Method for preparing carbon nanometer paper enhanced conductive polymer matrix composite material

Abstract

The invention provides a method for preparing a carbon nanometer paper enhanced conductive polymer matrix composite material, which is intended to solves a problem that integral mechanical properties and electroconductivity of a current carbon nanotube composite material cannot completely reaches engineering application requirements. Multi-walled carbon nanotubes or single-walled carbon nanotubes and graphene oxide are dispersed in a plasma aqueous solution under action of supersonic waves by an anionic surfactant, after high speed centrifugation, a supernatant liquid of the carbon nanotubes and graphene oxide solution is obtained, and flexible carbon nanometer paper with thickness of 10-100mum can be prepared as an enhanced material by a vacuum filtration method. The carbon nanometer paper enhanced conductive polymer matrix composite materials can be prepared by an RTM forming or vacuum bag method, and conductivity can be raised by raising the content of the carbon nanotubes and dispersion uniformity of carbon nanotube grids in the composite material, wherein the conductivity of the nanocomposite can be raised in several orders of magnitude, and can reach 1-200S / m, thereby making the polymer matrix composite materials go into a semiconductor conductive material field from an insulator.

Description

technical field [0001] The invention relates to a method for preparing a conductive composite material, in particular to a method for preparing a conductive polymer-based composite material reinforced by carbon nano paper. Used in the field of semiconductor conductive materials. Background technique [0002] Carbon nanotubes (Carbon nanotubes, CNTS) is a hollow tubular fiber structure, its diameter is generally several nanometers to tens of nanometers, and its length can reach several micrometers or even several millimeters. The most promising additives for conductive polymer-based composites. However, the intermolecular force of carbon nanotubes is strong, and when they are directly dispersed in the polymer matrix, they tend to agglomerate. At the same time, the huge specific surface area of ​​carbon nanotubes will also lead to an increase in the viscosity of the polymer matrix, making it difficult to form composite materials. affect the overall mechanical properties of c...

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Problems solved by technology

However, the intermolecular force of carbon nanotubes is strong, and when they are directly dispersed in the polymer matrix, they tend to agglomerate. At the same time, the huge specific surface area of ​​carbon nanotubes will also lead to an increase in the viscosity of the polymer matrix, making it difficult to form composite materials. Affect the overall mechanical properties of composite materials

Moreover, the conductivity of the composite material is mainly determined by the content and uniformity of the carbon nanotubes. In order to obtain an effective carbon nanotube electrical conduction network, methods such as shear force stirring, three-roll stirring and ultrasonic dispersion are usually used, but the carbon nanotubes The additive content of the tube is limited, and the electrical conductivity of the prepared conductive composite cannot fully meet the requirements of engineering applications.

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