Influence of surface modified nano silica on alkyd binder before and after accelerated weathering

Miroslav Nikolic, Hiep Dinh Nguyen, Anders Egede Daugaard, David Löf, Kell Mortensen, Søren Barsberg, Anand Ramesh Sanadi

Research output: Contribution to journalJournal articleResearchpeer-review


Introduction of nano fillers in exterior wood coatings is not straight forward. Influence on aging of polymer binder needs to be taken into account along with possible benefits that nano fillers can provide immediately after application. This study shows the influence of two differently modified hydrophobic nano silica on an alkyd binder for exterior wood coatings. One month after application, the highest strength and energy required to break the films was obtained with addition of 3% disilazane modified silica. Changes in tensile properties were accompanied with a small increase in glass transition temperature. However, the highest stability upon accelerated weathering, measured by ATR-IR and DMA, was for nano composites with the highest amount of nano filler. The reasons for the observed changes are discussed together with the appearance of a feature that is possibly a secondary relaxation of alkyd polymer.
Original languageEnglish
JournalPolymer Degradation and Stability
Pages (from-to)134-143
Publication statusPublished - 2016


  • Accelerated weathering
  • Alkyd
  • Exterior wood coatings
  • Nano silica
  • Nanocomposites
  • Surface modification


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