Hydrophilized Material Surface Roughness for Gas-Liquid Contact
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Solution Overview
Problem
Existing gas-liquid contact technologies face challenges in maintaining satisfactory wettability, as chemical treatments provide temporary improvements while physical treatments offer persistent but limited wettability enhancements, requiring frequent reprocessing and replacement of packing materials in gas separation apparatuses.
Innovation Solution
A hydrophilized material with specific surface roughness conditions (arithmetic mean roughness of 0.3 μm to 1.0 μm and mean width of roughness profile elements of 0.1 mm or less) is developed, suitable for both metal and plastic materials, which enhances wettability through physical surface roughening treatments, reducing the need for frequent maintenance and replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical treatment (UV treatment, plasma treatment) is used to improve wettability, then wettability is improved, but the improvement has low persistence and requires repeated surface treatment
Solution Approach 1:
The patent changes the physical parameters of the surface by controlling arithmetic mean roughness (Ra) to 0.3-1.0 μm and mean width of roughness profile elements (Rsm) to 0.1 mm or less. This physical parameter modification creates persistent wettability enhancement without requiring repeated chemical treatments, resolving the contradiction between initial wettability improvement and long-term persistence.
2Duration of action of stationary object
If physical treatment (blasting, dull roll processing) is used to roughen surface, then wettability improvement is persistent, but the degree of improvement is not as remarkable and requires increase of several percent to several tens percent in surface area
Solution Approach 1:
The patent optimizes the physical treatment parameters to achieve Ra of 0.3-1.0 μm and Rsm of 0.1 mm or less. This specific parameter range creates a balance where the surface roughness provides remarkable wettability improvement while maintaining persistence, avoiding the need for excessive surface area increase required by conventional physical treatments.
Solution Approach 2:
The patent creates localized surface roughness features with specific dimensional characteristics (Ra and Rsm values) that concentrate the wettability enhancement effect in controlled regions, achieving remarkable improvement without requiring uniform excessive roughening across the entire surface.
3Reliability
If packing materials are replaced frequently to maintain wettability, then satisfactory wettability is maintained, but maintenance cost and operational time increase
Solution Approach 1:
By establishing the optimal surface roughness parameters (Ra: 0.3-1.0 μm, Rsm: 0.1 mm or less), the patent creates a self-lasting wettability enhancement that eliminates the need for frequent packing material replacement, thereby reducing maintenance time and operational losses while maintaining reliable wettability performance.
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 hydrophilized material achieves persistent and improved wettability, reducing the necessity for frequent maintenance and replacement of packing materials in gas-liquid contact apparatuses, enhancing operational efficiency and reducing costs in gas separation processes.
Implementation Method 1
a surface provided with surface roughness in which arithmetic mean roughness is 0.3 μm or more and 1.0 μm or less and a mean width of roughness profile elements is 0.1 mm or less
Implementation Method 2
hydrophilized material useful for mass transfer between gas and liquid in gas-liquid contact
Data Source
AI summary
A hydrophilized material has a surface provided with surface roughness that arithmetic mean roughness is 0.3 μm to 1.0 μm and mean width of roughness profile elements is 0.1 mm or less. A hydrophilized member that contacts a liquid is at least partially made of the hydrophilized material. The hydrophilized member is applicable to a gas-liquid contact apparatus having a gas-liquid contact section, a liquid supply system, and a gas supply system, to constitute the gas-liquid contact section as a packing element. Wettability imparted due to the surface roughness is exhibited continuously.