Low-Temperature Plasma Coating for Particulate Matter Durability
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Solution Overview
Problem
Existing methods for plasma coating of particulate matter often result in coatings that are not durable enough for extended use and suffer from inefficient use of precursor materials, leading to waste.
Innovation Solution
A low-temperature atmospheric pressure plasma coating method where a precursor is inserted into a plasma jet, creating an excited precursor that is then used to coat particulate matter, ensuring better adhesion and reduced precursor waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-temperature vacuum plasma or atmospheric pressure plasma is used to coat particles, then the coating can be applied to particulate matter, but the coating durability is insufficient for extended use
Solution Approach 1:
The invention changes the temperature parameter from high-temperature plasma to low-temperature plasma (below 100°C), and changes the pressure parameter from vacuum to atmospheric pressure. These parameter changes enable the precursor to be inserted into the plasma jet without decomposition, forming a durable coating that maintains functionality for extended periods.
Solution Approach 2:
The invention introduces a precursor as an intermediary substance that is inserted into the plasma jet. The precursor reacts with the plasma to form excited precursor species that deposit as a durable coating on the particles. This intermediary approach solves the problem of direct plasma coating durability issues.
2Reliability
If conventional plasma coating methods are used, then coating can be achieved, but precursor material is wasted and adhesion is insufficient
Solution Approach 1:
By changing to low-temperature plasma conditions, the precursor remains stable during insertion and only decomposes where needed on the particle surface. This controlled decomposition improves adhesion while reducing waste, as the precursor reacts efficiently with the particle surface rather than being lost to uncontrolled decomposition in high-temperature plasma.
Solution Approach 2:
The precursor is inserted into the plasma jet before contact with the particles, allowing it to be activated and form excited precursor species in advance. This preliminary activation ensures that the precursor is ready to adhere strongly to the particle surface, improving adhesion and reducing waste from unreacted precursor.
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 method achieves a durable and homogeneous coating on particulate matter, enhancing its functionality and extending its operational lifetime while minimizing precursor waste.
Implementation Method 1
providing a low-temperature atmospheric plasma jet from a plasma gas
Implementation Method 2
inserting a precursor into the plasma jet, thereby obtaining a plasma coating flow comprising an excited precursor
Implementation Method 3
The particulate matter then is subjected to excited precursors which can better attach to the surface of the particles
Data Source
AI summary
A plasma coating method for coating particulate matter, including the steps of: a) providing a low-temperature atmospheric plasma jet from a plasma gas outside of the reaction chamber; b) inserting a precursor into the plasma jet, thereby obtaining a plasma coating flow comprising an excited precursor, followed by injecting the plasma coating flow comprising the excited precursor in the reaction chamber, and c) subjecting particulate matter to said plasma coating flow comprising said excited precursor, thereby obtaining particulate matter comprising an at least partial coating. a coating reactor apparatus and a system involve the plasma coating method.