Figure 3.
Effect of GDE/CLP ratio, coat weight, and surface roughness on water resistance of the wood coatings. (a) WCAs of GDE/CLP coatings of different thicknesses, commercial reference coatings, and uncoated wood after 60 s of surface contact. (b) Change of droplet size on GDE/CLP coatings and uncoated wood over time. (c) SEM image of a coating with the respective GDE/CLP ratio and thickness of 0.52 g/g and 12.4 g(CLP)/m2. (d) Light interferometry height color-map images of a coating with a GDE/CLP ratio of 0.52 g/g (left) and a commercial epoxy coating (right). (e) Surface roughness values obtained by light interferometry measurements of wood coated with different GDE/CLP ratios with coat weights of 12.4 g(CLP)/m2, commercial nonparticulate coatings, and uncoated wood.