没食子酸防治皮革中六价铬机理的研究  

Mechanism of Gallic Acid for Preventing Chromium ( Ⅲ) to Chromium ( Ⅵ) in Leather

作　　者：胡强[1] 俞从正[1,2] 张玲 

机构地区：[1]陕西科技大学资源与环境学院,陕西西安710021 [2]浙江温州轻工研究院,浙江温州325003

出　　处：《中国皮革》2011年第7期14-18,29,共6页China Leather

基　　金：温州市对外科技合作交流项目(项目编号:H20090029);陕西科技大学研究生创新基金资助

摘　　要：以芬顿试剂所产生的羟基自由基来代替成分复杂的加脂剂被氧化所产生的羟基自由基,用成分单一的三氯化铬溶液模拟皮革铬鞣剂。在三氯化铬-芬顿体系,以及芬顿-没食子酸-三氯化铬体系中进行反应,定期测定溶液中六价铬含量,以此来探究羟基自由基对三价铬的氧化作用,以及没食子酸对羟基自由基的清除效果。将皮质量4%的没食子酸应用到皮革加脂中,结果显示:没食子酸能防止皮革中的三价铬向六价铬转化,即使在高温加热和紫外光照射3d的过程中,皮革中六价铬含量始终小于5mg/kg,符合生态皮革对六价铬含量的要求。In order to clearly discuss the oxidation mechanism of Cr（ Ⅲ） to Cr（ Ⅵ） ,the hydroxyl radical which generated from Fenton reagents was used to replace hydroxyl radical from complicated fatliquor,the solution of chrome trichloride was used to simulate chrome liquid. The Cr（ Ⅵ） content was determined regularly in the system of chrome trichloride-Fenton and Fenton - gallic acidchrome trichloride. The oxidation effects of the hydroxyl radical on Cr（ Ⅲ） ,and the elimination effects of gallic acid on hydroxyl radical were investigated. The 4% gallic acid was used when fatliquoring,and the results show that gallic acid has the good ability to reduce the content of chromium （ Ⅵ） in the leather. The content of chromium（ Ⅵ） in the leather is less than 5mg/ kg and meet the standard of the ecological leather even after heating and enlightening under ultraviolet light for 3 days.

关 键 词：六价铬 芬顿试剂 没食子酸 加脂 皮革 

分 类 号：TS513[轻工技术与工程—皮革化学与工程]