Graphene Peeling Device Outlet Design for Collision Prevention
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Solution Overview
Problem
Existing methods for preparing graphene, such as physical and chemical peeling of graphite, result in graphene defects, complex processes, and low yield, while sheet peeling devices designed for dispersion often grind graphene when it collides with the outlet, reducing its size and yield.
Innovation Solution
A peeling device with a specific outlet design where the minimum distance between the microchannel end and the outlet wall surface and the discharge speed satisfy the equation y≥(2.7×10−5)x−(4.2×10−5), minimizing collision pressure and preventing graphene from being ground, allowing for efficient preparation of large area graphene.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sheet material is passed through a microchannel at high speed for efficient peeling, then peeling efficiency is improved, but graphene collides with the outlet wall surface and is ground, reducing particle size and yield
Solution Approach 1:
The outlet is designed with a specific geometric configuration where the outlet wall surface is positioned at a controlled distance from the microchannel end, creating a spatial buffer zone. This dimensional adjustment prevents direct collision between the high-speed sheet material and the outlet wall, thereby eliminating the grinding effect while maintaining high peeling efficiency
Solution Approach 2:
The patent optimizes the geometric parameters of the outlet, specifically the minimum distance between the microchannel end and the outlet wall surface. By adjusting this parameter to satisfy the equation y≥(2.7×10−5)x−(4.2×10−5), the device achieves optimal balance between peeling efficiency and graphene particle size preservation
2Manufacturing precision
If outlet distance is increased to prevent graphene collision, then particle size is maintained, but device complexity increases
Solution Approach 1:
Instead of increasing the outlet distance excessively, the patent optimizes the geometric parameters within a specific range defined by the equation y≥(2.7×10−5)x−(4.2×10−5). This parameter optimization achieves the desired protection effect while minimizing the increase in device complexity
Solution Approach 2:
The outlet design applies the buffer zone concept locally at the critical collision point rather than uniformly throughout the entire device. This localized approach maintains graphene particle size without requiring complex modifications to the overall device structure
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 solution increases graphene preparation efficiency without grinding, resulting in larger, uniform graphene particles that maintain their properties, enhancing their use in applications like conductive pastes and thermal shielding.
Implementation Method 1
applying a high pressure to a microchannel having a micrometer scale diameter, thus applying a strong shear force to the material passing it through
Implementation Method 2
a fluid passing through a microchannel strongly collides the wall surface of an outlet
Data Source
AI summary
The present invention relates to a peeling device of sheet material for peeling off graphite, and the peeling device of sheet material according to the present invention is characterized in that a specific microchannel is used to apply a shear force required to peel off graphite, and simultaneously, graphene itself is not ground and the discharge flow rate of the graphene dispersion increases to increase graphene preparation efficiency.