Liquid Metal Metalgel With Nanoscale Polymer Network Stability
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Solution Overview
Problem
Existing liquid metal-polymer composites suffer from inadequate electrical conductivity and poor electromechanical stability due to limited liquid metal content and weak interactions between the polymer matrix and the liquid metal, compromising their performance in dynamic deformations.
Innovation Solution
A novel metalgel is developed by using a liquid metal as a fluid phase immobilized within a nanoscale polymer network, achieved through a method involving the preparation of polymer solutions, mixing with liquid metals, and solvent removal to create a metalgel with high electronic conductivity and softness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid metal is used as fluid phase in gel to achieve high electronic conductivity, then electrical conductivity is improved, but the gel loses softness and flexibility
Solution Approach 1:
The patent changes the physical state parameter of the polymer network from solid to nanoscale dispersed phase, allowing the liquid metal to maintain its fluidity while being contained within the polymer matrix. This parameter change enables the gel to simultaneously achieve high electrical conductivity from the liquid metal and softness from the nanoscale polymer network structure.
Solution Approach 2:
The patent creates a composite material system where liquid metal and polymer network coexist at the nanoscale. The liquid metal provides electrical conductivity while the polymer network provides mechanical softness and flexibility. This composite approach resolves the contradiction by combining materials with complementary properties at the nanoscale level.
2Reliability
If liquid metal content is increased to improve electrical conductivity, then electronic conductivity is improved, but the gel structure becomes unstable during dynamic deformation
Solution Approach 1:
The patent applies local quality by dispersing the polymer network at the nanoscale throughout the liquid metal matrix. This local dispersion creates regions of high interaction density that anchor the liquid metal in place during deformation, maintaining electrical conductivity pathways while providing mechanical stability. The nanoscale polymer networks locally constrain the liquid metal without disrupting the overall conductivity.
Solution Approach 2:
The patent utilizes a porous nanoscale polymer network structure that is dispersed throughout the liquid metal. This porous structure provides a framework that maintains the liquid metal in a stable configuration during deformation, preventing phase separation while allowing the liquid metal to maintain its conductivity. The nanoscale porosity provides sufficient surface area for strong interactions without compromising the liquid metal continuum.
3Stability of the object's composition
If polymer matrix and liquid metal interaction is strengthened to improve electromechanical stability, then stability is improved, but the liquid metal connectivity and conductivity are reduced
Solution Approach 1:
The patent transitions from macroscopic mixing to nanoscale dispersion, changing the spatial dimension of the polymer-liquid metal interface. At the nanoscale, the polymer networks can form strong interactions with the liquid metal while maintaining a high surface area to volume ratio that preserves liquid metal connectivity. This dimensional change allows strong interactions without sacrificing conductivity.
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 metalgel exhibits high electronic conductivity and adjustable mechanical properties, suitable for applications in soft and stretchable electromagnetic shielding, sealing materials with ultra-low oxygen permeability, and implantable electrodes.
Implementation Method 1
a nanoscale polymer network immobilizes the liquid metal continuum through an interactive force
Implementation Method 2
treating the liquid metal-polymer mixed solution by removing the good solvent from the uniformly dispersed mixed solution by heating
Implementation Method 3
treating the liquid metal-polymer mixed solution by removing the good solvent from the uniformly dispersed mixed solution by heating, freeze drying, or other methods
Data Source
AI summary
The present invention relates to the technical field of gels and polymer composite materials, and discloses a metalgel and a preparation method therefor. The method includes the steps of: dissolving a polymer powder in a good solvent to obtain a polymer solution; mixing a liquid metal with the polymer solution uniformly by homogenization; and removing the good solvent from the liquid metal-polymer mixed solution, to obtain the metalgel. Compared with related art, the present invention has the following advantages. A liquid metal continuum as a fluid phase is stably immobilized in a nano-scale polymer network through interaction. The unique structure enables the metalgel to have high conductivity (the electronic conductivity is up to 3.18×106 S/m), soft tissue-like softness (the Young's modulus is as low as 70 kPa) and low air permeability (the oxygen permeability is as low as 4.50×10−22 m2/s/Pa).