Magnetic Filler Resin Composite With Surface-Treated Interfaces
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Solution Overview
Problem
Existing composite materials struggle to balance magnetic performance and mechanical fatigue resistance due to poor compatibility between metallic magnetic fillers and plastic surfaces, particularly under cyclic strains.
Innovation Solution
The method involves subjecting magnetic fillers to surface treatments like plasma treatment and/or coating to improve adhesion to a resin matrix, forming a composite structure with magnetic filler materials embedded in a resin matrix, which includes hard and soft magnetic materials, and optimizing filler content for enhanced interfacial compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If magnetic filler material is incorporated into resin matrix to achieve magnetic performance, then magnetic properties are improved, but adhesion between filler and matrix deteriorates due to poor compatibility between metallic and plastic surfaces
Solution Approach 1:
The patent applies plasma treatment to the magnetic filler material surface, which acts as an intermediary process to modify surface properties. This treatment introduces polar groups and increases surface energy, enabling better chemical bonding between the metallic filler and plastic resin matrix, thereby resolving the adhesion problem while maintaining magnetic performance
Solution Approach 2:
The patent changes the surface parameters of the magnetic filler material through plasma treatment, including surface energy, surface chemistry, and roughness. These parameter changes improve the wettability and chemical compatibility between the filler and resin matrix, solving the adhesion issue without affecting the bulk magnetic properties
2Strength
If surface treatment is applied to improve adhesion, then interfacial compatibility is improved, but manufacturing complexity increases due to additional treatment steps
Solution Approach 1:
The plasma treatment is performed as a preliminary action on the magnetic filler material before mixing with the resin matrix. This pre-treatment ensures that the surface modification is completed in advance, allowing the subsequent mixing and molding processes to proceed without additional complexity, as the improved adhesion is already built into the filler surface
3Use of energy by moving object
If high volume percentage of magnetic filler is used to enhance magnetic properties, then magnetic performance is improved, but mechanical fatigue resistance deteriorates due to poor interfacial bonding
Solution Approach 1:
Plasma treatment serves as an intermediary that creates strong interfacial bonding between the magnetic filler and resin matrix. This improved interface allows the composite to withstand cyclic loading better, preventing filler-matrix debonding under fatigue conditions even at high filler volume percentages, thus maintaining both magnetic performance and mechanical reliability
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 treated composite structure achieves high fatigue performance and intrinsic recyclability, providing lightweight materials with both magnetic properties and resistance to mechanical fatigue, suitable for applications requiring both.
Implementation Method 1
subjecting the provided magnetic filler material to a surface treatment for improving the adhesion of the magnetic filler material to the resin matrix in the composite structure, wherein the surface treatment is selected from plasma treatment and/or coating of the magnetic filler material
Data Source
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AI summary
The present invention relates to a method for producing a composite structure comprising a magnetic filler material embedded in a resin matrix. So far, a balance between sufficient magnetic performance and mechanical fatigue resistance, for applications involving cyclic strains of hundreds of thousands of cycles, has not been achieved, largely due to the poor compatibility between metallic and plastic surfaces. The present invention solves this problem by embedding magnetic filler material in a resin, after the magnetic filler material has been subjected to a possible surface treatment for improving the adhesion of the magnetic filler material to the resin matrix in the composite structure. Further, a composite structure comprising magnetic filler material embedded in a resin matrix obtainable by the method as disclosed in the current specification is disclosed. Still further, the use of the composite structure in applications requiring magnetic properties and resistance to mechanical fatigue is disclosed.