Sizing agent for inorganic fiber, inorganic fiber and production method therefor, and composite material
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Solution Overview
Problem
The adhesive property improvement of inorganic fibers with respect to base materials in composite materials using existing carbon fiber sizing agents is insufficient.
Innovation Solution
An inorganic fiber sizing agent containing carbon nanostructures such as carbon nanotubes and carbon nanofibers, combined with a resin and a surfactant, is applied to enhance the adhesive properties by forming an anchor effect and preventing detachment from the fiber surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional polymer-based sizing agent is used to improve adhesive property, then the adhesive property is partially improved, but the adhesive property improvement is insufficient
Solution Approach 1:
The sizing agent uses a composite structure combining carbon nanotubes (or carbon nanofibers) with polymer matrix resin. The carbon nanostructures provide exceptional mechanical strength and adhesive bonding capability, while the polymer matrix provides the necessary flexibility and processability. This composite approach resolves the contradiction by achieving sufficient adhesive property improvement that conventional single-material sizing agents cannot attain.
Solution Approach 2:
The invention changes the fundamental parameter of the sizing agent composition by introducing carbon nanostructures with unique physical and chemical properties. The carbon nanotubes/nanofibers have high aspect ratio, large surface area, and excellent mechanical properties that fundamentally enhance adhesive performance compared to conventional polymers, resolving the insufficiency issue.
2Strength
If carbon nanotubes are added to improve adhesive property, then adhesive property and bundling property are improved, but the complexity of the sizing agent composition increases
Solution Approach 1:
The invention merges carbon nanotubes (or carbon nanofibers) with polymer matrix resin into a unified sizing agent composition. The carbon nanostructures and polymer matrix work synergistically, where the polymer matrix distributes and anchors the carbon nanostructures while the carbon nanostructures provide reinforcement and adhesive enhancement. This merging approach improves adhesive and bundling properties while managing composition complexity through functional integration.
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 proposed solution significantly improves the adhesive property, bundling property, and process efficiency of inorganic fibers within composite materials, ensuring strong bonding with the base material and maintaining the carbon nanostructure's presence on the fiber.
Implementation Method 1
a treatment in which a sizing agent is adhered to the inorganic fibers is performed to improve adhesive property of the interface between the inorganic fibers
Implementation Method 2
contains a carbon nanostructure, such as a carbon nanotube, and a resin and a surfactant
Data Source
AI summary
An inorganic fiber sizing agent that contains at least one carbon nanostructure selected from the group consisting of carbon nanotubes and carbon nanofibers, a resin, and a surfactant. If the total content of a nonvolatile content of the resin and the surfactant is taken as 100 parts by mass, the inorganic fiber sizing agent contains the surfactant at a ratio of 2 to 50 parts by mass.