染色法测定棉织物上壳聚糖的含量

Determination of chitosan content finished on cotton fabrics by dyeing method

利用毛用活性染料Doractive WN3BR与壳聚糖中氨基反应的特性,对经壳聚糖整理的棉织物进行染色,测定其K/S值,发现K/S值与整理到棉织物上的壳聚糖含量在0～15 mg/g（棉织物）范围内呈现良好的线性关系（R=0.997 3）。通过氮元素含量测试,验证壳聚糖含量与经壳聚糖整理的棉织物染色后的K/S值之间的线性关系,绘制标准工作曲线,从而建立一种通过测试K/S值来评估纯棉织物中壳聚糖含量的有效方法,该方法具有简便、快速、偏差小的特点。

The reactivity of reactive dye Doractive WN3BR with the amidogen of chitosan was utilized for determination of chitosan content on cotton fabric. Chitosan finished cotton fabric was dyed, its color yield （ K/ S value） was measured, and the K/S value was found to have a good linear relationship （ R = 0.997 3） with the content of chitosan which has been finished on the pure cotton fabric in the range of 0 - 15 mg/g （cotton fabric）. Through measuring the content of nitrogen, the good linear relationship between the chitosan content and the K/S value of the cotton fabric finished with chitosan was proved and the standard working graph was set up. On this basis, a measurement of content of chitosan finished on pure cotton fabric was established by measuring the color yield of dyed cotton. This measurement is simple, fast and less deflective.