Method for preparing hyperdispersant by adopting oxidized graphene and application thereof

Abstract

The invention discloses a method for preparing hyperdispersant by adopting oxidized graphene and application thereof. The oxidized graphene is adopted as centronucleus of the hyperdispersant; diethylene triamine and stearic acid are adopted to implement two-step grafting, so that the reaction of hydroxy and epoxy radicals on the upper surface of the oxidized graphene disappears to form stable anchoring radicals, and the grafted diethylene triamine and stearic acid are formed to a solvation chain for preferably wetting, dispersing and bridging all components of a wood-plastic composite material. The method provided by the invention adopts the hyperdispersant prepared by the oxidized graphene for applying in the production process of the wood-plastic composite material, so that the incompatibility among plastic resin, filler and wood powder caused by the interface polarity can be effectively eliminated, the dispersing performance thereamong is modified, bridged chemical hydrogen bonds are generated thereamong, and finally, the mechanical property of the material is largely improved.

Description

technical field [0001] The invention belongs to the technical field of dispersant preparation, in particular to a method for preparing a hyperdispersant by using graphene oxide and its application. Background technique [0002] Wood-plastic composites (Wood-Plastic Composites, WPC) is a new type of composite material that has been booming at home and abroad in recent years. It refers to the use of polyethylene, polypropylene and polyvinyl chloride, etc. Wood flour, rice husk, straw and other waste plant fibers are mixed into new wood materials, and then processed by extrusion, molding, injection molding and other plastic processing techniques to produce boards or profiles. [0003] Since the main component of wood flour is cellulose, which contains a large number of hydroxyl groups and has strong polarity; while most thermoplastics are non-polar and hydrophobic, the compatibility between the two is poor, and the interface The cohesion is very small, and lubricants can impro...

AI Technical Summary

Problems solved by technology

[0004] Using graphene oxide as the central core of the hyperdispersant, two-step grafting with ethylene triamine and stearic acid finally makes the hydroxyl and epoxy groups on the graphene oxide disappear and become a stable anchoring group It is a good bridge between wood flour, inorganic fillers and plastic resins to improve their compatibility. This idea has not been reported so far.