Tensile property sample preparation device of ultra-high modulus carbon fiber multifilament and sample preparation method

Abstract

The invention relates to a tensile property sample preparation device of an ultra-high modulus carbon fiber multifilament and a sample preparation method, and belongs to the technical field of material property testing. The tensile property sample preparation device of the ultra-high modulus carbon fiber multifilament includes a precision control system, an automatic glue dispensing system and anauxiliary positioning system. The sample preparation method comprises the following steps of: placing a pre-wound ultra-high modulus carbon fiber multifilament frame on a sample preparation glue dispensing device, and automatically adding a glue solution through the precision control system; then placing the glue-dipped carbon fiber multifilament in an oven for curing; and pasting a reinforcing sheet for tensile testing. The invention solves the problem of high damage and brittle fracture of fibers encountered during a manual glue-dipping process of ultra-high modulus carbon fibers, and prepares multifilament tensile sample strips with smooth appearance. The tensile property sample preparation device of the ultra-high modulus carbon fiber multifilament and the sample preparation method disclosed by the invention have important popularization and application prospects in the engineering development and production of the ultra-high modulus carbon fibers and composite materials thereof, and high thermal conductivity mesophase pitch-based carbon fibers and composite materials thereof.

Description

technical field [0001] The invention relates to an ultra-high modulus carbon fiber multifilament tensile performance sample preparation device and a sample preparation method, belonging to the technical field of material preparation and performance testing. Background technique [0002] Ultra-high modulus carbon fiber (≥500GPa) has excellent characteristics such as high specific modulus, high specific strength, and good dimensional stability. It is an irreplaceable core material for the main structure, functional structure, protective structure and auxiliary structure of spacecraft. The development trend of aerospace materials. Ultra-high modulus carbon fibers include polyacrylonitrile-based carbon fibers with extremely high tensile elastic modulus and mesophase pitch-based carbon fibers with high thermal conductivity, such as the series of high-strength and high-modulus carbon fibers such as M55J and M65J from Toray Corporation of Japan and Cytec from the United States. Th...

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Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a sample preparation device and a sample preparation method for the tensile properties of low-damage ultra-high modulus carbon fiber multifilament, the sample preparation device can effectively solve the problem of ultra-high During the production process of modulus carbon fiber multifilament tensile specimens, there were technical problems such as low tensile strength test values ​​and large dispersion caused by a large amount of fiber damage. The prepared multifilament tensile specimens had a smooth appearance and stable tensile test results. Suitable for high-strength high-modulus polyacrylonitrile carbon fibers with ultra-high modulus and high thermal conductivity mesophase pitch-based carbon fibers

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