GraNet - Graphene / Polypropylene Composite Nets for Filtration

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This project will investigate the use of Graphene to form a composite material with polypropylene, a widely used plastic. If Graphene platelets can be successfully dispersed within the polypropylene matrix then it should be possible to achieve significant improvements in material properties. The project team comprises Delstar (DS), Graphene producers Thomas Swan (TS), Graphene functionalisers Haydale (HD) and the University of Bradford (UoB). The particular target applicationfor this research is a special type of filtration net, which is produced by extruding a thin film layer, embossing a pattern onto the film and then stretching it to produce holes. It is anticipated that by introduction of a small percentage of Graphene into the base polymer, properties such as physical strength and operating temperature of the filtration nets can be improved, which will allow polypropylene to replace more expensive and denser plastics. The project will explore how to achieve a good dispersion and exfoliation of Graphene platelets within the plastic without damaging them and hence reducing their benefit. Initial studies at UoB will focus on small laboratory scale extrusionexperiments using different types of Graphene (produced by TS and modified by HD) and a range of process conditions. After characterisation, the most successful compounds will be produced on a bigger scale and formed into films, which can be stretched to mimic the industrial process. Finally, after the optimum formulation and process conditions have been determined, an industrial scale batch of composite material (100kg) will be produced and used in production trials at DS. These demonstrator products will be provided to their customers for feedback in target markets. Notably, the whole supply chain for these new products, including Graphene production, compounding, extrusion/embossing and filter cartridge manufacture will be based in the UK.