BNNT Thermal Interface Composite for Heat Dissipation and Insulation
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Solution Overview
Problem
Existing thermal management materials for electronic devices are inadequate in terms of thermal conductivity, mechanical strength, and electrical insulation, particularly for high-power components, leading to inefficiencies and reduced component lifetimes.
Innovation Solution
The use of high-quality boron nitride nanotubes (BNNTs) synthesized through high-temperature and high-pressure processes, refined to reduce impurities and agglomerations, and dispersed in a polymer matrix to form thermally conductive and electrically insulating composites for thermal interface materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrically-insulating thermal management materials are used, then electrical insulation is maintained, but thermal conductivity is inadequate
Solution Approach 1:
The patent employs composite materials by combining thermally conductive boron nitride nanotubes with electrically insulating polymer matrices. This composite structure enables the material to simultaneously achieve high thermal conductivity for heat dissipation and electrical insulation for safety, resolving the contradiction between thermal performance and electrical isolation requirements in thermal interface materials.
2Temperature
If high thermal conductivity materials are used, then heat dissipation improves, but electrical insulation is compromised
Solution Approach 1:
The invention uses composite materials by combining thermally conductive boron nitride nanotubes with electrically insulating polymer matrices. This composite structure enables the material to simultaneously achieve high thermal conductivity for heat dissipation and electrical insulation for safety, resolving the contradiction between thermal performance and electrical isolation requirements in thermal interface materials.
3Reliability
If advanced thermal management materials are developed, then performance and lifespan improve, but manufacturing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-synthesizing high-quality boron nitride nanotubes with controlled morphology and properties before incorporating them into polymer matrices. This pre-preparation of nanotube fillers with optimized characteristics simplifies the subsequent composite material fabrication process, making the overall manufacturing more manageable while achieving superior thermal management performance and extended component lifespan.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
BNNT composites enhance heat transfer and improve the performance, efficiency, and reliability of electronic devices by providing superior thermal conductivity and mechanical strength while maintaining electrical insulation.
Implementation Method 1
BNNTs conduct heat nearly eight times better than copper
Implementation Method 2
BNNTs, particularly when synthesized from catalyst-free, high-temperature and high-pressure processes
Data Source
AI summary
Thermal interface materials may be enhanced through the dispersion of refined boron nitride nanotubes (BNNTs) into a polymer matrix material and one or more microfillers. A refined BNNT material may be formed by reducing free boron particle content from an as-synthesized BNNT material, and in some embodiments reducing h-BN content. Reducing these species improves the thermal conductivity of the BNNTs. Refined BNNTs may be deagglomerated to reduce the size and mass of BNNTs in agglomerations when the deagglomerated BNNT material is dispersed into a target polymer matrix material. The deagglomerated BNNT material may be lyophilized prior to dispersion in the matrix material, to retain the deagglomeration benefit following return to solid state. The surface of the deagglomerated BNNT material may be modified, with one or more functional groups that improve dispersibility and heat transfer in the target polymer matrix material.