A method for preparing high-performance composite materials by electrophoretic deposition of polymer micro-nano particles on carbon fiber surface

Abstract

The invention discloses a method for preparing a high-performance composite material by depositing polymer micro-nano particles on the surface of carbon fiber (CF) through electrophoresis. The methodcomprises the following steps: firstly, treating a CF base material by dopamine (DA): depositing and polymerizing the DA on the surface of the CF to form polydopamine to improve the cohesiveness of the polymer micro-nano particles on the surface of the CF; and then depositing the polymer micro-nano particles on the surface of the CF through electrophoresis to improve the interfacial property of the CF and a polymer base material, wherein polymer micro-nano particles have different shapes, particle size and composition, and the surfaces of the polymer micro-nano particles contain different functional groups. The polymer micro-nanoparticles with different composition, shapes and surface functional groups are deposited and adsorbed to the surface of polydopamine modified CF by an electrophoresis method, and interaction, such as physical mechanical interlocking and chemical bond connection, between the CF and the polymer base material is improved, so that the interfacial adhesion strengthis improved. TFBT test indicates that interfacial tensile strength is increased by 40 to 144 percent and IFSS is increased by 30 to 56 percent through monofilament droplet debonding method measurement.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a method for preparing high-performance composite materials by electrophoretic deposition of polymer micro-nano particles on the surface of carbon fibers. Background technique [0002] Carbon fiber (CF) reinforced composites are widely used in aerospace, rail transit, automobile and other fields due to their excellent performance. The key to determine the performance of CF reinforced polymer composites is the interfacial adhesion strength between CF and the polymer substrate. Due to the chemical inertness of the CF surface, low surface free energy, poor compatibility with the composite matrix, and low interfacial adhesion , resulting in poor interfacial shear strength and interlaminar shear strength of the composite material, which affects the mechanical properties and service life of the composite material [Pui-yan Hung, Kin-tak Lau, Bronwyn Fo...

AI Technical Summary

Problems solved by technology

The above-mentioned CF surface modification method uses a strong acid or a strong oxidant to treat the CF method, often forming defects on the CF surface, which reduces the tensile strength of the CF monofilament

In addition, most of the above modification methods need to go through multiple steps, and the reaction conditions of each step are harsh, such as high temperature and oxygen removal environment, long reaction time (several hours), etc.

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