Lightweight Liquid Metal Elastomer Composite for Thermal Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Soft, elastically deformable materials with high thermal conductivity are challenging to develop due to the high density and high volume loading of liquid metal fillers, which are problematic for large-area, weight-sensitive applications such as wearable electronics and aerospace thermal control.
Innovation Solution
A lightweight liquid metal composition is created by combining a low-density phase, such as hollow glass microspheres, with a liquid metal to produce a multiphase liquid metal inclusion, which is then mixed with an elastomer to form a composite that can be cured, allowing independent control of thermal conductivity and density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If liquid metal fillers are used to achieve high thermal conductivity, then thermal conductivity is improved, but density increases
Solution Approach 1:
The patent uses composite materials by combining liquid metal droplets with an elastomer matrix to create a composite that achieves high thermal conductivity while maintaining low density. The liquid metal provides thermal conduction pathways while the elastomer matrix keeps the overall density low, resolving the contradiction between thermal conductivity and density
Solution Approach 2:
The patent applies local quality by concentrating liquid metal in localized droplet form dispersed throughout the elastomer matrix. This allows thermal conductivity to be enhanced locally at the droplet interfaces and along droplet chains, while the bulk material maintains the low density characteristic of the elastomer matrix
2Temperature
If high volume loading of liquid metal is used to achieve high thermal conductivity, then thermal conductivity is improved, but density increases
Solution Approach 1:
The patent changes the parameter of liquid metal morphology from bulk or large particles to micro-scale droplets. This parameter change allows for high volume loading of liquid metal to be achieved while the droplet size and distribution control the actual density impact, enabling high thermal conductivity at moderate effective density
3Temperature
If liquid metal fillers are used to achieve high thermal conductivity, then thermal conductivity is improved, but mechanical compliance decreases
Solution Approach 1:
The patent uses the elastomer matrix as a flexible continuous phase that surrounds and accommodates the liquid metal droplets. This flexible matrix structure allows the composite to maintain mechanical compliance and elasticity while the dispersed liquid metal droplets provide thermal conductivity, preventing the degradation of mechanical properties that would occur with continuous liquid metal phases
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 resulting composite achieves high thermal conductivity while significantly reducing density, making it suitable for weight-sensitive applications by maintaining thermal conductivity while decreasing density, thus enhancing mechanical compliance and thermal management capabilities.
Implementation Method 1
Soft, elastically deformable materials with high thermal conductivity are critical for numerous industries
Implementation Method 2
an elastic polymer
Data Source
AI summary
A lightweight liquid metal composition and a method for producing a lightweight liquid metal composition. The composition includes: a liquid metal inclusion; a low-density phase including a plurality of particles; and an elastic polymer. The method includes: combining a low-density phase with a liquid metal to produce a multiphase liquid metal (LM), the low-density phase including a material having a density less than a density of the LM; mixing the multiphase LM with an elastomer to produce an emulsion; and curing the emulsion to produce a lightweight LM composition.