【摘要】 本文用UV及pH滴定法研究了铬(Ⅲ)同合成鞣剂的络合性。结果表明合成鞣剂中的磺酸基同铬(Ⅲ)的络合力较弱,不如硫酸根,其少量的酚羟基可能参与同铬(Ⅲ)的配位。由此推测合成鞣剂主要靠其官能团同胶原蛋白形成氢键及盐键来达到复鞣之作用。更多还原

【Abstract】 The paper investigated the complex ability of chromium ( Ⅲ ) with groups in synthetic tannin by means of UV ＆ pH titrimetry. The results showed that sulforadicals in synthetic tannin had weaker complex ability with Cr ( Ⅲ ) than sulfate radicals, but its hydrophenols coordinated proba bly with Cr (Ⅲ). It was thus clear that retanning effect of synthetic tannin depended mainly on formation of hydrogen and salt bond between the tannin and collagen protein.更多还原