Method for preparing graphene-polrvinyl chloride nanocomposite through in-situ emulsion polymerization

Abstract

The invention discloses a method for preparing graphene-polrvinyl chloride nanocomposite through in-situ emulsion polymerization, and belongs to the field of polymer nanocomposite. The method comprises the following steps of: (1) preparing a graphene oxide dispersing agent; (2) carrying out in-situ emulsion polymerization on graphene oxide and chloroethylene or the mixture of chloroethylene and a functional monomer; and (3) post-processing the composite material emulsion. According to the method disclosed by the invention, the graphene oxide is subjected to in-situ emulsion polymerization with the chloroethylene and the internal plasticizing functional monomer; the obtained graphene nanometer sheet layer is completely and uniformly wrapped into polymer particle size with grain size of 100 to 300microns through polrvinyl chloride or chloroethylene copolymer. The post-processing technology of the size is basically the same as that of common PVC (Poly Vinyl Chloride) in the existing water-phase suspension polymerization method; the dried powder can be applied to a plurality of processing methods, such as injection molding, extruding, die casting, blow molding and curtain coating and the like, for polymer materials.

Description

technical field [0001] The invention belongs to the field of polymer nanocomposite materials, and in particular relates to a method for preparing graphene-polyvinyl chloride nanocomposite materials by emulsion in-situ 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 is a...

AI Technical Summary

Problems solved by technology

However, due to its special geometric structure, it is difficult for graphene to achieve uniform dispersion on the nanometer scale through ordinary physical 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.