Protective-Layer Gas Separation Membrane for Abrasion Resistance

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Solution Overview

Problem

Gas separation membranes with resin layers containing siloxane bonds often suffer from low initial gas permeation performance, abrasion resistance, and bending resistance due to brittleness and defects caused by surface oxidation treatment and handling processes.

Innovation Solution

A protective-layer-covered gas separation membrane is developed, featuring a resin layer with a siloxane bond, a protective layer, and a porous layer, which improves initial gas permeation performance and enhances abrasion and bending resistance by reducing brittleness and preventing accidental damage during handling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If surface oxidation treatment is performed on the resin layer to improve gas separation performance, then gas separation selectivity is improved, but the resin layer becomes brittle and develops defects, reducing initial gas permeation performance and abrasion resistance

Engineering Contradiction:

Improvegas separation selectivityVSAvoidinitial gas permeation performance

Core Design Contradiction:

Manufacturing precisionVSReliability

Solution Approach 1:

A protective layer is introduced as an intermediary between the resin layer and the external environment. This protective layer prevents direct contact and mechanical damage to the brittle resin layer while allowing gas permeation to occur through its porous structure, thus maintaining both gas separation selectivity and initial gas permeation performance.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The protective layer is designed with a porous structure that allows gas molecules to pass through while providing mechanical protection to the underlying resin layer. The porosity ensures that gas permeation performance is maintained, while the structural integrity of the protective layer prevents defects from forming in the resin layer.

Inventive Principle:

Principle #31Porous materials

2Productivity

If the resin layer is made thinner to improve gas permeability, then gas permeation performance is improved, but abrasion resistance and bending resistance deteriorate

Engineering Contradiction:

Improvegas permeation performanceVSAvoidabrasion resistance

Core Design Contradiction:

ProductivityVSStrength

Solution Approach 1:

The membrane structure is segmented into multiple functional layers: a thin resin layer for gas separation and permeation, and a separate protective layer for mechanical strength. This segmentation allows each layer to optimize its specific function without compromising the other, achieving both high gas permeation performance and good abrasion resistance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The membrane is constructed as a composite structure combining the resin layer (for gas separation) with the protective layer (for mechanical protection). This composite approach allows the thin resin layer to maintain high gas permeability while the protective layer provides the necessary abrasion and bending resistance.

Inventive Principle:

Principle #40Composite materials

3Ease of operation

If handling and winding processes are performed to form the membrane module, then the membrane can be used in practical applications, but defects are generated in the resin layer, reducing gas permeation performance

Engineering Contradiction:

Improvemembrane module formationVSAvoidgas permeation performance

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The protective layer is applied to the resin layer before the membrane is wound and formed into a module. This beforehand protection cushions the brittle resin layer against mechanical damage during handling and winding operations, preventing defect formation while allowing practical module formation to proceed.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 membrane achieves good initial gas permeation, abrasion resistance, and bending resistance without compromising gas permeability, as the protective and porous layers mitigate defects and stress, providing a durable and effective separation solution.

Implementation Method 1

a porous layer on the protective layer... good initial gas permeation performance

Methodology Applied

Scientific EffectDiffusion: Diffusion

Implementation Method 2

the protective and porous layers mitigate defects and stress, providing a durable and effective separation solution

Methodology Applied

Scientific EffectPhysical containment: Physical Containment

Data Source

PatentUS10906008B2Protective-layer-covered gas separation membrane, method for producing protective-layer-covered gas separation membrane, gas separation membrane module, and gas separation apparatus

Publication Date: 2021.02.02 YESTAR ADVANCED MATERIALS (HK) CO LTD

AI summary

A protective-layer-covered gas separation membrane has a gas separation membrane that satisfies specific conditions such as having a resin layer containing a compound having a siloxane bond, a protective layer located on the resin layer containing a compound having a siloxane bond of the gas separation membrane, and a porous layer on the protective layer. The protective-layer-covered gas separation membrane is produced. A gas separation membrane module and a gas separation apparatus have the protective-layer-covered gas separation membrane.