Preparation method of fiber surface sizing agent based on carbon nanotube/graphene oxide/POSS (Polysilsesquioxane) monomer

Abstract

The invention provides a preparation method of a fiber surface sizing agent based on a carbon nanotube / graphene oxide / POSS (Polysilsesquioxane) monomer, which mainly solves problems of difficulty in molding a composite material, poor integral mechanical property and high cost in the traditional technology of improving the interface performance of the composite material by using a nanomaterial. According to the invention, the carbon nanotube, the graphene oxide and the POSS monomer are introduced into the formula of the sizing agent; and by means of the sizing agent, the carbon nanotube, the graphene oxide and the POSS monomer are coated on the surface of a fiber; therefore, the interface performance of the fiber and a matrix in a fiber reinforced composite material is improved by sufficiently using the surface characteristics of the nanomaterial; meanwhile, problems that a molding process is affected and the nanomaterial adding quantity is limited because the nanomaterial is directly added to resins are also solved. According to the invention, the prepared fiber surface sizing agent can be used as a nanomolecule coupling agent and obtains stronger binding capacity with the fiber surface. In the using process of the sizing agent, it is unnecessary to remove the original commercial sizing agent, and the fiber can be sized by using a water immersion method. The preparation method of the fiber surface sizing agent based on the carbon nanotube / graphene oxide / POSS monomer, provided by the invention, has the advantages of comparative easiness for molding the composite material, good integral mechanical property and low cost.

Description

technical field [0001] The invention relates to the field of a composite material sizing agent, in particular to a preparation method of a fiber surface sizing agent based on carbon nanotube / graphene oxide / POSS monomer. Background technique [0002] The performance of fiber-reinforced composites is significantly affected by the interface properties between the fiber and the matrix. Good interfacial bonding can ensure the effective transfer of load from the matrix to the reinforcement, reduce stress concentration and improve mechanical properties. Using carbon nanotubes, graphene and other nanomaterials to improve the fiber / matrix interface of fiber-reinforced composites has become a research hotspot at home and abroad. [0003] However, the intermolecular force of carbon nanotubes is strong, and when the amount of dispersion in the polymer matrix is ​​large, they tend to agglomerate. At the same time, the huge specific surface area of ​​carbon nanotubes will also increase th...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the above problems, and mainly solve the problems of difficult molding, poor overall mechanical properties and high cost of composite materials in the prior art

The present invention introduces carbon nanotubes, graphene oxide, and POSS monomer coupling agents into the sizing agent formula, uses the sizing agent to coat carbon nanotubes, graphene oxide, and POSS monomers on the fiber surface, and makes full use of the advantages of the above-mentioned nanomaterials The surface properties improve the interfacial properties between the fiber and the matrix in fiber reinforced composite materials, and also solve the problem of directly adding nanomaterials to the resin, which affects the molding process and the limited amount of nanomaterials added