Cleaner approach in leather dyeing using graft copolymer as high performance auxiliary: related kinetics and mechanism

Kanagaraj, J.; Panda, Rames C.; Senthilvelan, T.; Gupta, Sanjeev K.

doi:10.1016/j.jclepro.2015.05.109

Cited by 23 publications

(8 citation statements)

References 41 publications

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“…The computing or excitation function in hidden layer and in output layer is chosen as sigmoid function. Initial concentration of mekmeko (over range of 5-30%), pH (over range [3][4][5][6], duration of (0.5 to 10 hr), and temperature (over range of 40-80°C) were used as inputs of ANN model. The percentage of dye uptake was the experimental response or output variable.…”

Section: Ann Augmented With Genetic Algorithmmentioning

confidence: 99%

“…Though the process has been practiced in the laboratory and smaller commercial scales using traditional dyes, applications in higher/lower scales need substantial analysis through mathematical models, which also help in finding optimal operating parameters. The exit stream from this operation contains unused dye, which needs to be removed from the waste stream before letting it out to nature or reuse as feed water for the next batch . Khayeta et al modeled the nature of the process involving dyes‐coagulant during flocculation before membrane separation using statistical tools and optimized using response surface methodology (RSM).…”

Section: Introductionmentioning

confidence: 99%

“…The exit stream from this operation contains unused dye, which needs to be removed from the waste stream before letting it out to nature or reuse as feed water for the next batch. 3 Khayeta et al 4 modeled the nature of the process involving dyes-coagulant during flocculation before membrane separation using statistical tools and optimized using response surface methodology (RSM). They reported optimal values corresponding to a temperature of 40°C, a concentration of aluminum sulphate of 0.82 g/L and an initial pH value of 5.6 with Monte Carlo simulation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Rumex abyssinicus (mekmeko) extract as cleaner approach for dyeing in product manufacture: Optimization and modeling studies

Mohammed

Panda

Madhan

et al. 2017

Asia-Pacific J Chem Eng

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Some of the synthetica dyes, used in leather dyeing, are carcinogenic. Hence an eco‐benign dyeing is made for leather based on mekmeko (Rumex abyssinicus) extract that contains the anthraquinones, a natural dyeing constituent containing bioactive compounds. It is the first time where this material is tried for dyeing application in leather manufacture. The Langmuir adsorption isotherm is supported by a thermodynamic model and is augmented using intra‐particle diffusion model. The optimum concentration of the extract for dyeing was 20% based on the weight of the undyed crust leather (dry). For the modeling and optimization studies of mekmeko‐based dyeing process, response surface methodologies and artificial neural network were used. The pH, temperature, and time effects on exhaustion of the dye were studied. The optimized conditions were found to be pH 4.5, temperature 60 °C, and duration 5.5 hr. The exhaustion level of mekmeko extract in dyeing process under optimized conditions was found to be 72%. Kinetic models explain adsorption using different adsorption isotherms. The leathers were treated with different pre‐ or post‐mordants dyeing with mekmeko, and multiple colors were obtained depending on the types of mordants used. The overall results in this study indicated that the mekmeko‐dyed leathers exhibit good fastness and organoleptic characteristics.

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Section: Ann Augmented With Genetic Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rumex abyssinicus (mekmeko) extract as cleaner approach for dyeing in product manufacture: Optimization and modeling studies

Mohammed

Panda

Madhan

et al. 2017

Asia-Pacific J Chem Eng

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“…So, it is of significant importance to handle these leather wastes reasonably. Leather waste is abundant in collagen fibers, which offer many functional groups (such as amino, carboxyl, and hydroxyl groups) for applying lots of fields 2–5 …”

Section: Introductionmentioning

confidence: 99%

Construction of waste‐collagen modified superfine fiber substrates based on “click” chemistry: Moisture absorption and permeability

Xing

Wang

et al. 2021

J of Applied Polymer Sci

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Superfine fiber synthetic leather is a high‐grade artificial leather product with numerous characteristics and advantages. However, compared with natural leather, it shows poor moisture absorption and moisture permeability, and it gives people a hot and tacky feeling; thus, the improvement of these properties has become a popular topic in the industry. In this paper, the “click” chemistry method was employed to modify the nylon fiber of the superfine fiber synthetic leather base with waste collagen to improve the moisture absorption and permeability of the superfine fiber synthetic leather base, thus enhancing the hygienic performance and wearing comfort of the end products, realizing waste recycling. This study obtained the optimal reaction conditions for the “click” modification of unfigured sea‐island superfine fiber synthetic leather base with collagen methacrylamide. The characterizations by static contact angle measurements, attenuated total reflection infrared spectroscopy, and X‐ray photoelectron spectroscopy analysis confirmed that collagen was successfully grafted onto the surface of the nylon fiber. Compared with the original base, the moisture absorption, and permeability of the base were improved by 602.4% and 43%, respectively. This study shows the theoretical research significance and excellent practical value for the resource utilization of skin collagen waste.

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“…For this reason researches (Haroun and Mansour, 2008;Danylkovych et al, 2016) are being done, dealing with the use of chemicals which can influence the colour and aesthetic qualities of finished leather positively without damaging its consumer properties in liquid finishing processes. To understand the interaction between collagen of derma, materials used and dyes better various analytical methods are used, such as the method of Fourier infrared spectroscopy (Sudha et al, 2016;Pellegrini et al, 2015;Campos Vidal and Mello, 2011;Sukhodub et al, 2004;Kanagaraj et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Improving of Leather Liquid Finishing through Usage of Polymeric Compounds

Nikonova¹,

Andreyeva²,

Maistrenko³

2016

The International Conference on Advanced Materials and Systems

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Nowadays, leather industry is suffering from low quality of raw materials, usage of efficient and environment unfriendly materials. This situation may be corrected by upgrading the existing or developing new technologies using efficient chemical materials, such as polymeric compounds. The aim of the study was to improve the leather dyeing processes through usage of water-soluble polymers derivatives of acrylic and maleic acids in the direction of simplification and reduction of processing materials consumption, ensuring high product quality, establishing the mechanism of interaction between these materials and collagen. The reactions in the "collagen-polymeric compounds-dye" system were studied using IR-spectroscopy. The fiber preparation from the untanned leather industry waste was used for the collagen prototype. The data obtained show correlation between interaction type in the system under study as well as leather properties and processing conditions. We have established a positive effect of investigated polymers on the physical, mechanical, and hygienic leather properties. It can be explained through their ability to be absorbed on the surface of the derma structural elements; to interact with them and other applied reagents (tannins, dyes etc.), there by promoting structure formation and improving product quality.

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Cleaner approach in leather dyeing using graft copolymer as high performance auxiliary: related kinetics and mechanism

Cited by 23 publications

References 41 publications

Rumex abyssinicus (mekmeko) extract as cleaner approach for dyeing in product manufacture: Optimization and modeling studies

Rumex abyssinicus (mekmeko) extract as cleaner approach for dyeing in product manufacture: Optimization and modeling studies

Construction of waste‐collagen modified superfine fiber substrates based on “click” chemistry: Moisture absorption and permeability

Improving of Leather Liquid Finishing through Usage of Polymeric Compounds

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