Physics, Chemistry and Materials Science at the Nanoscale
Cite as: B. Riedl, V. Vardanyan, W. N. Nkeuwa, A. Kaboorani, et al. Nanocomposite coatings, nano Online. (2016). DOI: https://doi.org/10.1515/nano.0053.00015
Cite as: B. Riedl, V. Vardanyan, W. N. Nkeuwa, A. Kaboorani, et al.: Nanocomposite coatings. In: Functional Materials. De Gruyter (2014). 443–464. DOI: https://doi.org/10.1515/9783110307825.443
This chapter will review the techniques for synthesis and characterization of coatings containing nanoparticles for various substrates (i.e., nanocoatings and bio-based nanocoatings). The discussion will focus mainly on coatings developed for wood substrates, although coatings can also be applied to other types of substrates requiring functional surface properties. There are several terms to describe different types of coatings: stains, varnishes, paints, lacquers, and glazes. Here we will use the general term coating and adapt the specific terms to address specific situations. This chapter will introduce some aspects of the chemistry and physics of coatings reinforced with nanoparticles. There is a large variety of coatings for wood and one can categorize them as a function of their chemical, physical, and optical properties (Figs. 16.1, 16.2). According to the formulation, these can be water-based or solvent-borne, high solid contents, UV-cured or even powders. Considering a particular application, they can be designed for exterior or interior use; they can also be transparent or opaque and can incorporate several combinations of these characteristics. The main objective of coatings incorporating nanoparticles reinforcement is better resistance to wear, UV degradation and water ingress, all of which must be done without affecting visual characteristics such as brilliance, color and transparency. The starting hypothesis is that nanoparticles, when combined with existing coating formulation, may display improved performance when compared to a similar coating containing microparticles.