Rotating Chamber Apparatus for Carbon Nanotube Composite Production
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Solution Overview
Problem
Current methods for producing composite materials with carbon nanotubes on the surface of base materials are inefficient, making these materials expensive and difficult to produce, as existing processes fail to effectively form and adhere CNT on the surface of carbonaceous or inorganic base materials.
Innovation Solution
A process using a tubular body with a rotating chamber and protrusions to repeatedly lift and drop the base material, ensuring effective contact with carbon source vapor for efficient CNT formation, combined with a catalyst application and controlled gas flow to prevent vapor diffusion and condensation, allowing for continuous production of composite materials with CNT bonded or adhered on the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional CVD processes are used to form carbon nanotubes on base materials, then carbon nanotubes can be synthesized, but the production efficiency is low and costs are high
Solution Approach 1:
The base material is rotated dynamically during the CVD process, allowing continuous exposure to carbon source vapor from multiple angles. This dynamic approach increases the effective reaction surface area and improves production efficiency while maintaining uniform CNT coverage
Solution Approach 2:
The base material is pre-treated with catalyst particles before the CVD process. This preliminary catalyst application ensures that carbon nanotubes form efficiently during the subsequent vapor deposition, reducing process time and cost
2Strength
If carbon nanotubes are formed on base material surface, then electrical conductivity and mechanical strength are improved, but the process is complex and difficult to implement
Solution Approach 1:
The invention combines catalyst application, base material preparation, and CVD processing into an integrated system. The rotating base material approach merges multiple exposure functions into a single operational mechanism, simplifying the overall process while achieving superior mechanical properties
Solution Approach 2:
The process utilizes controlled changes in temperature, gas flow rates, and rotation speed to optimize CNT formation. By adjusting these parameters, the system achieves high mechanical strength without requiring complex multi-step procedures
3Productivity
If carbon source vapor is supplied to form CNT, then carbon nanotubes are synthesized, but vapor diffusion and condensation reduce efficiency
Solution Approach 1:
Rotating the base material dynamically during vapor supply prevents localized saturation and condensation. The continuous movement ensures uniform vapor distribution and reduces waste, improving both efficiency and substance utilization
Solution Approach 2:
The system employs controlled gas flow dynamics to deliver carbon source vapor efficiently. By optimizing vapor flow patterns and using the rotating base material to intercept vapor, the process minimizes diffusion losses and maximizes CNT formation efficiency
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 the efficient and cost-effective production of composite materials with CNT on the surface of base materials, enhancing electrical conductivity and mechanical strength, and allowing for the use of inexpensive carbon sources like camphor, resulting in high-yield, high-purity composite materials suitable for various industrial applications.
Implementation Method 1
chemical vapor deposition (CVD) synthesizes CNT by thermally decomposing a raw material containing carbon (carbon source)
Implementation Method 2
carbon source vapor is supplied to form the carbon nanotubes on the introduced base material
Data Source
AI summary
A process and an apparatus for producing a composite material utilize a rotatable hollow body that is inclined with an upstream side being higher than a downstream side. A reaction zone is defined within an elongated chamber in the hollow body. Protrusions inwardly extend from an inner peripheral wall of the hollow body adjacent to the reaction zone. Base material is input into the chamber via a base material introduction port and a carbon source vapor is input into the chamber via a carbon source supply port. A heater heats the reaction zone to a temperature at which carbon nanotubes form on the base material from the carbon source vapor. The protrusions catch base material disposed on the inner peripheral wall of the hollow body when the hollow body rotates and then drop the base material through the reaction zone so that the base material contacts the carbon source vapor.