Signaling structures for protecyion of the paper, received with elements of zele-gel technology

Purpose. Development of two-layer silicon-organic coatings for paper protection using solgel technology and evaluation of their application efficiency in conditions of high humidity. Methodology. The researches were carried out using standard common methods and quantitative IR spectroscopy. Findings. Protective two-layer coatings for paper made from unbleached cellulose with the use of sol-gel elements based on siloxane-based materials containing → Si-OK and → Si-OEt in the functional sublayer and polyethylhydrisiloxane-in the surface are developed. This is a quantitative assessment of the application of such coatings to protect paper in wet conditions. The most effective protective silicon organic coatings are determined and their efficiency during operation is estimated. Originality. For the first time, the feasibility of using the technology using sol-gel elements at the stages of hydrolysis and condensation has been substantiated, which allows the effective use of siloxanes with Si-OK and → Si-OC2H5 groups as the base for the formation of functional sublayers on the surface of cellulosic materials. The practical value. Silicone coatings to protect the paper, obtained with elements of solgel technology. The features of the formation of a system of siloxane coatings to protect paper from unbleached pulp with elements of sol-gel technology are investigated. The feasibility and efficiency of using a two-ball scheme, which includes the possibility of binding hydroxyl groups of the paper surface and the additional formation of a hydrophobic protective ball by using siloxanes with different reactive groups near the silicon atom (→ Si-OK, → Si-OEt, → Si-OH, → Si - H). In addition, the feasibility of applying technologies using sol-gel elements in the stages of hydrolysis and condensation has been substantiated. The scheme of formation of protective twolayer coatings for paper made of unbleached cellulose was proposed, the mechanism of its formation was investigated, a quantitative assessment was made and the most effective schemes of protective silicon-organic coatings were determined

paper; cellulose; siloxanes; hydrophobicity; hydroxyl groups