Functionalized Polymer Matrices for Thermal Interface Materials
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Solution Overview
Problem
Current thermal interface materials face challenges in achieving high thermal conductivity without increasing the loading amount of thermally conductive fillers, which also affects their electrical insulation properties.
Innovation Solution
Functionalizing a polymer matrix with carbon-containing species, such as graphene or carbon nanotubes, using coupling agents to enhance thermal conductivity while maintaining electrical insulation properties, allowing for tunable electrical conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the loading amount of thermally conductive fillers is increased to achieve high thermal conductivity, then thermal conductivity is improved, but electrical insulation properties deteriorate and device complexity increases
Solution Approach 1:
The patent changes the chemical state of the carbon-containing species by functionalizing them with coupling agents, transforming them from conductive fillers to covalently bonded structural components. This parameter change in chemical bonding state allows the material to conduct heat while maintaining electrical insulation, as the covalent bonds alter the electronic structure of the carbon species.
Solution Approach 2:
The patent creates a composite system where carbon-containing species are chemically integrated with the polymer matrix through coupling agents. This composite approach combines the thermal conductivity of carbon species with the electrical insulation of the polymer matrix, achieving both properties simultaneously in a single material system.
2Temperature
If the loading amount of thermally conductive fillers is increased to achieve high thermal conductivity, then thermal conductivity is improved, but the complexity of the material system increases
Solution Approach 1:
The patent merges the functions of thermal conduction and structural integration by covalently bonding carbon-containing species to the polymer matrix. This consolidation eliminates the need for separate filler incorporation processes and reduces material system complexity, as the carbon species become an integral part of the polymer structure rather than discrete additives.
Solution Approach 2:
The patent changes the bonding parameter from physical mixing to covalent bonding, fundamentally altering how carbon species are incorporated into the material. This parameter change simplifies the material system by creating a chemically unified structure rather than a physically composite one with multiple interfaces and processing steps.
3Temperature
If conventional thermal interface materials are used to fill gaps between electronic components and heat sinks, then thermal transfer efficiency is improved, but the materials cannot simultaneously provide high electrical insulation and high thermal conductivity
Solution Approach 1:
The patent changes the electronic parameter of the carbon-containing species through functionalization, transforming them from electrically conductive fillers to electrically insulating structural components while maintaining thermal conductivity. This parameter change enables the material to simultaneously achieve high thermal transfer efficiency and electrical insulation in thermal interface applications.
Solution Approach 2:
The patent creates a universal material that performs multiple functions simultaneously: thermal conduction, electrical insulation, and structural integration. The functionalized carbon-polymer composite serves as both the matrix and the reinforcement, eliminating the need for separate functional components and enabling single-material thermal interface solutions.
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
The approach results in enhanced thermal conductivity of up to 40% improvement in silicone matrices and improved thermal stability, with the composite remaining electrically insulating, even with the incorporation of conductive fillers, at lower filler loadings.
Implementation Method 1
carbon-containing species covalently coupled with the polymer matrix
Implementation Method 2
The thermal interface material may be used to fill the gap between thermal transfer surfaces, in order to increase thermal transfer efficiency
Data Source
AI summary
Disclosed are thermally conductive composites that include a polymer matrix functionalized with a carbon-containing species covalently coupled with the polymer matrix. Also disclosed are methods that generally include functionalizing a carbon-containing species and incorporating the functionalized carbon-containing species into the polymer, such that the carbon-containing species are covalently bonded to the polymer matrix via a coupling agent.