A flexible functional composite material with excellent thermal management capabilities and its preparation method

By introducing the synergistic effect of PDMS matrix, h-BN thermally conductive phase, and MPCM thermal storage phase into flexible composite materials, the problems of heat dissipation capacity and phase change material leakage are solved, achieving efficient thermal management and excellent mechanical properties.

CN121108745BActive Publication Date: 2026-05-26TONGJI UNIV
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Patent Information

Application Number
CN202511657589.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-11-13
Publication Date
2026-05-26
Estimated Expiration
2045-11-13

AI Technical Summary

Technical Problem

Existing flexible composite materials suffer from poor heat dissipation, low heat absorption efficiency of phase change materials, and insufficient mechanical compliance in terms of thermal management. In particular, leakage of phase change materials is prone to occur at high filler concentrations.

Method used

A matrix material was prepared by mixing PDMS prepolymer with a crosslinking agent, and MPCM powder and h-BN powder were added. Through magnetic stirring, vacuum degassing and gradient heating, a flexible functional composite material with uniformly distributed thermal conductive phase and thermal storage phase was prepared. The high thermal conductivity of h-BN and the phase change characteristics of MPCM were utilized to achieve synergistic heat dissipation and heat absorption.

Benefits of technology

It improves the overall thermal conductivity and heat absorption efficiency of the material, enhances mechanical properties, reduces the leakage risk of phase change materials, and achieves excellent thermal management and mechanical properties.

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Abstract

This invention provides a flexible functional composite material with excellent thermal management capabilities and its preparation method. It mainly comprises the following key components: a polydimethylsilane (PDMS) matrix material, a hexagonal boron nitride (h-BN) thermally conductive material, and a microencapsulated phase change microsphere (MPCM) thermal storage material with melamine-formaldehyde resin as the shell and n-eicosane as the core material. The preparation method involves only simple stirring, heating, and curing, and based on the crosslinking inhibition mechanism and external force constraints, it is possible to prepare flexible functional composite materials with high filler concentrations. The flexible functional composite material of this invention exhibits excellent mechanical and thermal management properties. The thermally conductive phase material can rapidly transfer heat flow, improving the heat absorption efficiency of the thermal storage phase material, while the thermal storage phase material can rapidly absorb heat, promoting temperature reduction. This invention is simple to prepare and has superior performance, showing promising application prospects in fields such as electronic skin, electronic devices, and advanced fabrics.
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