Micro-channeled Material Fabrication via Atmospheric Pyrolysis
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Solution Overview
Problem
Existing methods for producing micro-channeled materials require a strong vacuum, leading to complex and costly equipment maintenance, as well as issues with vacuum pump contamination and surface fouling, which complicates the fabrication process.
Innovation Solution
A method involving the consolidation of metal-plated polymer fibers, heated in an inert gas at atmospheric pressure to pyrolyze the polymer fibers, removing the polymer substrate without a vacuum, and using a carbonaceous residue to hold the nickel micro-channels together until sintering, allowing for easier manipulation and more flexible decomposition reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If a strong vacuum is used to remove polymer substrate during micro-channel fabrication, then the polymer can be effectively pyrolyzed and removed, but the equipment becomes complex and costly due to vacuum pump contamination and surface fouling
Solution Approach 1:
The patent replaces the vacuum environment with an inert gas atmosphere (such as nitrogen or argon) during the pyrolysis process. This allows the polymer substrate to be effectively removed through thermal decomposition while avoiding the contamination and fouling problems associated with vacuum pumps and surfaces. The inert atmosphere prevents unwanted chemical reactions and enables complete polymer removal without requiring complex vacuum equipment.
2Loss of substance
If a strong vacuum is used for pyrolysis, then polymer removal is effective, but filtration systems and vacuum seal maintenance become elaborate and difficult
Solution Approach 1:
By conducting pyrolysis in an inert gas atmosphere rather than vacuum, the patent eliminates the need for elaborate filtration systems and vacuum seal maintenance. The inert gas can be easily introduced and controlled, allowing for simple and effective polymer decomposition while maintaining process simplicity and ease of manufacture.
3Temperature
If carbon is deposited on heating elements during vacuum pyrolysis, then polymer decomposition occurs, but the heating elements experience fouling leading to electric arcing and failure
Solution Approach 1:
The inert gas atmosphere prevents carbon deposition on heating elements by creating an environment that does not favor carbonization reactions on surfaces. This maintains heating element reliability and prevents electric arcing and failure, while still allowing the necessary pyrolysis temperature to be achieved for effective polymer removal.
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 simplifies and economizes the fabrication process by eliminating vacuum requirements, facilitating easier handling and more flexible gas composition for tailored decomposition reactions, and reduces the risk of equipment failure due to surface fouling.
Implementation Method 1
heating the bundle to a first temperature in the presence of an inert first gas at atmospheric pressure, thereby pyrolyzing the polymer fibers
Implementation Method 2
consolidating the metal-plated polymer fibers into a bundle
Data Source
AI summary
A micro-channeled material is fabricated from a bundle of metal-plated polymer fibers by a process wherein the polymer fibers are heated to a first temperature and pyrolyzed in the presence of an inert gas at atmospheric pressure.