Conductive Sizing for Carbon Fibers via Graphene Oxide
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Solution Overview
Problem
Carbon fiber-reinforced resin composites used in wind energy applications exhibit poor through-thickness transverse electrical conductivity, leading to potential delamination or incineration during lightning strikes due to anisotropic conductivity, and existing methods to enhance conductivity are either inefficient or costly.
Innovation Solution
Incorporating graphene oxide nanoparticles into the sizing composition of carbon fibers, which are then coated and dried to form electrically conductive sized fibers, enhancing the transverse electrical conductivity of the composite materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sizing composition is used on carbon fibers, then the fiber surface is protected and processable, but the through-thickness transverse electrical conductivity remains poor
Solution Approach 1:
The invention changes the electrical conductivity parameter of the sizing composition by incorporating graphene oxide nanoparticles, transforming it from an electrically insulating coating to an electrically conductive one. This allows the sizing to simultaneously provide surface protection and enhance through-thickness electrical conductivity, resolving the contradiction between reliability under lightning strike conditions and manufacturing simplicity
Solution Approach 2:
The invention creates a composite sizing material by combining conventional sizing compounds with graphene oxide nanoparticles. This composite structure integrates the protective functions of traditional sizing with the electrical conductivity of graphene oxide, enabling both surface protection and improved lightning strike resistance without complicating the manufacturing process
2Reliability
If conductive particles are added to enhance transverse electrical conductivity, then lightning strike resistance improves, but manufacturing cost and process complexity increase
Solution Approach 1:
The graphene oxide nanoparticle-containing sizing composition serves multiple functions simultaneously: it provides surface protection like conventional sizing, enhances through-thickness electrical conductivity for lightning strike protection, and maintains a straightforward application process. This multi-functionality resolves the contradiction between improved reliability and reduced complexity
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 method significantly improves the transverse electrical conductivity of carbon fiber-reinforced resin composites, making them more resistant to lightning strikes and maintaining a stable, low-cost manufacturing process with minimal environmental impact.
Implementation Method 1
the sizing composition includes at least one sizing compound and a plurality of graphene oxide nanoparticles
Implementation Method 2
drying the coated fiber tow to form an electrically conductive sized fiber
Data Source
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AI summary
Disclosed herein is an electrically conductive sized fiber including a fiber and a sizing composition adhered to a surface of the fiber, wherein the sizing composition includes at least one sizing compound and a plurality of graphene oxide nanoparticles, The present disclosure also discloses fiber-reinforced resin composites, articles including fiber-reinforced resin composites and methods of making such electrically conductive sized fiber and articles therefrom.