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Processing and mechanical properties of HA/UHMWPE nanocomposites

Paper ID Volume ID Publish Year Pages File Format Full-Text
11485 744 2006 7 PDF Available
Title
Processing and mechanical properties of HA/UHMWPE nanocomposites
Abstract

A hydroxyapatite (HA) particulate reinforced ultrahigh molecular weight polyethylene (UHMWPE) nanocomposite was fabricated by compounding HA and UHMWPE mixtures in paraffin oil using twin-screw extrusion and then compression molding. Scanning electron microscope images revealed that HA aggregates were broken down to nano-sized particles and homogeneously dispersed in UHMWPE by the combined processes of twin-screw extrusion and UHMWPE swelling treatment. Transmission electron microscope images indicated the HA particles and UHMWPE matrix were intimately contacted through mechanical interlocking. The composite with the HA volume fraction of 0.23 exhibited a Young's modulus nine times higher than that of UHMWPE, while the composite maintained the excellent toughness feature of UHMWPE. The fracture strain reached over 300%, significantly higher than other types of biocomposites.

Keywords
Nanocomposite; Polyethylene; Hydroxyapatite; Mechanical properties; Extrusion
First Page Preview
Processing and mechanical properties of HA/UHMWPE nanocomposites
Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 27, Issue 20, July 2006, Pages 3701–3707
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering