Production of hydrophobized leather and fur materials

Danylkovych, Anatoliy; Lishchuk, V.

doi:10.24263/2225-2924-2020-26-5-6

Cited by 3 publications

(7 citation statements)

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“…Harrington's desirability function was used in this study, which showed sufficient efficiency compared to other desirability functions [25]. The effectiveness of the desirability-based approach compared to other multi-purpose optimization strategies has been confirmed by numerous studies [26][27][28][29]. It should be noted that the optimization of the generalized desirability criterion may be accompanied by computational difficulties due to the complex structure of this criterion.…”

Section: Multi-objective Optimization Of Liming Technology Using Harr...mentioning

confidence: 82%

“…The influence of the liming process factors on the semi-finished product formation was determined by liming process physico-chemical and technological properties. Elastoplastic properties of the semifinished product in compression strain were measured by an indicator gauge with a division value of 0.01 mm according to the standard method described in [18]. Swelling of the limed semi-finished product was expressed as an increased percentage in thickness after washing to the soaked rawhide thickness.…”

Section: Methodsmentioning

confidence: 99%

“…Hydrothermal stability was determined by the sample initial length reduction when semi-finished product heated in water or a glycerine and water mixture by weighting ratio 4:1 with a speed of 2-3 ºC/min according to DSTU 2726-94. The porosity of rawhides, limed semi-finished product after alcoholether dehydration, and the leather after conditioning at a temperature of 20 ± 2°C and humidity of 65 ± 5% was set by the ratio of pore volumes and sample elongation at rapture of 9.81 MPa on the rupture machine RT-250M (belt A) and at a deformation rate of 80 mm/min according to the methods indicated in [18,19]. To render gelatin, limed samples were used from the rump washed for 24 h under flowing water.…”

Section: Methodsmentioning

confidence: 99%

“…The samples were obtained from the butt topographic area of two wet salted extreme light steer hides. The samples were completed in batches by the method of asymmetric fringe [18]. The hypodermis tissue of the hides was removed using a shaving machine.…”

Section: Obtaining the Mathematical Modelmentioning

confidence: 99%

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Optimization of Rawhide Collagen Defibrillization Process

Danylkovych,

Lishchuk,

Sanginova

et al. 2023

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The paper features the rawhide collagen defibrillization process in the elastic leather materials manufacturing. Optimal colloid-chemical properties of semi-processed products were defined by way of using mathematical optimization of rowhide liming process. It was found that during the alkaline treatment of raw material (in the operating temperature range) the degree of defibrillation of raw material raises (in proportion to the derm collagen swelling) with increase in the ratio of process solution to the mass of raw material, and the extremum of hydrothermal stability and leather yield can be estimated. It was also shown that the degree of swelling decreases with a decreasing ratio of sodium sulphide and sodium hydrosulphide, and the leather area yield reaches the maximum value at the equal proportion of these reagents. Multicriteria optimization of rawhide liming process using the Harrington’s desirability function was carried out. The developed technology of soaking and liming was tested under production conditions. The above-mentioned low-waste technology provides elastic leather materials with a yield increase by 3.5%, which meet the industry standards requirements.

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Section: Multi-objective Optimization Of Liming Technology Using Harr...mentioning

confidence: 82%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Obtaining the Mathematical Modelmentioning

confidence: 99%

See 2 more Smart Citations

Optimization of Rawhide Collagen Defibrillization Process

Danylkovych,

Lishchuk,

Sanginova

et al. 2023

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“…Physic-chemical and physic-mechanical methods were used to evaluate the effectiveness of montmorillonite during tanning [5]. The effectiveness of the use of modified montmorillonite to improve the environmental friendliness of the tanning process was evaluated by the level of BOD and COD.…”

Section: Introductionmentioning

confidence: 99%

Дослідження Екологічної Технології Дублення Шкіри З Використанням Модифікованого Монтморилоніту

Mokrousova,

Okhmat,

Zhaldak

2022

PEI

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The article is devoted to the analysis of the level of environmental friendliness of the chromium tanning process carried out with the use of modified montmorillonite. Leather technology has a complex technological sequence of processes and operations for the processing biogenic material. The leather technology is based on a set of various, consistently performed processing of leather raw materials and semi-finished products. The technology uses chemical materials that are not always environmentally friendly. The principles of greening provide for complete or partial exclusion of environmentally unfriendly materials from technological processes. The eco-destructive impact on the environment of chromium tanning was established. Therefor an innovative direction of eco-friendly leather production is the partial replacement of tanning compounds of chromium with other structuring compounds that have a structuring effect.The aim of the work was to determine the ecological efficiency of the technology of manufacturing leather obtained using modified montmorillonite. The object of research is the process of formation of leather properties in the process of tanning with the use of modified montmorillonite.Environmental friendliness of chromium tanning technology with the use of modified montmorillonite is substantiated by: efficiency of formation of dermis structure; increasing the level of leather quality indicators; partial replacement of chromium compounds during tanning.The technology provides: reduction of the negative impact on the environment of leather production; reducing the amount of chromium compounds in the tanning process; reduction of production costs for purification of waste liquids; increasing indicators of biological and chemical oxygen consumption; obtaining after tanning potentially biodegradable wastewater.

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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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Production of hydrophobized leather and fur materials

Cited by 3 publications

References 0 publications

Optimization of Rawhide Collagen Defibrillization Process

Optimization of Rawhide Collagen Defibrillization Process

Дослідження Екологічної Технології Дублення Шкіри З Використанням Модифікованого Монтморилоніту

Hybrid Pigments Based on Montmorillonite and Anionic Dyes for Leather Finishing

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