DETERMINATION OF SURFACE-ENERGY AND WETTABILITY OF WOOD RESINS

The surface energy components of the lipophilic extractives isolated f rom thermo-mechanical pulp fibers have been determined. The influence of the chemical composition of the resin droplets on the surface prope rties was investigated. Furthermore, the critical surface tensions, as defined by Zisman [1,2], were determined for layers of the different resins applied on a stainless-steel surface. The resins were found to be rather lipophilic, although extensive acid-base interactions with t he surrounding media were detected. We further observed that surface a ctive substances dissolved in the continuous aqueous phase show self-a ssociating tendencies. (C) 1998 Elsevier Science B.V.