Preparation method of boron nitride-doped liquid crystal elastomer foam

The liquid crystal elastomer foam is prepared by the template method and is compounded with thermally conductive boron nitride powder, which solves the problem of intelligent control of thermally conductive materials in complex spatial environments, and realizes accurate perception and intelligent regulation of ambient temperature. The material has high thermal conductivity, resilience and intelligent perception characteristics.

CN119684664AActive Publication Date: 2025-03-25TIANJIN UNIV
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Patent Information

Application Number
CN202411873498.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-18
Publication Date
2025-03-25
Estimated Expiration
2044-12-18

AI Technical Summary

Technical Problem

Intelligent regulation of thermal conductivity materials in complex spatial environments is a core problem. It is difficult for the existing technology to achieve accurate perception and intelligent regulation of ambient temperature, which affects the independent intelligent regulation function of the thermal conductivity system.

Method used

The liquid crystal elastomer foam is prepared by the template method, and by combining with the thermally conductive boron nitride powder, combining the photoinitiator and the crosslinking agent, a liquid crystal elastomer/thermal conductive BN composite foam with thermally reversible deformation characteristics is formed.

Benefits of technology

It realizes accurate perception and intelligent adjustment of ambient temperature. The material has resilience, high thermal conductivity and intelligent perception characteristics, and is suitable for intelligent thermal management in complex environments.

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Abstract

The invention provides a preparation method of boron nitride-doped liquid crystal elastomer foam. The preparation method comprises the following steps: 1) preparing a NaCl salt template; 2) preparing a liquid crystal elastomer monomer solution: taking 1, 4-bis-[4-(3-acryloyloxy propoxy) benzoyloxy]-2-methyl benzene RM257 as a liquid crystal unit, and adding the 1, 4-bis-[4-(3-acryloyloxy propoxy) benzoyloxy]-2-methyl benzene RM257 into a sufficient toluene solution to prepare the liquid crystal elastomer monomer solution; 3) forming a liquid crystal elastomer network; (4) preparing pre-crosslinked liquid crystal elastomer foam; 5) liquid crystal elastomer foam deformation programming: putting the pre-crosslinked liquid crystal elastomer foam into a template for constant compression, and performing secondary crosslinking by using ultraviolet light in a constant compression state to form a secondary crosslinking network; at the moment, the liquid crystal elastomer foam has the characteristic of thermally induced reversible deformation, namely temperature-rising expansion and temperature-lowering shrinkage, and the process is cyclically reversible; and 6) preparing the liquid crystal elastomer / heat-conducting BN composite foam.
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