Screening of additives to reduce grain damage risk on unhairing by proteinase K
作者机构：Key Laboratory of Leather Chemistry and Engineering of Ministry of EducationSichuan UniversityChengdu 610065China Chengdu Technological UniversityChengdu 611730China National Engineering Laboratory for Clean Technology of Leather ManufactureSichuan UniversityChengdu 610065China
出 版 物：《Journal of Leather Science and Engineering》 (皮革科学与工程（英文）)
年 卷 期：2020年第2卷第1期
页 面：196-204页
学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学]
主 题：Enzymatic unhairing Grain damage Proteinase K Inhibitor Leather making
摘 要：Enzymatic unhairing is a cleaner strategy for *** is a potential alternative to the traditional hairburning ***,several shortcomings,such as uncontrolled enzymatic reaction,and risk of grain looseness and damage have restricted the broad application of enzymatic *** this work,metal ions and organic additives were screened for lessening the hydrolytic activity of proteinase K to collagen ***,the selected additives were applied to the enzymatic unhairing process for bovine *** results showed that a suitable concentration of metal ions(Cu(Ⅱ),Fe(Ⅲ)and Al(Ⅲ))and organic additives(salicylate,laurate,adipate,gallate and epicatechin(ECG))could diminish approximately 35% of the hydrolytic activity of proteinase K to collagen ***,the additives were applied for the bovine hide enzymatic unhairing *** determination in the unhairing float shows that applying additives could reduce collagen *** morphology results showed that the grain damage could be significantly reduced with the addition of the screened additives in the proteinase K enzymatic unhairing system,whereas the addition of ECG and gallate significantly slowed down the unhairing *** outcome provides new potential to reduce the risk of grain damage in enzymatic unhairing process.
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