Carbon Black Composite Material Uniform Dispersion
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Solution Overview
Problem
Existing composite materials with carbon black reinforcement in non-elastomeric matrices, such as metals, face challenges in achieving uniform dispersion and optimal reinforcing performance due to wettability and dispersibility issues.
Innovation Solution
A method involving the mixing of an elastomer with carbon black to form a composite elastomer, followed by the integration of this composite with a matrix material, utilizing techniques like open-roll kneading, closed kneading, or multi-screw extrusion to ensure uniform dispersion of carbon black within the matrix, which can be either metal or glass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If carbon black is directly mixed with matrix material (metal or glass), then the production process is simple, but the carbon black dispersibility and uniformity are poor
Solution Approach 1:
The production process is divided into two distinct stages: first mixing carbon black with elastomer to form composite elastomer, then mixing the composite elastomer with matrix material. This segmentation allows carbon black to be pre-dispersed in elastomer where it has good compatibility, before being distributed into the final matrix, thereby solving the dispersibility problem without requiring overly complex equipment.
Solution Approach 2:
Elastomer serves as an intermediary carrier material between carbon black and the final matrix material. Carbon black is first dispersed in elastomer to form composite elastomer with good dispersion, which then acts as a pre-mixed intermediate that can be uniformly distributed in the matrix material, achieving both good dispersibility and processability.
2Strength
If carbon black aggregate is used for reinforcement, then the reinforcing effect is strong, but the dispersibility in matrix material is poor
Solution Approach 1:
The patent applies different local qualities to different stages of the process: in the elastomer phase, carbon black aggregates are maintained to provide reinforcement, while in the final composite material, these aggregates are uniformly distributed through the two-stage mixing process. This allows the aggregates to function both as reinforcing elements and as dispersible units.
Solution Approach 2:
The elastomer and carbon black are mixed in advance to form composite elastomer with optimized dispersion characteristics before being introduced to the matrix material. This preliminary action ensures that carbon black is pre-positioned and pre-dispersed in a controlled manner, facilitating subsequent uniform distribution in the final composite.
3Manufacturing precision
If conventional mixing methods are used, then the production cost is low, but the carbon black dispersion uniformity is insufficient
Solution Approach 1:
The mixing process is segmented into two separate operations using conventional equipment: first mixing elastomer and carbon black, then mixing the resulting composite elastomer with matrix material. This segmentation achieves superior dispersion uniformity by breaking down the mixing task into manageable stages, each optimized for specific dispersion requirements, without requiring expensive specialized equipment.
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 carbon black composite material with improved dispersibility and reinforcing effects, including enhanced strength and abrasion resistance, while allowing for the use of carbon black in high-temperature applications and reducing material weight when using aluminum or aluminum alloys as the matrix.
Implementation Method 1
mixing an elastomer and carbon black to obtain a composite elastomer
Implementation Method 2
mixing the composite elastomer and a matrix material to obtain a carbon black composite material in which the carbon black is uniformly dispersed in the matrix material
Data Source
AI summary
A method of producing a carbon black composite material includes: a step (a) of mixing an elastomer and carbon black to obtain a composite elastomer; and a step (b) of mixing the composite elastomer and a matrix material to obtain a carbon black composite material in which the carbon black is uniformly dispersed in the matrix material.