Partially Exfoliated Graphite in Thermosetting Resin
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Solution Overview
Problem
Conventional gas barrier materials with functional graphene in thermosetting resins exhibit insufficient gas barrier properties due to graphene aggregation, leading to poor dispersibility and uneven film formation, which reduces their applicability and effectiveness.
Innovation Solution
Incorporating partially exfoliated graphite, modified with a resin, into the thermosetting resin composition to enhance dispersibility and gas barrier properties, using a thermosetting resin as the matrix with a carbon material content of 0.1-10 mass % and a BET specific surface area of 25-2500 m2/g, which improves the gas barrier properties and flexibility of the material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thin carbon material such as graphene is added to thermosetting resin, then gas barrier properties are improved, but the carbon material aggregates and dispersibility deteriorates
Solution Approach 1:
The patent segments the carbon material into platelet-shaped particles with controlled dimensions (length 1-100 μm, thickness 0.1-10 μm) rather than using continuous graphene sheets. This segmentation prevents aggregation while maintaining gas barrier properties, as the discrete platelets can be more evenly distributed in the thermosetting resin matrix.
Solution Approach 2:
The patent changes the physical parameters of the carbon material by controlling the degree of exfoliation of graphite to create platelet-shaped particles with specific size ranges. By adjusting the exfoliation degree and particle dimensions, the patent achieves optimal balance between gas barrier performance and dispersibility in the resin matrix.
2Ease of operation
If liquid thermosetting resin containing carbon material is used, then applicability is improved, but carbon material aggregation increases and film formation uniformity deteriorates
Solution Approach 1:
The platelet-shaped carbon particles are segmented into small discrete units that can be more easily and uniformly distributed in the liquid resin during application. This segmentation prevents the formation of large aggregates that would cause uneven film formation, while the liquid state of the resin allows for good applicability.
Solution Approach 2:
The patent controls the size parameters of carbon particles (length 1-100 μm, thickness 0.1-10 μm) to optimize both applicability and film formation uniformity. The specific size range ensures particles are small enough to disperse uniformly but large enough to maintain structural integrity during application.
3Reliability
If carbon material content is increased to improve gas barrier properties, then barrier performance is enhanced, but material flexibility deteriorates
Solution Approach 1:
The platelet-shaped carbon particles are segmented into discrete units with aspect ratios optimized to provide gas barrier properties at lower concentrations. The segmented structure allows particles to orient and stack in a way that creates effective diffusion paths for gases while minimizing impact on matrix flexibility.
Solution Approach 2:
The patent optimizes the concentration of carbon material (0.1-10 mass %) and the aspect ratio of platelet particles (length/thickness) to achieve the desired balance. By controlling these parameters, the patent obtains sufficient gas barrier properties while maintaining material flexibility for practical applications.
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 use of partially exfoliated graphite in the thermosetting resin composition significantly enhances gas barrier properties, including water vapor and oxygen suppression, while maintaining material flexibility and reducing the need for higher carbon material content, thus improving the applicability and effectiveness of the gas barrier material.
Implementation Method 1
a gas barrier material capable of suppressing the transmission of water vapor or oxygen has been used
Implementation Method 2
the carbon material tends to aggregate in the thermosetting resin and thus the carbon material cannot be sufficiently dispersed
Data Source
AI summary
Provided is a gas barrier material having superior gas barrier properties. This gas barrier material 1 comprises a matrix resin 2, and a carbon material 3 disposed in the matrix resin 2, wherein the carbon material 3 contains a partially exfoliated graphite having a structure in which graphite is partially exfoliated.