Effect of the surface charge of the acid protease on leather bating performance

Liu, Chang; Chen, Xuyang; Zeng, Yunhang; Shi, Bi

doi:10.1016/j.procbio.2022.07.023

Cited by 6 publications

(2 citation statements)

References 33 publications

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“…In particular, enzyme is also a category of amphoteric biomacromolecule. The uniform penetration and satisfactory catalysis of an enzyme are largely influenced by its electrostatic interaction with skin [4,5]. Skin/leather is known as a 3D hierarchical fiber network with a thickness of 1-8 mm.…”

mentioning

confidence: 99%

Essential role of isoelectric point of skin/leather in leather processing

Wang

2022

J Leather Sci Eng

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confidence: 99%

Essential role of isoelectric point of skin/leather in leather processing

Wang

2022

J Leather Sci Eng

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“…Furthermore, non-collagenous proteins remaining in hide can cause a lack of flexibility and firmness in dried leather [ 4 ]. For interfibrillar substances, the removal of alkaline or neutral proteases is carried out; nevertheless, new studies show the possibility of acid protease application in bating [ 7 , 8 , 9 , 10 ]. Currently, proteases used in bating are derived from non-hazardous microorganisms.…”

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confidence: 99%

Wet Blue Enzymatic Treatment and Its Effect on Leather Properties and Post-Tanning Processes

Biškauskaitė

Valeika

2023

Materials

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Due to their variety, specific activity, and mild reaction conditions, enzymes have a wide application in beam house processes such as soaking, dehairing, bating, and de-greasing. Recently, due to improvements in biotechnology, re-bating after chroming has received increased attention. The aim of this work was to investigate the application of enzyme preparation in the re-bating process and its effect on the semifinished and finished product, as well as its influence on post-tanning operations. The enzymatic treatment of chromed semifinished leather (wet blue) led to a higher shrinkage temperature (1–6 °C), greater water vapour absorption (0.3–5.5%), better chromium compounds exhaustion during re-chroming (4–21%), and better dye penetration. Moreover, collagen was affected during the enzymatic process; the results showed a greater concentration influence in the operation compared to the process time. On the other hand, no effect on the physical and mechanical properties and fat-liquoring process was observed. Overall, these results indicate that some properties and processes are improved; however, before use for re-bating, every enzyme should be carefully investigated.

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