Preparation method for silane coupling agent modified CB/CFDSF/AG-80 epoxy resin composite material

Abstract

The invention relates to a preparation method for a silane coupling agent modified CB / CFDSF / AG-80 epoxy resin composite material. The method mainly comprises the following steps: 1) adopting a silane coupling agent for modifying carbon black (CB); 2) performing surface cleaning and surface modification on carbon fiber double-layer spaced fiber (CFDSF); 3) preparing a modifying CB / AG-80 epoxy resin system solution for pouring and thermosetting CFDSF. The silane coupling agent modified CB / CFDSF / AG-80 epoxy resin composite material with excellent conductivity, thermodynamic property and less dosage of conductive material is prepared according to the preparation steps and the specific technical parameters of the invention; the composite material is capable of modifying the uniform distribution of carbon black in substrate; the composite material has high conductivity stability and can be widely applied to the fields, such as electronics, electrostatic protection, electromagnetic shielding and microwave absorption.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a silane coupling agent modified CB / CFDSF (carbon fiber double-layer spacer fabric) / AG-80 epoxy resin composite material and a preparation method thereof. Background technique [0002] With the rapid development of the electronic technology industry, the demand for functional composite materials with good electrical conductivity is also increasing. Since the conductive composite material has the characteristics of light weight, no rust, good dimensional stability, and adjustable conductivity in a wide range, it is also easy to process into various complex shapes and easy to mass industrial production, so it is used in electrostatic protection. , electromagnetic shielding, microwave absorption and other fields are widely used. At present, the common conductive composite materials usually use polymer as the matrix, and at the same time add conductive substances such as carbon-ba...

AI Technical Summary

Problems solved by technology

[0014] Chinese patent application (201310413596.3) discloses a modified carbon fiber / epoxy resin composite material and a preparation method thereof. The preparation method includes the steps of mixing graphene with liquid epoxy resin to obtain a first mixture. In the first mixture Add a curing agent capable of cross-linking and curing the liquid epoxy resin to obtain the second mixture, and use the carbon fiber and the second mixture as raw materials to make the liquid epoxy resin cross-link and cure to form a modified compound integrated with the carbon fiber. The carbon fiber / epoxy resin composite material has a simple process and high production efficiency, but its strength and other mechanical properties are insufficient

[0015] From the above literature, it is easy to know that the difference in the type and content of CB will greatly affect the performance of the composite material matrix, and then have a great impact on the physical properties of the composite material system.

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