Modifying friction between ultra-high molecular weight polyethylene (UHMWPE) yarns with plasma enhanced chemical vapour deposition (PCVD)

We report here for the first time how a copper coating bond to ultra-high molecular weight polyethylene (UHMWPE) via low temperature aerosol assisted chemical vapour deposition.

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Chemical vapour deposition of soluble poly(p-xylylene) copolymers with tuneable properties

Polymer Chemistry ◽

10.1039/c5py01343g ◽

2016 ◽

Vol 7 (1) ◽

pp. 54-62 ◽

Cited By ~ 2

Author(s):

Ilka E. Paulus ◽

Markus Heiny ◽

V. Prasad Shastri ◽

Andreas Greiner

Keyword(s):

Molecular Weight ◽

High Molecular Weight ◽

Chemical Vapour Deposition ◽

Vapour Deposition ◽

Chemical Vapour ◽

Ethyl Methacrylate ◽

High Molecular Weight Poly ◽

Soluble Poly

High-molecular weight poly(p-xylylene) (PPX)/2-hydroxy-ethyl methacrylate (HEMA) copolymers are synthesized by chemical vapour deposition. The copolymer coatings are hydrophilic and show good cytocompatibility.

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Comparison of wear of ultra-high molecular weight polyethylene acetabular cups against surface-engineered femoral heads

Proceedings of the Institution of Mechanical Engineers Part H Journal of Engineering in Medicine ◽

10.1243/09544119jeim407 ◽

2008 ◽

Vol 222 (7) ◽

pp. 1073-1080 ◽

Cited By ~ 27

Author(s):

A Galvin ◽

C Brockett ◽

S Williams ◽

P Hatto ◽

A Burton ◽

...

Keyword(s):

Molecular Weight ◽

High Molecular Weight ◽

Hip Joint ◽

Vapour Deposition ◽

Polyethylene Wear ◽

Chemical Vapour ◽

Alumina Ceramic ◽

Femoral Heads ◽

Ultra High Molecular Weight ◽

Hip Joint Simulator

Alumina ceramic heads have been previously shown to reduce polyethylene wear in comparison to cobalt chrome (CoCr) heads in artificial hip joints. However, there are concerns about the brittle nature of ceramics. It is therefore of interest to investigate ceramic-like coatings on metallic heads. The aim of this study was to compare the friction and wear of ultra-high molecular weight polyethylene (UHMWPE) against alumina ceramic, CoCr, and surface-engineered ceramic-like coatings in a friction simulator and a hip joint simulator. All femoral heads tested were 28 mm diameter and included: Biolox™ Forte alumina, CoCr, arc evaporative physical vapour deposition (AEPVD) chromium nitride (CrN) coated CoCr, plasma-assisted chemical vapour deposition (PACVD) amorphous diamond-like carbon (aDLC) coated CoCr, sputter CrN coated CoCr, reactive gas controlled arc (RGCA) AEPVD titanium nitride (TiN) coated CoCr, and Graphit-iC™ coated CoCr. These were articulated against UHMWPE acetabular cups in a friction simulator and a hip joint simulator. Alumina and CoCr gave the lowest wear volumes whereas the sputter coated CrN gave the highest. Alumina also had the lowest friction factor. There was an association between surface parameters and wear. This study indicates that surface topography of surface-engineered femoral heads is more important than friction and wettability in controlling UHMWPE wear.

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