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Processing of hydroxyapatite reinforced ultrahigh molecular weight polyethylene for biomedical applications

Paper ID Volume ID Publish Year Pages File Format Full-Text
12726 814 2005 8 PDF Available
Title
Processing of hydroxyapatite reinforced ultrahigh molecular weight polyethylene for biomedical applications
Abstract

A new method for processing hydroxyapatite/ultrahigh molecular weight polyethylene (HA/UHMWPE) composite has been developed by combining wet ball milling and swelling. Sintered HA particles were ground in ethanol to ∼50 nm in diameter. The nano-sized HA particles were mechanically mixed with UHMWPE in the ball mill and then compression molded into solid slabs. The slabs were then swollen in a pharmaceutical grade paraffin oil to enhance the UHMWPE chain mobility and HA/UHMWPE interface adhesion before final hot press. The resultant composite exhibits a two-zone network structure formed by a homogeneous HA-rich phase and a UHMWPE-rich phase. This process resulted in a 90% increase in Young's modulus and a 50% increase in the yield strength of HA/UHMWPE composite, comparing with those of unfilled UHMWPE.

Keywords
Hydroxyapatite; UHMWPE; Composite; Swelling; Ball milling
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 26, Issue 17, June 2005, Pages 3471–3478
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us