Open AccessHYDROPHOBIC COATINGS ON CELLULOSE MATERIALS
Author(s) -
O. V. Baranov,
L. I. Komarova,
A. V. Rushevskaya,
V. I. Gomzayk
Publication year - 2018
Publication title -
tonkie himičeskie tehnologii
Language(s) - English
Resource type - Journals
eISSN - 2686-7575
pISSN - 2410-6593
DOI - 10.32362/2410-6593-2018-13-6-28-34
Subject(s) - materials science , contact angle , cellulose , alkoxy group , wetting , coating , chemical engineering , moisture , absorption of water , composite material , organic chemistry , chemistry , alkyl , engineering
A new hydrophobizator - tetra(ethoxy)di(octyl)disiloxane (TEDODS) - was synthesized in an ethanol solution at boiling point for 6 hours and characterized by NMR and IR spectroscopy. New hydrophobic coatings based on this compound were obtained under mild conditions by direct chemical modification of the surfaces of the cellulose materials (textile of different composition). The formation of a modified layer on the materials surface occurs due to the interaction of the ethoxy groups of the modifier and the hydroxyl groups of cellulose followed by heat treatment to fix it on the materials surface. The optimal conditions for obtaining the coatings were determined: 8% TEDODS weight gain with maximum hydrophobicity, with a wetting angle of 135°. The properties of the modified cellulose materials were studied (hydrophobicity, moisture absorption, etc.). The efficiency of using tetraethoxydioctyldisiloxane as a hydrophobizator when the content from 1% and a relatively small thickness of the coating of 2 microns was shown. It was found that hydrophobic coatings on the surface of cellulosic materials have little effect on moisture absorption and breathability of the original tissue.