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Liquid crystal elastomer material based on liquid metal nano-droplets

A technology of liquid crystal elastomer and liquid metal, which is applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve problems such as insufficient service life, and achieve the effects of excellent reversible deformation, excellent strain performance, and excellent toughness

Active Publication Date: 2021-11-26
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Technical problem: The purpose of the present invention is to provide a liquid crystal elastomer material based on liquid metal nano-droplets. The liquid crystal elastomer material has ultra-high fatigue resistance and solves the problem of insufficient service life of traditional liquid crystal elastomer materials in the actual application process. problems, and the preparation method of this kind of material is provided

Method used

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  • Liquid crystal elastomer material based on liquid metal nano-droplets
  • Liquid crystal elastomer material based on liquid metal nano-droplets
  • Liquid crystal elastomer material based on liquid metal nano-droplets

Examples

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Effect test

Embodiment 1

[0065] Embodiment 1: The specific preparation steps of the liquid crystal elastomer based on liquid metal nano-droplets are as follows:

[0066] Weigh liquid crystal monomer Y2003 (592.5 mg, 1.1 mmol), chain extender 2,2'-oxybis(ethane-1-thiol) (138.2 mg, 1.0 mmol), cross-linking agent pentaerythritol tetrakis (3- Mercaptopropionate) (24.4mg, 0.05mmol) and liquid metal (39.7mg) were added to a 10mL brown inoculum bottle; measure and dissolve 6.00μL catalyst dipropylamine in dichloromethane (1.8mL), then add into the above-mentioned brown strain bottle; use a sonicator to sonicate for 1 h to mix the above mixture evenly; pour the resulting solution into a polytetrafluoroethylene (PTFE) mold (3cm long x 2cm wide x 1cm deep), Then put it in an oven at 40°C for 1.5h; then carefully take out the obtained pre-crosslinked LM-LCE-5 sample from the PTFE mold; cut it and stretch it to about 270% of its original strength, and Keep it fixed; put it in an oven and keep it at 40°C for 10 h...

Embodiment 2

[0067] Example 2: Stress-strain, toughness, reversible deformation, maximum actuation stress, linear viscoelastic region, ultraviolet light drive, contraction force and self-repair test during heating process of the prepared liquid metal nano-droplet liquid crystal elastomer;

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Abstract

The invention discloses a liquid crystal elastomer material based on liquid metal nano-droplets as well as a preparation method and application thereof. Liquid metal nano-droplets are introduced into a liquid crystal elastomer matrix material, sulfur in a molecular chain dynamically interacts with liquid metal, the liquid metal nano-droplets can be uniformly distributed in a liquid crystal elastomer, and the liquid crystal elastomer material (LM-LCE) based on the liquid metal nano-droplets is finally prepared by thermally initiating secondary crosslinking. The mechanical property, especially the fatigue resistance, of the composite liquid crystal elastomer material is greatly improved, and the soft actuator material based on the liquid crystal elastomer and other long-term industrial application can be effectively promoted.

Description

technical field [0001] The invention relates to the field of liquid crystal elastomers, in particular to a liquid crystal elastomer material with ultra-high fatigue resistance formed by compounding liquid metal nano-droplets and liquid crystal elastomer base materials. Background technique [0002] Liquid crystal elastomers (LCEs), as an unconventional type of polymeric material that combines the anisotropy of mesogens and the entropy elasticity of elastomers, can be fabricated in response to external stimuli such as heat, light, humidity, electricity, and magnetic fields. reversible deformation. This excellent two-way shape memory function makes LCE materials have potential applications in soft actuators, sensors, micromechanical systems, soft robotics, etc. However, the unsatisfactory mechanical properties of conventional LCE materials, especially the moderate driving stress and poor fatigue resistance, have become fundamental obstacles hindering the practical industrial ...

Claims

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Application Information

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IPC IPC(8): C08F122/20C08K3/08C08K5/37C09K19/38
CPCC08F122/20C08K3/08C08K5/37C09K19/3857C08K2201/011
Inventor 杨洪陆海峰王猛
Owner SOUTHEAST UNIV
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