Method for preparing grapheme-polyvinyl chloride nano composite resin through in situ suspension polymerization

Abstract

The invention discloses a method for preparing a grapheme-polyvinyl chloride nano composite material through in situ suspension polymerization and belongs to the field of polymer nano composite materials. The method mainly comprises steps of preparation of grapheme oxide dispersion liquid, in situ suspension polymerization of grapheme oxide and chloroethylene or chloroethylene/functional monomer mixtures and post-processing of composite material slurry. By the aid of the method, the grapheme oxide, the chloroethylene and internal plasticization functional monomers are subjected to in situ suspension polymerization, polymer granule slurry of which the granule diameter is in a range from 100 mu m to 300 mu m is obtained, and a grapheme nano layer is coated by polyvinyl chloride or polyvinyl chloride copolymer completely and uniformly. The post-processing process of the slurry is basically the same as general polyvinyl chloride (PVC) resin used in an existing aqueous phase suspension polymerization method . Dried powder materials can be used for a plurality of polymeric material processing methods such as injection molding, extrusion, mold pressing, blow molding and casting.

Description

technical field [0001] The invention relates to a preparation method of a polymer nanocomposite material, in particular to a method for preparing a graphene-polyvinyl chloride nanocomposite material by in-situ suspension polymerization. Background technique [0002] Graphene is a form of carbon, which is an allotrope of carbon, like carbon nanotubes, fullerenes, and diamonds. In 2004, it was made by A.K.Geim of the United Kingdom by stripping natural graphite by tape method. His work won the Nobel Prize in Physics in 2010. Graphene is a layer of carbon atoms connected by carbon atoms in the form of sp2 hybrid orbital covalent bonds, a two-dimensional structure of carbon atoms. The thickness is 0.34nm. [0003] It is the thinnest nanomaterial found so far. It has been found through calculations that graphene is currently the material with the highest mechanical strength in the world. Its Young's modulus at room temperature is as high as 1000GPa, and its tensile strength i...

AI Technical Summary

Problems solved by technology

However, due to its special geometric structure, graphene is difficult to achieve uniform dispersion on the nanometer scale through ordinary melt blending methods in polymer substrates, which greatly reduces the mixing effect.

However, the solvent blending method requires a large amount of organic solvents and is not environmentally friendly, and the process requires high energy consumption, long process and low yield, which is almost impossible to industrialize.