Polyolefin-based conductive master batch based on carbon nano tube and graphene compounded system and preparation method thereof

Abstract

The invention provides a polyolefin-based conductive master batch based on a carbon nano tube and graphene compounded system and a preparation method thereof. The preparation method comprises the following steps: firstly respectively uniformly dispersing carbon nano tubes and graphene into a volatile inert solvent, respectively treating for 1 hour by virtue of an ultrasonic treatment device, thenstirring the treated dispersion liquid with raw materials in a high-speed stirring machine in proportion, then mixing with a compatilizer in a certain ratio at room temperature, and then carrying outmelt extrusion by virtue of a twin screw, so that the conductive master batch is prepared. The prepared composite material has excellent conductivity, is easy to add and can be widely applied to the fields of injection molding, extrusion and modification.

Description

technical field [0001] The invention belongs to the field of macromolecules, and in particular relates to a conductive masterbatch of a polyolefin substrate based on a composite system of carbon nanotubes and graphene and a preparation method thereof. Background technique [0002] As a general-purpose plastic, polyolefin is widely used for its large output, good performance and low price. However, due to its low surface energy, its molecules are chemically inert, resulting in poor adhesion, wettability, printing and dyeing properties, gas permeability, antistatic properties, and poor compatibility with other polar polymers and inorganic fillers. These shortcomings restrict the further application of polyethylene. In particular, polyolefin materials are often used in the packaging industry, but the insulation of polyolefins will cause the electrostatic charge accumulated on the surface of the packaging material to be unable to be released, thereby forming an electrostatic vo...

AI Technical Summary

Problems solved by technology

Conductive additives have inorganic and organic structures: organic conductive agents have excellent compatibility with plastics, but there are also some removal points, such as iodine-doped polyacetylene, after 1000 h exposure in air, its antistatic rate will drop by one order of magnitude, and iodine-doped polyphenylene vinylene basically loses its antistatic properties after being exposed to air for 250 h; inorganic conductive additives are generally dispersed in plastics to form a through / semi-through structure to obtain conductive and antistatic properties. Composite materials have a fatal shortcoming, that is, poor dispersion, especially nanostructured carbon nanotubes and graphene

[0004] As a new type of nanomaterial with the strongest electrical and thermal conductivity found so far, adding a small amount of carbon nanotubes and graphene to the plastic can theoretically make the plastic have good antistatic properties; There is a strong van der Waals force between them, so it is extremely difficult to disperse

How to effectively disperse carbon materials in composite materials has become a hot spot in the research of antistatic and even conductive materials, and there is no effective solution for this in the existing technology

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