High-Pressure Hydrogen Seal Composition for Swelling and Blister Control
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Solution Overview
Problem
Gas seal members in high-pressure hydrogen devices face issues with swelling destruction and blister destruction due to high-pressure hydrogen environments, where existing solutions do not adequately address durability under these conditions.
Innovation Solution
A gas seal member formed from a cross-linked elastomer composition incorporating fibrous carbon nanostructures, where the hydrogen diffusion coefficients of the cross-linked elastomer component and the composition satisfy the relationship 0.7 < D2/D1 < 1.0, reducing the occurrence of swelling and blister destruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional elastomer compositions are used in high-pressure hydrogen environments, then the gas seal member can be manufactured with standard materials, but the gas seal member suffers from swelling destruction and blister destruction reducing durability
Solution Approach 1:
The patent applies composite materials by combining elastomer components with fibrous carbon nanostructures (such as carbon nanotubes or graphene) to create a cross-linked product that simultaneously maintains elasticity and provides superior resistance to hydrogen-induced swelling and blistering. The fibrous carbon nanostructures form a reinforcing network within the elastomer matrix, preventing hydrogen penetration and structural degradation while maintaining the seal member's functional properties.
2Reliability
If the hydrogen diffusion coefficient is reduced to prevent blister destruction, then durability improves, but hydrogen permeation control becomes more difficult to optimize
Solution Approach 1:
The patent applies parameter changes by precisely controlling the hydrogen diffusion coefficient ratio (D2/D1) within the range of 0.7 to 1.0, where D2 is the diffusion coefficient of the cross-linked elastomer composition and D1 is the diffusion coefficient of the elastomer component. This optimized parameter range allows the material to maintain appropriate hydrogen permeation characteristics while providing sufficient resistance to blister destruction, balancing durability with functional hydrogen management.
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 solution effectively reduces the occurrence of swelling and blister destruction in gas seal members, enhancing their durability and performance in high-pressure hydrogen environments.
Implementation Method 1
a hydrogen diffusion coefficient D1 of a cross-linked product of an elastomer component including an elastomer and a hydrogen diffusion coefficient D2 of a cross-linked product of the elastomer composition satisfy the relationship 0.7
Data Source
AI summary
Disclosed is a gas seal member for high-pressure hydrogen device with sufficiently reduced occurrence of both swelling destruction and blister destruction. The gas seal member is formed of a cross-linked product of an elastomer composition which comprises an elastomer and fibrous carbon nanostructures, wherein a hydrogen diffusion coefficient D1 of a cross-linked product of an elastomer component including the elastomer and a hydrogen diffusion coefficient D2 of the cross-linked product of the elastomer composition satisfy the relationship 0.7<D2/D1<1.0.