Membrane-Forming Composition Flatness via Permeation Control
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Solution Overview
Problem
Existing membrane-forming compositions containing silicone and surface-modified microparticles face issues with uniform dispersion, leading to aggregation and poor flatness in gas separation membranes.
Innovation Solution
A membrane-forming composition comprising silicone, a solvent for silicone, and surface-modified microparticles, where the composition exhibits a controlled permeation speed through a porous substrate, as determined by the Lucas-Washburn equation, to ensure high flatness and no membrane defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If surface-modified microparticles are dispersed in silicone and solvent for silicone, then dispersibility is improved, but aggregation or sedimentation occurs leading to poor membrane flatness
Solution Approach 1:
The invention changes the chemical composition parameters of the solvent system by introducing specific additives (alcohol or ether compounds) to modify the interaction between microparticles and the solvent-silicone mixture. This parameter change prevents aggregation and sedimentation while maintaining uniform dispersion, thereby achieving both good dispersibility and membrane flatness simultaneously
2Ease of manufacture
If membrane-forming composition is applied onto porous substrate, then gas separation membrane is formed, but film-formability varies leading to inconsistent membrane characteristics
Solution Approach 1:
The invention introduces alcohol or ether compounds as intermediary substances that mediate between the membrane-forming composition and the porous substrate. These intermediaries control the permeation speed and film formation process, ensuring consistent membrane characteristics while maintaining ease of manufacture
3Manufacturing precision
If permeation speed through porous substrate is controlled, then membrane flatness and quality are improved, but compositional control complexity increases
Solution Approach 1:
The invention simplifies compositional control by establishing specific parameter ranges for alcohol or ether compounds (content: 0.1-10 mass% based on silicone content). Within this defined parameter range, the permeation speed is automatically controlled to produce high-quality membranes, reducing the complexity of compositional control while maintaining manufacturing precision
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 composition effectively forms membranes with high flatness and no defects, achieving optimal gas separation performance by controlling the permeation speed and ensuring uniform dispersion of microparticles.
Implementation Method 1
the membrane-forming composition exhibits a permeation speed through the porous substrate of more than 0 μm/s0.5 and 100 μm/s0.5 or less, the permeation speed being determined by the Lucas-Washburn equation
Data Source
AI summary
A membrane-forming composition which comprises a silicone, a solvent for dissolving the silicone, and microparticles and which is used for forming a membrane through application onto a porous substrate, wherein the membrane-forming composition exhibits a permeation speed through the porous substrate of more than 0 μm/s0.5 and 100 μm/s0.5 or less, the permeation speed being determined by the Lucas-Washburn equation.