甜菜碱改性聚乙烯胺在活性染料染色中的作用及影响

Effect of Betaine Modified Polyvinylamine Modifier on Reactive Dye Dyeing

通过1-(3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐(EDC)/N-羟基琥珀酰亚胺(NHS)接枝法使用甜菜碱对聚乙烯胺进行化学接枝,并固定在棉纤维上使其阳离子化,解决了传统染色过程中大量使用无机盐造成的水污染问题。与传统使用无机盐上染法相比,由于棉纤维阳离子化增加了染料与纤维之间的亲和力,该方法上染率由40.8%提高至78.0%,匀染性和染色牢度均得到提升,染色废水的化学需氧量(COD_(cr))由1267 mg/L降低至221 mg/L。方法操作简单效果优良,符合当前绿色生产的理念,可以被广泛应用于棉纤维材料的染色。

1-(3-Dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride(EDC)/N-hydroxysuccinimide(NHS)grafting method was employed to chemically graft polyvinylamine with betaine onto cotton fiber to make it cationic,which solved the problem of water pollution caused by the large use of inorganic salts in the traditional dyeing process.As the cationic of cotton fiber increases,the affinity between dyes and fibers increases,compared with the traditional inorganic salt dyeing method,the dyeing rate of our method is increased from 40.8%to 78.0%,the levelness and color fastness are improved,and the chemical oxygen demand(COD_(cr))of dyeing wastewater is reduced from 1267 mg/L to 221 mg/L.This method is of simple operation and excellent effect,meeting the current concept of green environmental protection,and can be widely used in fabric dyeing.