Polymer Nanocomposite Processing With Dual-Solvent Dispersion Control
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Solution Overview
Problem
Existing methods for preparing composite materials with polymers and nanomaterials face challenges in achieving homogeneous solutions with appropriate viscosity due to changes in polymer concentration and nanomaterial aggregation or settling, leading to poor deposition quality.
Innovation Solution
A method involving the use of two solvents with different boiling points is employed, where the polymer is dissolved in a high-boiling-point solvent and nanomaterials are dispersed in a low-boiling-point solvent, followed by mixing and heating to evaporate the low-boiling-point solvent, maintaining the solution's viscosity and ensuring homogeneous dispersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If nanomaterials are dispersed in a solvent before mixing with polymer solution, then nanomaterial dispersion is improved, but polymer concentration decreases and viscosity drops
Solution Approach 1:
The patent uses a specific solvent as an intermediary substance that facilitates nanomaterial dispersion while maintaining polymer solution integrity. The solvent acts as a bridge between nanomaterials and polymer matrix, enabling stable dispersion without significant viscosity loss.
Solution Approach 2:
The patent optimizes parameters including solvent-to-nanomaterial ratio, mixing sequence, and processing conditions to achieve stable nanomaterial dispersion while minimizing polymer concentration reduction and viscosity changes.
2Ease of manufacture
If nanomaterial powder is added directly to polymer solution, then process simplicity is improved, but nanomaterial aggregation occurs
Solution Approach 1:
The patent applies preliminary action by pre-dispersing nanomaterials in a solvent before introducing them to the polymer solution. This preliminary dispersion step prevents aggregation during mixing and ensures homogeneous distribution in the final composite.
3Quantity of substance
If polymer powder is added to nanomaterial dispersion, then viscosity control is improved, but nanoparticle sedimentation occurs
Solution Approach 1:
The patent inverts the conventional mixing sequence by adding nanomaterial dispersion to polymer solution rather than polymer powder to nanomaterial dispersion. This reversal prevents nanoparticle sedimentation by ensuring polymers are already in solution and can immediately interact with nanomaterials.
Solution Approach 2:
The patent ensures continuous useful action by maintaining nanomaterials in a dispersed state throughout the mixing process. The polymer solution continuously interacts with the nanomaterial dispersion, preventing sedimentation and ensuring complete dissolution without interruption.
4Loss of substance
If dispersion is dried to remove solvent, then nanomaterial recovery is improved, but re-agglomeration occurs
Solution Approach 1:
The patent extracts the solvent from the nanomaterial dispersion through evaporation, separating the solvent from nanomaterials. This extraction is performed under controlled conditions that prevent nanomaterial re-agglomeration during the removal process.
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
This approach results in a homogeneous composite material with controlled thickness, uniformity, and improved physical properties, enabling high-performance components like capacitors and inductors by preventing nanomaterial re-agglomeration and maintaining solution viscosity.
Implementation Method 1
heating the third solution so as to evaporate at least 10% by volume of the second solvent, and preferably so as to completely evaporate the second solvent
Implementation Method 2
the second solvent has a boiling point at least 30°C lower than the boiling point of the first solvent
Implementation Method 3
dissolution of the polymer in a first solvent, whereby a first solution is obtained
Implementation Method 4
dispersion of the nanomaterials in a second solvent different from the first solvent, whereby a second solution is obtained
Implementation Method 5
deposition of the final solution on a substrate or injection of the final solution into a mold and evaporation of the first solvent
Data Source
AI summary
A process for manufacturing a composite material comprising a polymer and nanomaterials, the process comprising the following steps: - dissolving the polymer in a first solvent, thereby obtaining a first solution; - dispersing the nanomaterials in a second solvent different from the first solvent, thereby obtaining a second solution; - mixing the two solutions, thereby obtaining a third solution; - heating the third solution so as to evaporate the second solvent, thereby obtaining a final solution; - deposition of the final solution onto a substrate and evaporation of the first solvent, the second solvent having a boiling point at least 30°C lower than that of the first solvent, and the viscosity of the final solution being equal to within 10% of the viscosity of the first solution.