Biotechnological Processes in the Technology of Forming of Leather Materials

Danylkovych, Anatoliy; Lishchuk, V.; Okhmat, Olena

doi:10.24263/2225-2924-2018-24-5-4

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2021

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“…The most typical for the leather manufacturing anionic dyes [8] such as anionic dark green; anionic black; anionic blue (JSC Fine organic synthesis plant "Barva", Ivano-Frankivsk region, Ukraine) were used for the adsorption on the cationic surface of montmorillonite particles. The structural formula of the dyes are presented on Fig.…”

Section: Methodsmentioning

confidence: 99%

Hybrid Pigments Based on Montmorillonite and Anionic Dyes for Leather Finishing

Bondaryeva

Mokrousova

Okhmat

2021

SSP

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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.

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Section: Methodsmentioning

confidence: 99%