US 11,926,697 B2 · Fluorine-containing liquid crystal elastomer and preparation method and use thereof

Abstract

The present invention provides a fluorine-containing liquid crystal polymer of Formula (1). The present invention also discloses a fluorine-containing liquid crystal elastomer, which comprises a copolymer of a fluorine-containing liquid crystal polymer of Formula (1) with a near-infrared dye of Formula (2). The fluorine-containing liquid crystal elastomer of the present invention shrinks due to the photothermal conversion effect of the material under the irradiation of near-infrared light, and thus is widely applicable to the field of actuators. The fluorine-containing liquid crystal polymer of the present invention introduces fluorine-containing segments into the cross-linked network of the liquid crystal polymer, to improve the mechanical performance of the material, and greatly extend the service time of light-controlled actuators.

Claims4

Dependent claims

A method for preparing a fluorine-containing liquid crystal elastomer, comprising steps of:

(1) under a protective atmosphere, reacting a fluorine-containing liquid crystal polymer of Formula (1) and a near-infrared dye of Formula (2) in the presence of Grubbs catalyst in an organic solvent at 58-65° C. for 1.5-2.5 h to obtain a preliminarily cross-linked polymer;
and
(2) applying an external force to the preliminarily cross-linked polymer, and allowing the preliminarily cross-linked polymer to react at 110-130° C. under the action of the external force, to obtain the fluorine-containing liquid crystal elastomer after the reaction is completed, wherein the compounds of Formulas (1)-(2) are shown below:
where X=5-12.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

17/270,593Filed 20 Aug 2020

Priority

CN 202010082606.X7 Feb 2020

Published

US 2022/0119589 A121 Apr 2022

Granted

12 Mar 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification26 codes

C08G 61/121
Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule: derived from organic halides
B29C 55/005
Shaping by stretching, e.g. drawing through a die; Apparatus therefor: characterised by the choice of materials
B29C 55/04
Of plates or sheets: uniaxial, e.g. oblique
C07C 227/16
From compounds containing already amino and carboxyl groups or derivatives thereof: by reactions not involving the amino or carboxyl groups

Fluorine-containing liquid crystal elastomer and preparation method and use thereof

Life of this patent

Fluorine-containing liquid crystal elastomer and preparation method and use thereof

Life of this patent

Abstract

Claims4