688
Author(s):  
Mikołaj Rogóż ◽  
Jakub Haberko ◽  
Piotr Wasylczyk
Keyword(s):  
Liquid Crystal ◽  
Power Supply ◽  
Shape Change ◽  
Linear Motor ◽  
Green Laser ◽  
Linear Displacement ◽  
Shaft Length ◽  
Liquid Crystal Elastomer ◽  
Linear Motors ◽  
Scientific Instrumentation

Linear displacement is used for positioning and scanning, e.g., in robotics at different scales or in—scientific instrumentation. Most linear motors are either powered by rotary drives or are driven directly by pressure, electromagnetic forces or a shape change in a medium, such as piezoelectrics or shape-memory materials. Here, we present a centimeter-scale light-powered linear inchworm motor, driven by two liquid crystal elastomer (LCE) accordion-like actuators. The rubbing overwriting technique was used to fabricate the LCE actuators, made of elastomer film with patterned alignment. In the linear motor, a scanned green laser beam induces a sequence of travelling deformations in a pair of actuators that move a gripper, which couples to a shaft via friction moving it with an average speed in the order of millimeters per second. The prototype linear motor demonstrates how LCE light-driven actuators with a limited stroke can be used to drive more complex mechanisms, where large displacements can be achieved, defined only by the technical constrains (the shaft length in our case), and not by the limited strain of the material. Inchworm motors driven by LCE actuators may be scaled down to sub-millimeter size and can be used in applications where remote control and power supply with light, either delivered in free space beams or via fibers, is an advantage.

Modeling of photo-responsive liquid crystal elastomer actuators

2021 ◽  
Vol 560 ◽  
pp. 441-455
Author(s):  
Jundong Wu ◽  
Wenjun Ye ◽  
Yawu Wang ◽  
Chun-Yi Su
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystal Elastomer

4D Printing of Hygroscopic Liquid Crystal Elastomer Actuators

Small ◽  
2021 ◽  
pp. 2100910
Author(s):  
Keumbee Kim ◽  
Yuanhang Guo ◽  
Jaehee Bae ◽  
Subi Choi ◽  
Hyeong Yong Song ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
4D Printing ◽  
Liquid Crystal Elastomer

Effect of stretching angle on the stress plateau behavior of main-chain liquid crystal elastomers

Soft Matter ◽  
2021 ◽  
Vol 17 (11) ◽  
pp. 3128-3136
Author(s):  
Suzuka Okamoto ◽  
Shinichi Sakurai ◽  
Kenji Urayama
Keyword(s):  
Liquid Crystal ◽  
Main Chain ◽  
Stress Plateau ◽  
Liquid Crystal Elastomer ◽  
Ultimate Elongation ◽  
Liquid Crystal Elastomers

Stretching angle for a main-chain liquid crystal elastomer has pronounced effects on the width of the stress plateau as well as the ultimate elongation, while it has no effect on the plateau height.

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