可溶性淀粉深度改性及对山羊蓝湿革的填充作用

Advanced Modification of Soluble Starch and Its Filling of Wet-Chromed Goat Skin

通过两步改性可溶性淀粉制备淀粉浆,并探究其对浸酸山羊皮的作用及山羊蓝湿革的填充效果。第1步酸改性的优化条件为:反应温度85℃,盐酸用量为原淀粉质量的25%,反应时间60 min;第2步Fenton氧化改性的优化条件为:c(H2O2)=0.10 mol/L,c(Fe2+)=0.10 mol/L,改性温度40℃,改性时间60 min。经两步改性后的淀粉具有稳定胶原的功能,可显著提高浸酸山羊皮的收缩温度(最高可提高19.7℃),其w(羧基)和w(羰基)分别为2.07%和4.73%。用改性淀粉浆填充山羊蓝湿革,增厚率可达14.81%,样品的物理力学性能,均满足行业标准。

The modified soluble starch has been prepared by a two-step method, and then it was applied in the treatment of pickled goat skin and in the filling of wet-chromed goat skin. Research reveals that the optimal conditions for the first step modification are ： 85 ℃, w （HC1） = 25% , 60 rain ; The optimal conditions with Fenton oxidation are ：c（ H2O2 ） ---0. 10 mol/L, c （Fe2＋） = 0. 10 mol/L,40 ℃ and 60 min. The modified soluble starch prepared by the two-step method has certain tanning property which can increase the shrinkage temperature of pickled goat skin to as high as 19.7 ℃ ,and its carboxyl and carbonyl contents can reach 2. 07 % and 4. 73 % , respectively. The leather filled with the modified soluble starch gets obviously thickened（ as high as 14. 81% ）. The physical and mechanical property tests show that the leather samples conform to the industry standard.