Polymer–silica nanocomposites prepared by sol–gel technique: nanoindentation and tapping mode AFM studies

Rodríguez Hernández, J.C., Salmerón-Sánchez, M. , Gómez Ribelles, J.L. and Monleón Pradas, M. (2007) Polymer–silica nanocomposites prepared by sol–gel technique: nanoindentation and tapping mode AFM studies. European Polymer Journal, 43(7), pp. 2775-2783. (doi: 10.1016/j.eurpolymj.2007.04.021)

Abstract

Polymer–silica nanocomposites based on poly(2-hydroxyethyl acrylate) (PHEA) have been prepared by the simultaneous polymerization of the organic and the silica phases in a sol–gel process with the silica precursor tetraethyl orthosilicate (TEOS). The structure of this system is investigated using atomic force microscopy (AFM) in the tapping mode and in nanoindentation experiments. The structure of the PHEA/silica hybrids strongly depends on the ratio of both components in the system. For silica weight fractions lower than 0.15, the system consists of aggregated silica particles dispersed in the organic matrix; above that concentration of silica the structure is co-continuous with that of the organic matrix, similarly to two interpenetrated networks.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Salmeron-Sanchez, Professor Manuel
• Authors: Rodríguez Hernández, J.C., Salmerón-Sánchez, M., Gómez Ribelles, J.L., and Monleón Pradas, M.
• College/School: College of Science and Engineering > School of Engineering > Biomedical Engineering
• Journal Name: European Polymer Journal
• ISSN: 0014-3057
• Published Online: 01 May 2007