Bicontinuous Conductive Composite Interface Network
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Solution Overview
Problem
Existing composite materials with conductive fillers for polymer materials suffer from poor mechanical properties and high viscosity, limiting their application, especially in infusion processes, due to the high concentration of conductive particles required for electrical conductivity and antistatic properties.
Innovation Solution
A conductive material with a thermoset and thermoplastic compound system, where the conductive compound forms a percolating network at the interface between two co-continuous phases, allowing for good electrical conductivity and antistatic properties with a low concentration of conductive fillers, achieved through a method involving mixing and curing of the compounds to create a bicontinuous structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high concentration of conductive particles is used to achieve electrical conductivity and antistatic properties, then the electrical conductivity is improved, but the mechanical properties deteriorate and viscosity increases
Solution Approach 1:
The patent uses a composite system with two co-continuous phases (thermoset and thermoplastic) where conductive particles are strategically positioned at the phase interfaces. This composite structure allows the conductive network to form through the continuous phase boundaries rather than requiring high bulk concentrations, thereby maintaining mechanical properties while achieving electrical conductivity.
Solution Approach 2:
The conductive particles are not uniformly distributed throughout the material but are specifically localized at the interfaces between the thermoset and thermoplastic phases. This local concentration at critical positions (phase boundaries) creates an efficient conductive network with minimal overall particle content, resolving the contradiction between conductivity and mechanical strength.
2Reliability
If a high concentration of conductive particles is used to achieve electrical conductivity and antistatic properties, then the electrical conductivity is improved, but the viscosity increases
Solution Approach 1:
The two-phase composite structure provides continuous pathways for electrical conduction along the phase interfaces, eliminating the need for high particle concentrations. This results in low viscosity material that remains easy to manufacture and process while achieving the desired electrical properties.
Solution Approach 2:
By concentrating conductive particles only at the phase interfaces rather than uniformly throughout the bulk material, the overall particle loading is minimized. This local positioning achieves percolation and conductivity at much lower concentrations, keeping the material viscosity low and suitable for manufacturing processes like infusion.
3Reliability
If conductive particles are added to polymer material, then electrical conductivity is achieved, but the concentration of conductive compound must be high which limits application in infusion processes
Solution Approach 1:
The patent creates a bicontinuous composite where both thermoset and thermoplastic phases form continuous networks. The conductive particles positioned at the interfaces of this continuous phase structure create conductive pathways without requiring high concentrations, enabling the material to be used in infusion processes where low viscosity is critical.
Solution Approach 2:
The strategic localization of conductive particles at phase interfaces rather than uniform distribution allows the material to achieve conductivity at low concentrations. This makes the material adaptable to infusion processes and other applications requiring low viscosity, expanding its versatility.
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 solution enables materials with excellent electrical conductivity and antistatic properties while maintaining mechanical integrity and low viscosity, facilitating the infusion of fibrous screens for producing reinforced composites.
Implementation Method 1
the conductive compound forms a percolating network wherein the conductive charges are located at the interfaces between the two phases
Implementation Method 2
a material having two co-continuous phases, wherein the conductive compound forms a percolating network
Data Source
AI summary
The invention relates to a conductive material comprising a first phase including a thermoset compound, a second phase, consisting of a smaller volume, including a thermoplastic compound, and a conductive compound, wherein the second phase is dispersed in the first phase, the two phases are bicontinuous, and the conductive compound is situated at the interface between the first and second phases.