2.1. Paper Samples

Two different types of pre-coated papers were used for surface modification with HMDSO. The first paper was made from a combination of softwood (eucalyptus) and hardwood with production rests, and pre-coated with CaCO₃, kaolin fillers, and a latex binder. For the purpose of this text, this type of paper will be referred to paper 1. The other paper, referred as paper 2, was made from deinked pulp, mechanical pulp, and consisted of 18–24% inorganic parts, and pre-coated with starch. This type of paper had a much higher organic part in the coating compared to paper 1. Both papers were used for the deposition of HMDSO coating on the surface to study the coating morphology, chemical composition, and wettability, as well as oleophobic properties of the coating. The papers were treated in A4 format and analyzed with different surface analyzing techniques, as described in the following sections.