【摘要】 通过K/S值、红外光谱、X-射线衍射、DSC-TGA及酸溶解率等测试,并用苏木精作为苏木色素的模拟物进行反应动力学实验,分析环氧交联剂EH对苏木染料直接染棉织物时的交联固色作用。结果表明,在实验条件下,氧化苏木精与环氧交联剂的反应为假一级反应。环氧交联剂在碱性条件下同时与氧化苏木精分子中的酚羟基和纤维素分子中的羟基发生了醚化交联反应,与纤维素分子的交联反应主要发生在棉纤维的无定形区。更多还原

【Abstract】 The effect of epoxy crosslinking agent EH on the color fixation of cotton directly dyed with natural brazilwood dye was analyzed by K/S value,FT-IR,X-ray,DSCTGA and acid-dissolving rate testing,and reaction kinetics experiment was performed using hematein as a substitution for brazilwood dye.The results showed that under experiment conditions the reaction between hematein and epoxy crosslinking agent follows pseudo-first-order kinetics,and under alkaline condition epoxy crosslinking agent reacts simultaneously with both the hydroxy groups of hematein and cellulose.The cross linking reaction with cellulose mostly occurs in the amorphous region.更多还原