Abstract
An investigation was made of the role of nanosized biocompatible polymer systems based on ultra-high-molecular-weight polyethylene (UHMWPE) in the formation of the friction surface and tribological properties of nanocomposites. The investigation was conducted on porous (including micro- and nanoporous) UHMWPE modified with supercritical carbon dioxide, nanosized silver, and dispersed hydroxyapatite. It was found that, during processing, modified UHMWPE forms a microporous surface that, during friction, ensures discrete contact of the interacting bodies. The introduction into modified UHMWPE of small amounts (0.05–0.4%) of nanosized silver and dispersed hydroxyapatite considerably stabilises the discrete surface relief and improves the tribological properties, and here nanosilver is far more efficient than hydroxyapatite.
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