【摘要】 通过对皮坯鞣前预处理工艺、鞣制工艺的优化及鞣革效果的评价,提出了纳米SiO2鞣革方法及其优化后的工艺参数。试验结果表明:鞣制前的预处理、鞣制时纳米SiO2的用量、pH值及作用时间,对鞣革效应和成革性能有较大的影响。鞣制终点的pH值控制在5~6时,鞣制时间大于10h,SiO2的含量控制在质量分数5%左右,成革收缩温度(Ts)能达到93℃。扫描电镜分析(SEM)表明:当纳米SiO2含量适中时,SiO2粒子在革纤维间分布均匀且粒径在纳米尺度内;当SiO2含量较高时,SiO2粒子在革坯面聚集,粒径在400nm左右。纳米SiO2鞣革的成革颜色洁白,柔软丰满,粒面平细,力学性能达到无铬鞣标准。更多还原

【Abstract】 A novel tanning method of nano–SiO2 and the optimized technical parameters were put forward based on studies involving the selection of pre-treating methods of pickled pelt and the optimization of tanning condition together with the evaluation of the leather properties The results indicate that the tanning efficiency and leather properties are closely related to the process of pre-treating of pickled pelt, the content of nano–SiO2, the pH value of the bath and the mechanical action time The shrinkage temperature(Ts)of resultant leather can reach 93℃ when the final pH value of the drum is 5~6, the tanning time is more than 10 hours and the SiO2更多还原