Abstract
Ultrahigh-molecular-weight polyethylene (UHMWPE) is used as an articulating surface in total hip and knee joint replacement. In order to enhance long-term durability/wear resistance properties, UHMWPE-based polymer–ceramic hybrid composites are being developed. Surface properties such as wettability and protein adsorption alter with reinforcement or with change in surface chemistry. From this perspective, the wettability and protein adsorption behavior of compression-molded UHMWPE–hydroxyapatite (HA)–aluminum oxide (Al2O3)–carbon nanotube (CNT) composites were analyzed in conjunction with surface roughness. The combined effect of Al2O3 and CNT shows enhancement of the contact angle by ~37° compared with the surface of the UHMWPE matrix reinforced with HA. In reference to unreinforced UHMWPE, protein adsorption density also increased by ~230% for 2 wt.%HA–5 wt.%Al2O3–2 wt.%CNT addition to UHMWPE. An important conclusion is that the polar and dispersion components of the surface free energy play a significant role in wetting and protein adsorption than do the total free energy or chemistry of the surface. The results of this study have major implications for the biocompatibility of these newly developed biocomposites.
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The authors acknowledge the funding from the Department of Biotechnology, Government of India.
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Gupta, A., Tripathi, G., Basu, B. et al. Dependence of Protein Adsorption on Wetting Behavior of UHMWPE–HA–Al2O3–CNT Hybrid Biocomposites. JOM 64, 506–513 (2012). https://doi.org/10.1007/s11837-012-0295-3
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DOI: https://doi.org/10.1007/s11837-012-0295-3