Flaky Carbon Material Peeling via Microwave Heating in Non-Ionic Solvent
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Solution Overview
Problem
Current methods for producing flaky carbon materials are inefficient, often requiring long periods, strong acids or oxidants, and large-scale equipment, and can result in aggregation and impurities due to solvent gasification.
Innovation Solution
Irradiating a carbon material in a non-ionic solvent with microwaves while maintaining the solvent below its boiling point to prevent gasification, allowing for efficient peeling without large-scale equipment and minimizing reactions with strong acids or oxidants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If graphite is extracted in solvent, then graphite flakes can be obtained, but the concentration of graphite in solvent is as low as 1% or less, resulting in inefficient peeling
Solution Approach 1:
The patent changes the key parameter of solvent type from conventional solvents to non-ionic solvents specifically. This parameter change enables significantly higher graphite concentration (improving productivity) while maintaining effective peeling, resolving the contradiction between peeling efficiency and graphite concentration
2Productivity
If the carbon material is heated to gasify the solvent for peeling, then peeling can be achieved, but the flaky carbon material forms aggregates due to heat
Solution Approach 1:
The patent changes the temperature parameter by controlling heating to stay below the solvent's boiling point. This prevents solvent gasification that causes aggregation, while still enabling effective peeling through controlled thermal effects, thus resolving the contradiction between peeling efficiency and material stability
Solution Approach 2:
The non-ionic solvent acts as an intermediary medium that enables peeling without requiring gasification. The solvent facilitates layer separation through its unique properties while remaining in liquid state, preventing the aggregation problem associated with high-temperature heating
3Productivity
If conventional methods are used for peeling, then flaky carbon material can be produced, but strong acids or oxidants are required causing reactions and impurities
Solution Approach 1:
The patent extracts and eliminates the harmful chemical reagents (strong acids and oxidants) from the peeling process. By using non-ionic solvents with controlled heating, the method achieves effective peeling without the chemical reactions that generate impurities, resolving the contradiction between peeling capability and product purity
Solution Approach 2:
The patent converts the potential harm of high-temperature heating (which could cause aggregation and impurities) into a beneficial controlled thermal effect. By carefully controlling temperature below the boiling point, the thermal energy promotes peeling while avoiding the harmful effects of solvent gasification and material degradation
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 method enables efficient production of flaky carbon materials with reduced aggregation and impurities, facilitating easy solvent removal and improving peeling efficiency by maintaining the solvent in a non-gasified state.
Implementation Method 1
irradiating a carbon material in non-ionic solvent with microwaves
Implementation Method 2
heating the carbon material in such a manner that the non-ionic solvent that is in contact with the carbon material is not gasified
Data Source
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AI summary
In order to provide a method for producing a flaky carbon material without using large-scale equipment and without causing reaction with strong acid or oxidant for a long period of time, a method for producing a flaky carbon material includes: a step of immersing a carbon material having a layered structure in non-ionic solvent; and a step of irradiating the carbon material in the non-ionic solvent with microwaves, thereby heating the carbon material in such a manner that the non-ionic solvent that is in contact with the carbon material is not gasified, increasing spacing between layers of the carbon material, and peeling a flaky carbon material.