3D Nano-Shell Micro Pre-Concentrator for Uniform Gas Desorption
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Solution Overview
Problem
Conventional micro pre-concentrators face challenges in efficiently concentrating gaseous components with low concentration due to random porous structures that hinder smooth gas flow and uniform heating, leading to reduced concentration performance.
Innovation Solution
A micro pre-concentrator with a 3D nano-shell composite structure, comprising a ceramic-polymer composite with ordered pores and a thin film support, is developed, featuring a large surface area and uniform heat transfer, enhancing gas absorption and desorption efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a random porous structure with micron scale is used, then the specific surface area is large, but gaseous molecules cannot flow smoothly and heat cannot be provided uniformly
Solution Approach 1:
The patent employs a porous polymer material with controlled pore structure to create the coating layer. The porous structure provides large specific surface area for gas absorption while maintaining interconnected pores that enable smooth gas flow throughout the material, resolving the contradiction between surface area and flow smoothness.
Solution Approach 2:
The patent creates a composite structure by coating porous polymer material onto the inner surface of the micro-column. This composite approach combines the large surface area advantage of porous materials with the structural integrity needed for uniform heat distribution, allowing both high surface area and smooth gas flow to coexist.
2Area of stationary object
If a random porous structure with micron scale is used, then the specific surface area is large, but heat cannot be provided uniformly leading to desorption failure
Solution Approach 1:
The porous polymer coating layer with its interconnected pore structure enables uniform heat distribution throughout the material. The porous structure allows heat to penetrate evenly across the entire surface area, preventing localized hot or cold spots that would cause desorption failure, while maintaining the large surface area needed for effective gas concentration.
Solution Approach 2:
The patent applies a coating layer with specific local properties (porous polymer material) to the inner surface of the micro-column. This localized application ensures that the heat transfer properties are optimized at the gas-contact interface, providing uniform heat distribution exactly where needed for consistent desorption performance across the entire surface area.
3Productivity
If a conventional porous structure is used, then absorption/desorption efficiency is maximized, but desorption failure occurs due to non-uniform heating
Solution Approach 1:
The porous polymer coating layer maintains high absorption/desorption efficiency through its large surface area and porous structure, while simultaneously ensuring uniform heat distribution throughout the material. This uniform heating prevents localized desorption failures, thereby improving the reliability and consistency of the desorption process without sacrificing productivity.
Solution Approach 2:
The composite structure of porous polymer coating on the micro-column interior combines the high surface area benefits for efficient absorption/desorption with the thermal properties needed for uniform heating. This composite approach resolves the contradiction between productivity and reliability by ensuring both efficient mass transfer and consistent thermal treatment across the entire adsorbent material.
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 3D nano-shell composite structure increases the adsorption capacity and concentration performance by allowing uniform and rapid heat transfer, enabling high-density gas release and improved detection of volatile organic compounds.
Implementation Method 1
The 3D nano-shell composite structure increases the adsorption capacity and concentration performance by allowing uniform and rapid heat transfer
Implementation Method 2
a 3D nano-shell composite disposed in the trench and having pores that are ordered and connected to each other... enhancing gas absorption and desorption efficiency
Implementation Method 3
The micro pre-concentrator further includes a heating member disposed under the base substrate
Data Source
AI summary
A disclosed micro pre-concentrator includes a base substrate having a trench, and a 3D nano-shell composite disposed in the trench and having pores that are ordered and connected to each other. The 3D nano-shell composite includes a 3D nano-shell support defined by a thin film extending three-dimensionally and a polymeric layer formed along a surface of the 3D nano-shell support. The micro pre-concentrator may increase adsorption amount of gas. In addition, since it may be uniformly heated in a short time, it is possible to release gas at a high density in a short time.