甲醛捕获剂去除栲胶-噁唑烷鞣革中游离甲醛的研究

Research on the Capturing Formaldehyde on Tannin Extract-Oxazolidine Combinated Leather

针对栲胶-噁唑烷鞣革中游离甲醛含量过高的缺点,采用六种甲醛捕获剂去除甲醛,结果表明:乙酸铵、尿素、端氨基树枝状聚合物、淀粉、水解胶原产物、活泼亚甲基聚合物这6种捕获剂均可降低栲胶-噁唑烷鞣革中的游离甲醛含量,其中端氨基树枝状聚合物去除甲醛效果最好。当端氨基树枝状聚合物的用量为1.5%,作用时间为1.5h,pH为6.0,应用到栲胶-噁唑烷鞣革中甲醛去除率为72.06%,同时对革坯有明显的增厚作用。

In order to decease the free formaldehye in tannin extract-oxazolidine combinated leather,six formaldehyde capture agents were introduced to remove formaldehyde.The formaldehyde removal efficiency of dendritic polymer with terminal amino-groups was best between ammonium acetate,urea,dendritic polymer with terminal amino-groups,starch,hydrolyzed collagen and active methylene polymers.The parameters include the dosage of DPTA was 1.5%,the time was 1.5 h,and pH was 6.0,in this condition,the removal rate of for...