2020
DOI: 10.1186/s42825-020-00032-1
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Screening of additives to reduce grain damage risk on unhairing by proteinase K

Abstract: Enzymatic unhairing is a cleaner strategy for leather-making. It is a potential alternative to the traditional hair-burning process. However, several shortcomings, such as uncontrolled enzymatic reaction, and risk of grain looseness and damage have restricted the broad application of enzymatic unhairing. In this work, metal ions and organic additives were screened for lessening the hydrolytic activity of proteinase K to collagen fiber. Then, the selected additives were applied to the enzymatic unhairing proces… Show more

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Cited by 5 publications
(4 citation statements)
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“…9 However, this method has some shortcomings, such as grain looseness and damage due to its uncontrolled reactivity. 10 The action of enzymes on the skin cannot be controlled and is less viable for industrial applications. In order to overcome this drawback and also the high cost of enzymes, enzymes immobilized on solid support have been used in various other industries with ensured enzyme delivery, stability, and recyclability.…”
Section: ■ Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…9 However, this method has some shortcomings, such as grain looseness and damage due to its uncontrolled reactivity. 10 The action of enzymes on the skin cannot be controlled and is less viable for industrial applications. In order to overcome this drawback and also the high cost of enzymes, enzymes immobilized on solid support have been used in various other industries with ensured enzyme delivery, stability, and recyclability.…”
Section: ■ Introductionmentioning
confidence: 99%
“…The application of enzymes in the solution form has its own advantages, i.e., homogeneous form that can diffuse strongly into the skin and facilitates the unhairing process . However, this method has some shortcomings, such as grain looseness and damage due to its uncontrolled reactivity . The action of enzymes on the skin cannot be controlled and is less viable for industrial applications.…”
Section: Introductionmentioning
confidence: 99%
“…Ultrasound has been found to enhance numerous steps in the leather processing chain, including soaking, degreasing, unhairing, liming, fatliquoring, dyeing, and wastewater treatment. [6][7][8][9][10][11][12]. Ultrasound has matured into a technology that effectively improves the efficiency of various manufacturing processes, including the production of different materials.…”
Section: Introductionmentioning
confidence: 99%
“…Chromium and its compounds are widely used in electroplating, leather making, steel making, printing, dyeing, and other industries. Different methods of chromium plating can improve metal properties in different aspects [ 1 ] ; chromium carbide can be used as grain inhibitor which is better than niobium, [ 2 ] greatly improving the toughness, bending resistance, and oxidation resistance of steel in the process of steelmaking [ 3 ] ; the leather obtained by chrome tanning has the characteristics of softness, fullness, high strength, good moisture resistance, and stability, and other irreplaceable excellent properties [ 4,5 ] ; more than 90% of leather production in the world adopts the chrome tanning method, and the annual demand for the chrome tanning agent Cr 2 O 3 reaches 400 000 tons. [ 6 ] At the same time, the discharge of chromium‐containing wastewater is also great.…”
Section: Introductionmentioning
confidence: 99%