Effect of the composition of chitosan-modified natural silicates on tribotechnical characteristics of additives and formation of a surface layer in friction of surfaces was studied. The following composites were found to be the most promising: 90% serpentine + 10% chitosan-modified vermiculite; chitosan-modified serpentine; and 90% serpentine + 10% vermiculite. These composites provided the minimum friction coefficients due to introduction of polymeric chitosan into the interlayer space of an aluminosilicate. It was shown that introduction of 10% chitosan-modified layered silicate leads to formation of an organosilicate coating on the surface of chromiumplated steel. The composition and structure of the coating were determined by X-ray photoelectron spectroscopy and atomic-force microscopy.
Russian Journal of Applied Chemistry – Springer Journals
Published: Nov 16, 2012
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