İndirgenmiş Grafen Oksit Katkılı UHMWPE Kompozitin Kuru ve Sulu Ortamlarda Aşınma Davranışlarının Karşılaştırılması

Year 2019, - Cilt:8 - IMSMATEC Özel Sayı, 12 - 20, 15.12.2019

Alime Çolak Ferda Mindivan , Meryem Göktaş

https://doi.org/10.17100/nevbiltek.633270

Cited By: 2

Abstract

Bu
çalışmada, katkısız ultra yüksek moleküler ağırlıklı polietilen (UHMWPE) ile
ağırlıkça % 0,5 indirgenmiş grafen oksit (CRGO) katkılı kompozitin (CRGO/UHMWPE) kuru ve saf su ortamlarında aşınma
davranışları incelenmiştir. Morfolojik incelemeler CRGO dolgusunun polimer
matriksde homojen dağıldığını ve matriks dolgu etkileşiminin sağlandığını
göstermiştir. Kompozit örneğinin sürtünme katsayısı ve aşınma hızı hem kuru hem
de saf su ortamlarında CRGO ilavesi ile azalmıştır. Kuru aşınma ortamında kompozit
örneğinde plastik deformasyon ve yorulma aşınması baskınken, saf su ortamında
adhezif aşınma izleri görülmüştür.

Keywords

UHMWPE kompozit, İndirgenmiş grafen oksit, Sürtünme, Aşınma mekanizmaları.

A Comparative Investigation of The Wear Behavior of Reduced Graphene Oxide Filled UHMWPE Composite Under Dry and Water Environments

Abstract

Ultra-high molecular weight
polyethylene (UHMWPE) is the most relevant materials for hip and knee
replacements due to its bio-compatibility and excellent properties. In this
study, graphene with its low density and lubricating properties was used as
filler and was incorporated into UHMWPE matrix to strengthen the performance of
composite. Wear behaviors of pure UHMWPE and composite (CRGO/UHMWPE) filled
with 0,5 wt.% reduced graphene oxide (CRGO) under dry and distilled water
environments were studied. UHMWPE and CRGO were mixed with the liquid phase
ultrasonic dispersion and composite sample were produced by hot press molding.
FTIR analysis results showed that there was interaction between the filler and
polymer matrix, XRD analysis confirmed the modification of crystalline
structure of UHMWPE and SEM-EDS elemental mapping results of composite
indicated that oxygen was uniformly distributed in the polymer matrix. The
coefficient of friction and wear rate of composite sample decreased under both
dry and distilled water conditions by the addition of CRGO filler. Because
lubrication capability of both graphene and distilled water had a significantly
effect on friction and wear behavior of composite sample.  Plastic deformation and fatigue wear were
dominant for the composite sample under dry sliding but adhesive wear tracs
were observed under distilled water conditions.

Keywords

UHMWPE composite, Reduced graphene oxide

References

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