Preparing method of aramid fiber/epoxy composite material, and MXene modification treating liquid

Abstract

The invention relates to a preparing method of an aramid fiber / epoxy composite material, and an MXene modification treating liquid. The method includes: (1) dipping aramid fiber into an acetone solution for 1-2 h; (2) dipping the aramid fiber into a nitric acid solution for 0.5-1 h to perform surface pretreatment; (3) washing the dipped aramid fiber with deionized water, filtering and drying; (4) dipping the aramid fiber into the MXene modification treating liquid, filtering and drying; and (5) preparing the aramid fiber and epoxy resin into a fiber plate, and curing and forming the composite material plate by utilization of a mould pressing curing method. The MXene modification treating liquid comprises following components by weight: 0.1-5 parts of an MXene compound, 15-25 parts of acetone, 46-68 parts of deionized water, 1-10 parts of isocyanate, 1-3 parts of urea and 1-2 parts of nitric acid. The MXene compound is adopted as a connecting bond, thus improving the interface toughness performance of the aramid fiber / epoxy composite material and improving the overall mechanical properties of the composite material.

Description

technical field [0001] The invention relates to a method for preparing a composite material, in particular to a method for preparing an aramid fiber / epoxy composite material. The invention also relates to an MXene modification treatment solution capable of improving the interface strength and toughness of the aramid fiber / epoxy composite material. Background technique [0002] Advanced resin-based composite materials have high specific strength, high specific stiffness, strong designability, good fatigue fracture resistance, corrosion resistance, good structural dimensional stability, and special electromagnetic properties and wave-absorbing stealth effects, which fully embodies the combination of structure and Distinctive features all-in-one. Therefore, it is widely used in aerospace, shipbuilding, chemical industry, construction, automobile manufacturing and other fields, and it also plays a vital role in the lightweight and functionalization of products. Aramid fiber is...

AI Technical Summary

Problems solved by technology

However, compared with carbon fiber, the research on the surface modification of aramid fiber is not mature and systematic.

In particular, there is a lack of research on the introduction of multiscale interfacial reinforcement phases into the interfacial structure of aramid fibers

Moreover, some modification treatment methods have great damage to the fiber and the formation of the interface effect is not ideal, which seriously affects the improvement of the overall performance of the aramid fiber / epoxy composite material, and restricts the development and application of the aramid fiber composite material.