Synthesis of Polar and Non-Polar Nano-Corundum and Uses for Aluminium Carboxylate Hybrid Nanocomposites with Enhanced Surface Mechanical and Viscoelastic Properties
✍ Scribed by Hans-Jürgen Gläsel; Eberhard Hartmann; Reiner Mehnert; Luise Wennrich; Andrea Prager-Duschke; Hazem Khalil; Karl Heinz Hallmeier; Ludmila Makhova; Christoph Thieroff; Michael R. Buchmeiser
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 261 KB
- Volume
- 292
- Category
- Article
- ISSN
- 1438-7492
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✦ Synopsis
Abstract
Amorphous aluminium carboxylate nanoparticles were checked for their potential as precursors for nano‐corundum powders prepared by a high‐temperature conversion process. Exemplifying x‐ray photoelectron spectroscopy studies of the aluminium carboxylate nanoparticles with polar and non‐polar ligands showed that, during the course of the high‐temperature treatment, specific features of the ultrafine organo‐aluminium powders such as polarity/non‐polarity and concomitant hydrophilic/hydrophobic properties were preserved. The resulting nano‐corundum powders were in turn identified as positive synergists for the enforcement of radiation‐cured aluminium carboxylate/acrylate coatings. The simultaneous (optional) use of micro‐corundum particles yielded polymer hybrid coatings. In comparison to acrylate‐based organo‐aluminium nanocomposites, polymeric hybrid coatings revealed significantly improved surface mechanical and viscoelastic properties. In addition to acrylate coatings, other polar and even non‐polar bulk polymers were subject to nano/micro modification using polar and non‐polar nano‐corundum powders, respectively.
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