清洁高吸收铬鞣工艺的研究  

STUDIES ON CLEANER TECHNOLOGY OF HIGH EXHAUSTION CHROME TANNING

作　　者：许伟[1] 王玺龙[1] 郝丽芬[1] 

机构地区：[1]陕西科技大学轻化工助剂化学与技术教育部重点实验室,陕西西安710021

出　　处：《陕西科技大学学报（自然科学版）》2009年第4期27-30,47,共5页Journal of Shaanxi University of Science & Technology

基　　金：陕西科技大学自然科学基金项目(ZX08-05)

摘　　要：为提高常规铬鞣法的铬利用率,用单因素实验方法研究硅酸钠分别在碱、酸性区域内预处理山羊酸皮,然后再铬鞣的工艺实验.结果表明,碱性区域内硅酸钠的预处理效果较好;7.5%的硅酸钠处理3 h可使皮收缩温度(Ts)达68℃,适合于削匀.此外,硅酸钠预处理酸皮后可增加铬鞣过程中的铬吸收率,达91%,而铬鞣废液中的铬离子浓度可降低为960 ppm,5%的铬粉即可使皮Ts达104℃.扫描电镜分析及成革性能检测显示,硅铬鞣革坯与铬鞣革坯的粒面及纵截面的显微结构无太大区别,成革机械性能与常规铬鞣成革相当,Ts稍高于铬鞣革坯.To enhance absorptivity of chromium（ Ⅲ ） ion from traditional chrome tanning, tanning experiments of pickled goat skin were performed in this article,pretreated by sodium silicate under acidic and basic conditions and then tanned with chromium salts. Results indicate that performances of skin pretreated under alkaline condition are better than those under acidic condition, shrinkage temperature of skin treated by 7. 5% sodium silicate for 3 hours can attain 68 ℃ and which can be adapted to shaving. Moreover, silicates combined with collagen fibres can increase adsorpitivity of chromium to 91% and decrease concentration of chromium （Ⅲ） ion in tanning effluents to 960 ppm that Ts of skin tanned with 5% chromium salts can attain 104 ℃. Results from scanning electron microscopy （SEM） and physic-mechanical properties show that the performances of experimental leather are on par with conventionally processed leather. Ts of experimental crust leather is slightly higher than contrast crust leather.

关 键 词：高吸收铬鞣 清洁工艺 硅酸钠 

分 类 号：TS543[轻工技术与工程—皮革化学与工程]