Microstructure design of UHMWPE-based materials: blending with graphite nanoplatelets

The main scope of this work was to develop a processing method to homogeneously distribute graphite nanoplatelets (GNP) within an ultra-high molecular weight polyethylene (UHMWPE) matrix. After this step, we estimated the toughness of the new nanocomposite material. Combining a sonication step, a micro-extrusion step and a hot-pressing step, we did not reach an optimal distribution state of the nanofillers. Nevertheless, the toughness of the nanocomposites evaluated by Charpy tester was higher than that of the reference UHMWPE (only processed by hot-pressing). We also found that our new processing procedure applied to neat UHMWPE leads to the higher toughness than that of the nanocomposite. Micro-extrusion appears as a promising processing tool for neat UHMWPE.

[1]  M. Manley,et al.  Bearings of the future for total hip arthroplasty. , 2008, The Journal of arthroplasty.

[2]  Jose A. Rodriguez.  Cross-linked polyethylene in total knee arthroplasty: in opposition. , 2008, The Journal of arthroplasty.

[3]  Tony Unsworth,et al.  Proceedings of the Institution of Mechanical Engineers Part H. , 2008, Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine.

[4]  M. Zanetti,et al.  Radiation-induced crosslinking of UHMWPE in the presence of co-agents: chemical and mechanical characterisation , 2005 .

[5]  J. Fisher,et al.  Biological reactions to wear debris in total joint replacement , 2000, Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine.

[6]  A. Edidin,et al.  Advances in the processing, sterilization, and crosslinking of ultra-high molecular weight polyethylene for total joint arthroplasty. , 1999, Biomaterials.

[7]  S. Kurtz.  A Primer on UHMWPE , 2004 .

[8]  S. Kurtz.  Chapter 1 – A Primer on UHMWPE , 2004 .