New approaches for the reactive dyeing of the retanned carbohydrate crust leather

Haroun, Ahmed A.; Mansour, Heba F.

doi:10.1016/j.dyepig.2006.08.028

Cited by 12 publications

(11 citation statements)

References 9 publications

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“…The absorbance was shown at 270 and 310 nm due to the adsorption of tannin acid contained in the extracted dye (Jeyakodi and Murugajothi, 2008). This demonstrated that the major pigment of T. chebula extract is a tannin component (Jeyakodi and Murugajothi, 2008; Haroun and Mansour, 2008). Therefore, the dye extracted from T. chebula is suitable as a natural dye for leather dyeing.…”

Section: Resultsmentioning

confidence: 99%

“…Generally, the functional molecules in flavourzyme are highly active at around 50°C. However, a prolonged increase to 60°C resulted in a decrease in the uptake of dye because the molecular structure of the enzyme began to be denatured at a higher temperature, which led to its inactivation (Kanth, Venba, Madhan, Chandrababu and Sadulla, 2008; Kanth, Venba, Jayakumar and Chandrababu, 2008; Ma et al , 2014; Haroun and Mansour, 2008). Therefore, the optimum temperature for flavourzyme was found to be 50°C.…”

Section: Resultsmentioning

confidence: 99%

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Improvement of dye affinity in natural dyeing usingTerminalia chebula retzius(T. chebula) applied to leather

Song

Kim

2017

IJCST

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Purpose The purpose of this paper is to improve the dye affinity of natural dye of Terminalia chebula retzius (T. chebula) using the dye substrate of leather. Design/methodology/approach The dyeing conditions such as temperature, concentration of dye, and time are controlled by measuring the dye affinity. The effect of enzymatic post-tanning process on dye affinity is evaluated by using different type of proteases such as flavourzyme, alcalase, and bromelain. The optimum conditions for enzymatic post-tanning process are evaluated depending on different pH, temperature, and concentration of enzyme. Findings The highest dye affinity was obtained at 50°C using a dye concentration of 200 percent (owf) for 30 min treatment by measuring of K/S values of dyed leather. Distilled water was proved as a better extraction liquid to improve the dye affinity of T. chebula. The K/S values of dyed leather were enhanced after the enzymatic post-tanning process by flavourzyme. Moreover, the fastness properties against the rubbing and dry cleaning of the dyed leather were improved by the enzymatic post-tanning process. Originality/value In this paper, the enzymatic post-tanning process is introduced as the method to improve the dye affinity in natural dyeing using Terminalia chebula retzius (T. chebula) applied to leather. The results of the study could be applied for further natural dyeing of leather using various natural dyes.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Improvement of dye affinity in natural dyeing usingTerminalia chebula retzius(T. chebula) applied to leather

Song

Kim

2017

IJCST

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“…In the textile field, the Maillard reaction of glucose, xylose, dextrose, and galactose with amino groups in wool fiber has been applied to enhance the uptake of reactive and acid dyes [4]. In the leather field, carbohydrates are used as retanning agents to increase the affinity of reactive dyes to crust leather; to achieve this purpose, the modified Maillard reaction is employed, where crust leather is firstly treated by carbohydrates and then oxidized by potassium iodate [5]. More recently, the Maillard reaction has been applied to the in situ coloration of wool, silk, and nylon fibers with various reducing sugars, which imparts yellow and orange-brown colors, as well as good antibacterial performance to these fibers [6,7].…”

Section: Introductionmentioning

confidence: 99%

Application of the Products from the Maillard Reaction of Polyglutamic Acid and Glucose to Prepare Colored and Bioactive Silk

Wen

2018

Polymers

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Abstract:In this work, the Maillard reaction of polyglutamic acid (PGA) and glucose (Glc) was studied, and its functional, polymeric, and colored products were used to dye silk fiber with the aim of imparting bioactivities to silk. The UV-Vis spectroscopic analysis, which was employed to monitor the reaction, revealed the rapid formation of yellowish-brown products at pH 12 and 90 • C, and the great impact of glucose content on the quantity of the products. The FT-IR analysis validated the formation of melanoidin colorants. The silk fiber dyed with the PGA/Glc reaction products at pH 3 displayed a yellowish-brown color, and had very good wash and rub fastness, but poor light fastness. The incorporation of the UV-absorbing moiety into the PGA/Glc reaction products enhanced their light stability. The SEM analysis revealed that the dyed silk fiber was covered by polymeric substances. The dyed silk exhibited durable antibacterial activity against Staphylococcus aureus and Escherichia coli, and good antioxidant activity. This research expands the application field of the Maillard reaction and provides a novel and eco-friendly approach to prepare the colored and bioactive silk materials.

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“…Uno de los procesos intermedios del tratamiento de las pieles es la recurtición; existe una gran variedad de productos utilizados en este proceso que se puede agrupar en productos catiónicos -tipo de sales metálicas como sales de cromo-, aniónicos -tipo extracto- (Sundar, Muralidharan, & Mandal, 2013), sintéticos de sustitución, acrílico orgánico o naturales (colágeno y enzimas) que influyen en la carga del cuero, mejorando la capacidad de teñido de la piel (Burkinshaw & Kitching, 1995;Mitchell & Ouellette, 1996, Haroun, 2005Haroun & Mansour, 2008;Krishnamoorthy, Sadulla, Sehgal, & Mandal, 2013).…”

Section: Introductionunclassified

Hidrolización de cueros en azul para la obtención de producto recurtiente útil en las tenerías con bajo impacto ambiental

2014

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Los retales curtidos obtenidos en las tenerías son desperdicios que, por su alto contenido en sales de cromo son muy tóxicos para el ser humano, los sistemas acuíferos y la flora vegetal. Con la finalidad de darles una disposición adecuada se ha utilizado una diversidad de métodos, la mayoría con muy pobre rendimiento. En esta investigación se aprovecha los retales sobrantes de cuero curtido (cuero en azul), para su posterior hidrolización en medios ácido y básico con fines de ser utilizado como recurtiente. El tiempo de hidrolizado se disminuye con el incremento del agente hidrolizante y a su vez se incrementa la cantidad de reactivo neutralizante a utilizar. La hidrólisis ácida genera un producto con menor porcentaje de cenizas, grasas y cromo, pero con un mayor porcentaje de proteína. La respuesta del recurtido con respecto a un producto comercial mostró acabados similares en color, tacto, llenado y calidad del recubrimiento; las características físicas del cuero tratado con el hidrolizado de colágeno cumplen con la normatividad vigente en las propiedades de tracción, desgarre y ruptura de flor. Con el aprovechamiento de los retales se brinda una metodología a bajo costo que contribuye al mejoramiento del medio ambiente y al proceso de obtención de cuero.

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New approaches for the reactive dyeing of the retanned carbohydrate crust leather

Cited by 12 publications

References 9 publications

Improvement of dye affinity in natural dyeing usingTerminalia chebula retzius(T. chebula) applied to leather

Improvement of dye affinity in natural dyeing usingTerminalia chebula retzius(T. chebula) applied to leather

Application of the Products from the Maillard Reaction of Polyglutamic Acid and Glucose to Prepare Colored and Bioactive Silk

Hidrolización de cueros en azul para la obtención de producto recurtiente útil en las tenerías con bajo impacto ambiental

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