Experimental Implementation of a New Composite Fabrication Method: Exposing Bare Fibers on the Composite Surface by the Soft Layer Method

Overview

This article presents a protocol for fabricating fiber-reinforced composites with bare fibers exposed on the surface without the need for surface treatments. The technique enhances the electrical conductivity and mechanical properties of the composites while maintaining high productivity.

Key Study Components

Area of Science

• Composite materials
• Electrical conductivity
• Mechanical properties

Background

• Traditional surface treatments for composites can be expensive and inefficient.
• Exposing bare fibers can significantly improve composite performance.
• High fiber volume fractions are essential for optimal properties.
• Unidirectional carbon fiber fabrics are commonly used in composite fabrication.

Purpose of Study

• To develop a method for exposing bare fibers during composite fabrication.
• To eliminate the need for post-fabrication surface treatments.
• To enhance the electrical and mechanical properties of the composites.

Methods Used

• Preparation of unidirectional carbon fiber fabric pre-impregnated with epoxy.
• Stacking squares of prepreg with a fiber volume fraction of 50 to 60%.
• Arranging fiber orientations to prevent laminate splitting.
• Cleansing fabric with acetone or ethanol before use.

Main Results

• Successful exposure of bare fibers on the composite surface.
• Improved electrical conductivity in the through-thickness direction.
• Enhanced mechanical properties of the composite material.
• High productivity achieved in the fabrication process.

Conclusions

• The proposed method is effective for enhancing composite performance.
• It offers a cost-effective alternative to traditional surface treatments.
• Further research could optimize the process for various applications.

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