Graphene scavenges free radicals to synergistically enhance structural properties in a gamma-irradiated polyethylene composite through enhanced interfacial interactions
Physical Chemistry Chemical Physics, ISSN: 1463-9076, Vol: 17, Issue: 35, Page: 22900-22910
2015
- 53Citations
- 43Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Metrics Details
- Citations53
- Citation Indexes53
- 53
- CrossRef49
- Captures43
- Readers43
- 43
Article Description
A unique strategy for scavenging free radicals in situ on exposure to gamma irradiation in polyethylene (PE) nanocomposites is presented. Blends of ultra-high molecular weight PE and linear low-density PE (PEB) and their nanocomposites with graphene (GPEB) were prepared by melt mixing to develop materials for biomedical implants. The effect of gamma irradiation on the microstructure and mechanical properties was systematically investigated. The neat blend and the nanocomposite were subjected to gamma-ray irradiation in order to improve the interfacial adhesion between PE and graphene sheets. Structural and thermal characterization revealed that irradiation induced crosslinking and increased the crystallinity of the polymer blend. The presence of graphene further enhanced the crystallinity via crosslinks between the polymer matrix and the filler on irradiation. Graphene was found to scavenge free radicals as confirmed by electron paramagnetic resonance spectroscopy. Irradiation of graphene-containing polymer composites resulted in the largest increase in modulus and hardness compared to either irradiation or addition of graphene to PEB alone. This study provides new insight into the role of graphene in polymer matrices during irradiation and suggests that irradiated graphene-polymer composites could emerge as promising materials for use as articulating surfaces in biomedical implants.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84940492479&origin=inward; http://dx.doi.org/10.1039/c5cp02609a; http://www.ncbi.nlm.nih.gov/pubmed/26266702; https://xlink.rsc.org/?DOI=C5CP02609A; http://xlink.rsc.org/?DOI=C5CP02609A; http://pubs.rsc.org/en/content/articlepdf/2015/CP/C5CP02609A; https://dx.doi.org/10.1039/c5cp02609a; https://pubs.rsc.org/en/content/articlelanding/2015/cp/c5cp02609a
Royal Society of Chemistry (RSC)
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