Hybrid Pigments Based on Montmorillonite and Anionic Dyes for Leather Finishing

Abstract:

The work is focused on obtaining hybrid pigments by adsorption of anionic dyes on positively charged montmorillonite. Modification of the sodium form of montmorillonite by chromium hydroxocomplexes was provided to ensure effective adsorption of anionic dyes on the surface of mineral particles. A high level of adsorption of anionic dyes as a result of steric factor was revealed. It was shown that the adsorption of dyes depended on the pH of the medium and was characterized by a maximum level at pH 4.5 – 6.0. The scheme of obtaining hybrid pigments, which were characterized by good сovering ability, resistance to stratification, especially saturated and intense colour was proposed.

• Periodical: Solid State Phenomena (Volume 320)
• Pages: 198-203
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.320.198
• Online since: June 2021
• Authors: Anna Bondaryeva, Olena Mokrousova*, Olena Okhmat
• Keywords: Anionic Dyes, Coating, Hybrid Pigment, Leather Finishing, Modification, Montmorillonite

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