Jump to main content
Jump to site search

Issue 102, 2016, Issue in Progress
Previous Article Next Article

Nanoindentation and wear behavior of thermally stable biocompatible polysulfone–alumina nanocomposites

Author affiliations

Abstract

Besides improving mechanical performance, wear resistance is the first prerequisite for a dental material to be accepted by both dentists and patients, and therefore good wear behavior may contribute to the longevity and durable aesthetics of a dental material such as brackets or implants. In this work we have investigated the wear and mechanical behavior, along with the thermal stability, of polysulfone/modified alumina. γ-Alumina nanoparticles have been modified with polysulfone (PSU) chains of two different molecular weights. The modification leads to an enhanced homogeneous dispersion, as was confirmed using TEM-image analysis, and enhanced mechanical and wear behavior when compared with a PSU/alumina nanocomposite. Nanoindentation measurements confirmed that the elastic modulus values were enhanced when modified nanoparticles were used to prepare nanocomposites. Abrasive wear analysis revealed that the wear volume loss was decreased when the nanoparticles were modified. The PSU chains grafted to alumina promoted enhanced particle dispersion, which at the same time induced protection in the polysulfone matrix against wearing off. The results showed a clear tendency for increased strength and wear resistance, without sacrificing transparency. Regarding the thermal stability of the materials prepared, the results showed similar thermal stabilities for both neat PSU and modified particle nanocomposites up to a certain temperature (i.e., ∼550 °C), and after this temperature these nanocomposites displayed a higher thermal stability than neat PSU.

Graphical abstract: Nanoindentation and wear behavior of thermally stable biocompatible polysulfone–alumina nanocomposites

Back to tab navigation

Supplementary files

Publication details

The article was received on 18 Aug 2016, accepted on 11 Oct 2016 and first published on 11 Oct 2016


Article type: Paper
DOI: 10.1039/C6RA20838J
Citation: RSC Adv., 2016,6, 100239-100247
  •   Request permissions

    Nanoindentation and wear behavior of thermally stable biocompatible polysulfone–alumina nanocomposites

    A. Llorente, B. Serrano, J. Baselga, G. Gedler and R. Ozisik, RSC Adv., 2016, 6, 100239
    DOI: 10.1039/C6RA20838J

Search articles by author

Spotlight

Advertisements