Polydopamine-Coated Main-Chain Liquid Crystal Elastomer as Optically Driven Artificial Muscle

2018 ◽  
Vol 10 (9) ◽  
pp. 8307-8316 ◽  
Author(s):  
Hongmiao Tian ◽  
Zhijian Wang ◽  
Yilong Chen ◽  
Jinyou Shao ◽  
Tong Gao ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Main Chain ◽  
Artificial Muscle ◽  
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.

scholarly journals Electrically controlled liquid crystal elastomer–based soft tubular actuator with multimodal actuation

2019 ◽  
Vol 5 (10) ◽  
pp. eaax5746 ◽  
Author(s):  
Qiguang He ◽  
Zhijian Wang ◽  
Yang Wang ◽  
Adriane Minori ◽  
Michael T. Tolley ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Electrical Potential ◽  
Artificial Muscle ◽  
Soft Robot ◽  
Engineering Applications ◽  
Interior Space ◽  
Liquid Crystal Elastomer ◽  
Facile Fabrication ◽  
Nonuniform Strain

Soft tubular actuators can be widely found both in nature and in engineering applications. The benefits of tubular actuators include (i) multiple actuation modes such as contraction, bending, and expansion; (ii) facile fabrication from a planar sheet; and (iii) a large interior space for accommodating additional components or for transporting fluids. Most recently developed soft tubular actuators are driven by pneumatics, hydraulics, or tendons. Each of these actuation modes has limitations including complex fabrication, integration, and nonuniform strain. Here, we design and construct soft tubular actuators using an emerging artificial muscle material that can be easily patterned with programmable strain: liquid crystal elastomer. Controlled by an externally applied electrical potential, the tubular actuator can exhibit multidirectional bending as well as large (~40%) homogenous contraction. Using multiple tubular actuators, we build a multifunctional soft gripper and an untethered soft robot.

An Electrically Actuated Soft Artificial Muscle Based on a High-Performance Flexible Electrothermal Film and Liquid-Crystal Elastomer

2020 ◽  
Vol 12 (50) ◽  
pp. 56338-56349
Author(s):  
Haoran Liu ◽  
Hongmiao Tian ◽  
Jinyou Shao ◽  
Zhijian Wang ◽  
Xiangming Li ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
High Performance ◽  
Artificial Muscle ◽  
Liquid Crystal Elastomer ◽  
Electrically Actuated

scholarly journals Dual relaxation and structural changes under uniaxial strain in main-chain smectic-C liquid crystal elastomer

2015 ◽  
Vol 17 (1) ◽  
pp. 191-199 ◽  
Author(s):  
Dena M. Agra-Kooijman ◽  
Michael R. Fisch ◽  
Leela Joshi ◽  
Wanting Ren ◽  
Philip J. McMullan ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Relaxation Rate ◽  
Structural Changes ◽  
Main Chain ◽  
Uniaxial Strain ◽  
Liquid Crystal Elastomer ◽  
Smectic C ◽  
Dual Relaxation

Relaxation rate of the chevron angle, α becomes about ten times faster at strains exceeding 0.7 than at low strains.

The effect of alignment on the rate-dependent behavior of a main-chain liquid crystal elastomer

Soft Matter ◽  
2020 ◽  
Vol 16 (38) ◽  
pp. 8782-8798
Author(s):  
Cristina P. Martin Linares ◽  
Nicholas A. Traugutt ◽  
Mohand O. Saed ◽  
Alejandro Martin Linares ◽  
Christopher M. Yakacki ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Strain Field ◽  
Main Chain ◽  
Liquid Crystal Elastomer ◽  
Rate Dependent ◽  
Dependent Behavior

This study investigated the effect of alignment on the rate-dependent behavior of a main-chain liquid crystal elastomer (LCE). 3D-DIC was used to track the strain field and showed heterogeneous regions of strain from meson relaxation.

Artificial muscles based on liquid crystal elastomers

2006 ◽  
Vol 364 (1847) ◽  
pp. 2763-2777 ◽  
Author(s):  
Min-Hui Li ◽  
Patrick Keller
Keyword(s):  
Liquid Crystal ◽  
Main Chain ◽  
Uv Light ◽  
Shape Change ◽  
Artificial Muscle ◽  
Isotropic Phase ◽  
Artificial Muscles ◽  
Stimuli Responsive ◽  
Liquid Crystal Elastomers ◽  
The Individual

This paper presents our results on liquid crystal (LC) elastomers as artificial muscle, based on the ideas proposed by de Gennes. In the theoretical model, the material consists of a repeated series of main-chain nematic LC polymer blocks, N, and conventional rubber blocks, R, based on the lamellar phase of a triblock copolymer RNR. The motor for the contraction is the reversible macromolecular shape change of the chain, from stretched to spherical, that occurs at the nematic-to-isotropic phase transition in the main-chain nematic LC polymers. We first developed a new kind of muscle-like material based on a network of side-on nematic LC homopolymers. Side-on LC polymers were used instead of main-chain LC polymers for synthetic reasons. The first example of these materials was thermo-responsive, with a typical contraction of around 35–45% and a generated force of around 210 kPa. Subsequently, a photo-responsive material was developed, with a fast photochemically induced contraction of around 20%, triggered by UV light. We then succeeded in preparing a thermo-responsive artificial muscle, RNR, with lamellar structure, using a side-on nematic LC polymer as N block. Micrometre-sized artificial muscles were also prepared. This paper illustrates the bottom-up design of stimuli-responsive materials, in which the overall material response reflects the individual macromolecular response, using LC polymer as building block.

Light-driven core-shell fiber actuator based on carbon nanotubes/liquid crystal elastomer for artificial muscle and phototropic locomotion

Carbon ◽  
2021 ◽  
Author(s):  
Yue Yu ◽  
Lele Li ◽  
Enping Liu ◽  
Xue Han ◽  
Juanjuan Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Liquid Crystal ◽  
Artificial Muscle ◽  
Core Shell ◽  
Liquid Crystal Elastomer

A homeotropic main-chain tolane-type liquid crystal elastomer film exhibiting high anisotropic thermal conductivity

Soft Matter ◽  
2017 ◽  
Vol 13 (32) ◽  
pp. 5463-5468 ◽  
Author(s):  
Si-Jia Ge ◽  
Ti-Peng Zhao ◽  
Meng Wang ◽  
Lin-Lin Deng ◽  
Bao-Ping Lin ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Liquid Crystal ◽  
Main Chain ◽  
High Thermal Conductivity ◽  
Conductivity Anisotropy ◽  
Liquid Crystal Elastomer ◽  
Anisotropic Thermal Conductivity

Homeotropic aligned main-chain tolane-type liquid crystal elastomer films with high normal-to-plane thermal conductivity and high thermal conductivity anisotropy are described.

Carbon coated liquid crystal elastomer film for artificial muscle applications

2002 ◽  
Vol 96 (2-3) ◽  
pp. 184-188 ◽  
Author(s):  
Devanand K. Shenoy ◽  
D. Laurence Thomsen III ◽  
Amritha Srinivasan ◽  
Patrick Keller ◽  
Banahalli R. Ratna
Keyword(s):  
Liquid Crystal ◽  
Artificial Muscle ◽  
Liquid Crystal Elastomer ◽  
Carbon Coated

Liquid crystal elastomer for artificial muscle applications

2004 ◽  
Author(s):  
Jawad W. Naciri ◽  
Amritha Srinivasan ◽  
Banahalli R. Ratna
Keyword(s):  
Liquid Crystal ◽  
Artificial Muscle ◽  
Liquid Crystal Elastomer
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