杨梅栲胶的极性分离物与皮革中六价铬的抑制  

Polatrity Isolate of Bayberry Tannin Extract and Control of Hexavalent Chromium in Leather

作　　者：易宗俊[1] 马兴元[1] 俞从正[1] 王瑞[1] 王俊君[1] 

机构地区：[1]陕西科技大学资源与环境学院,陕西西安710021

出　　处：《中国皮革》2008年第17期8-12,共5页China Leather

基　　金：国家自然科学基金(20676067)资助

摘　　要：通过对制革中常用栲胶抗氧化性的测定,优选出杨梅栲胶进行超声波辅助极性分离,得到了抗氧化性较强的组分以及较优的分离条件,并将分离产物应用于皮革中六价铬的防治。研究结果表明:杨梅栲胶通过极性分离得到的组分,较原杨梅栲胶的抗氧化性明显增强。将1.5%的杨梅栲胶极性分离组分应用于皮革复鞣时,能有效降低皮革中六价铬的含量;在85℃高温处理24h或220V、60W紫外灯强光垂直照射24h等条件下,皮革中的六价铬含量都小于5mg/kg,符合生态皮革的六价铬限制标准;该分离组分对坯革的颜色和手感没有影响。Antioxidant activities of some tannin extract were measured and the extract of myrica bark was closed for the extraction and separation by ultrasonic wave assiste. The components of stronger antioxidative action and optimal conditions of extraction was obtained, and the applied experiment in leather was also carried out. The results show that the antioxidative action of isolate is much stronger than the original tannin extract. When the myrica bark extraction was used in leather retanning by 1.5% ,it could well control the content of hexavalent chromium. And under the conditions of 85℃ for 24hours or 220V ,60W ultraviolet radiation light for 24 hours, the hexavalent chromium in leather was also less than 5mg/kg, which accord with the standard of ecological leather. The myrica bark extraction has no bad effect on the color and handle of green leather after retanning.

关 键 词：皮革 杨梅栲胶 六价铬 超声波辅助极性分离 抗氧化性 

分 类 号：TS51[轻工技术与工程—皮革化学与工程]