Novel Nanosized Aluminium Carboxylates: Synthesis, Characterization and Use as Nanofillers for Protective Polymeric Coatings

✍ Scribed by Hans-Jürgen Gläsel; Eberhard Hartmann; Luise Wennrich; Thomas Höche; Michael R. Buchmeiser

• Book ID: 102484493
• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 262 KB
• Volume: 292
• Category: Article
• ISSN: 1438-7492
• DOI: 10.1002/mame.200600337

✦ Synopsis

Abstract

A mixture of novel aluminium carboxylate nanoparticles and aluminium hydroxide ultrafine powder was prepared via precipitation reaction between Al(2‐PrO)~3~ and maleic acid. In this mixture both free primary particles occur (mean geometrical size around 40 nm) together with a secondary agglomerated particle fraction of sizes in the low micrometer region. However, centrifugation processes allowed for the removal of the latter and resulted in the formation of size stable nanopowders. Up to 30 wt.‐% of these particles were incorporated into acrylate matrices resulting in low‐viscosity formulations with [η] < 1 000 mPa · s, which allowed for roller application and even spray coating of these nanocomposites at room temperature. Radiation curing of such coatings was accomplished via UV irradiation. In comparison to the corresponding SiO~2~‐based nanocomposites and carboxylate alumoxane fillers, the cured coatings revealed significantly improved surface mechanical properties.

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