Rotating Disk Interfacial Dispersion for Composite Mixing
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Solution Overview
Problem
Current methods for mixing and dispersing nano and micro objects in composite materials often result in filler aggregation, leading to high viscosity and inefficient distribution within the host matrix, which affects the properties and performance of the final composite.
Innovation Solution
The use of interfacial dispersion devices with rotating surfaces and atomizing techniques to create aerosolized constituents that are deposited into a receptive medium, promoting shear and extensional flow deformation, which breaks down aggregates and ensures uniform distribution of nano and micro objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional mixing methods are used to disperse fillers in composite materials, then the mixing process is simple and equipment is basic, but filler aggregation occurs leading to high viscosity and poor distribution
Solution Approach 1:
The mixing process is divided into multiple stages: initial mixing, churning, and whipping. The whip mixer uses multiple wire whips that rotate at different speeds to create varied shear forces, segmenting the mixing action to progressively break down aggregates and achieve uniform distribution without requiring overly complex equipment
Solution Approach 2:
The apparatus employs dynamically rotating wire whips with variable speeds and trajectories. The whips rotate in different directions and at different rotational velocities, creating dynamic shear fields that adapt to the material state during mixing, thereby improving dispersion uniformity while maintaining a relatively simple device structure
2Manufacturing precision
If high shear mixing is applied to reduce filler aggregation, then filler distribution improves, but viscosity increases making mixing more difficult
Solution Approach 1:
The whip mixer creates dynamic mixing zones where shear rates vary spatially and temporally. Faster rotating outer whips generate high shear for aggregate breakdown, while slower inner whips provide gentler mixing, creating a gradient that reduces overall viscosity resistance while maintaining effective dispersion
Solution Approach 2:
The mixing action is segmented across multiple wire whips rotating at different speeds. This creates zones of high shear (near faster whips) and low shear (near slower whips), allowing the system to break aggregates without uniformly high viscosity throughout the entire material volume
3Manufacturing precision
If mixing time is extended to improve filler dispersion, then uniformity increases, but production efficiency decreases
Solution Approach 1:
The dynamically rotating whips create continuously varying shear fields that rapidly break down aggregates in the initial mixing phase. The variable speed rotation allows intensive mixing action concentrated in specific zones, achieving uniform distribution faster than static or single-speed mixers
Solution Approach 2:
The apparatus performs preliminary aggressive mixing with high-speed rotation to quickly break down major aggregates early in the process. This preliminary action reduces the total mixing time required, as subsequent lower-speed phases only need to refine the already-broken-down material
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 significantly reduces viscosity and enhances the uniform dispersion of fillers, resulting in improved mechanical properties and reduced filler aggregation in composite materials.
Implementation Method 1
promoting shear and extensional flow deformation, which breaks down aggregates
Implementation Method 2
promoting shear and extensional flow deformation, which breaks down aggregates
Implementation Method 3
atomizing techniques to create aerosolized constituents that are deposited into a receptive medium
Data Source
AI summary
Apparatus and methods for mixing and dispersing a dispersed phase in a medium comprise a rotating surface for receiving the medium and an atomizing apparatus positioned at the rotating surface for depositing aerosolized constituents of the dispersed phase into the medium. The medium is made receptive and the dispersed phase is aerosolized. Constituents of the aerosolized dispersed phase are deposited into the receptive medium to form a compound or composite. The medium may be deposited onto a rotating disk, and the dispersed phase may be sprayed onto the disk. A thin film can be generated on the disk to transfer, distribute, and disperse the dispersed phase. Liquid ligaments formed at the edge of the rotating disk further transfer, distribute, and disperse the dispersed phase into the medium. Ligaments may be broken into aerosols or deformed by attenuation/drawing to further promote transfer, distribution, and dispersion. A bulk composite/compound may be collected.