Coating Surface Particle Embedding for Additive Exposure
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Solution Overview
Problem
Existing methods for incorporating additives into polymers and coatings are inefficient, as they often result in additives being buried within the material rather than exposed on the surface, leading to excessive usage and difficulty in achieving uniform dispersion, and can be energy-intensive and require complex processes.
Innovation Solution
A method involving the application of a fluid containing particles to a molding form or coating, allowing the particles to be embedded within the polymer or coating material, ensuring they are securely positioned on the surface, using techniques such as sonicating, shaking, or applying magnetic fields to maintain their position during the molding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If bulk incorporation methods are used to disperse additives throughout the polymer bulk, then the additives are distributed throughout the material, but the additives are buried within the substrate and cannot be effectively presented to the external environment
Solution Approach 1:
The patent extracts the additives from the bulk polymer matrix and concentrates them at the surface through a coating process. The coating formulation contains a high concentration of additives that are applied to the polymer surface, ensuring that the additives are positioned where they can effectively interact with the external environment rather than being buried within the bulk material.
Solution Approach 2:
The patent applies local quality by creating a surface coating with different composition and properties than the bulk polymer. The coating layer is specifically formulated to have high additive concentration at the surface, while the bulk polymer maintains its structural properties. This localized enhancement ensures additives are where they are most needed for environmental interaction.
2Manufacturing precision
If melt-mixing is used to incorporate additives into polymers, then dispersion can be achieved, but high temperatures are required which consume energy and can decompose additives or damage polymers
Solution Approach 1:
The patent uses a coating formulation as an intermediary medium to deliver additives to the polymer surface. Instead of directly mixing additives into the molten polymer, the additives are first incorporated into a coating matrix (such as a resin or binder), which then serves as a vehicle to apply the additives to the surface. This intermediary approach allows for uniform dispersion without requiring high-temperature melt mixing.
Solution Approach 2:
The patent changes the processing parameters from high-temperature melt mixing to lower-temperature coating application. The coating process can be applied at or near ambient temperature, or at temperatures well below the polymer melting point, thereby avoiding thermal decomposition of additives and polymer damage while still achieving uniform dispersion through the coating application method.
3Reliability
If surface coating methods are used to modify surface properties, then surface enhancement can be achieved, but complex application and curing steps are required including surface pretreatment, priming, and curing
Solution Approach 1:
The patent merges the surface coating process with the polymer manufacturing process itself. By incorporating the coating step into the extrusion or molding process, the patent eliminates the need for separate surface pretreatment, priming, and curing steps that would otherwise be required. The coating is applied and cured as an integrated part of the manufacturing workflow, reducing overall process complexity.
4Reliability
If coating layers are applied to substrates, then surface modification can be achieved, but the coating layer thickness is substantially greater than particle dimensions, resulting in additives being entrapped within the coating
Solution Approach 1:
The patent employs a thin film coating approach where the coating layer thickness is controlled to be comparable to or only slightly greater than the additive particle dimensions. This thin film formulation ensures that additives are not deeply entrapped within thick coating layers, allowing them to remain accessible at or near the surface. The coating acts as a thin protective shell rather than a thick encapsulating layer.
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 allows for the efficient use of additives by ensuring they are exposed on the surface, reducing the amount needed, achieving uniform dispersion, and simplifying the process while maintaining energy efficiency and avoiding the complexities of traditional methods.
Implementation Method 1
A method involving the application of a fluid containing particles to a molding form or coating, allowing the particles to be embedded within the polymer or coating material, ensuring they are securely positioned on the surface
Implementation Method 2
using techniques such as sonicating, shaking, or applying magnetic fields to maintain their position during the molding process
Implementation Method 3
using techniques such as sonicating, shaking, or applying magnetic fields to maintain their position during the molding process
Data Source
AI summary
A method of modifying a coating material includes applying a fluid including a population of particles to a wet coating material disposed on a substrate. The method also includes drying the wet coating material so as to give rise to a coated article, where the particles are at least partially embedded in a surface of the dried coating material. The particles can be metallic nanowires, and a loading of the metallic nanowires in the dried coating material can be above an electric percolation threshold.