季铵醚化改性对磷酸酯淀粉浆料性能的影响

Effects of quaternary ammonium cationic modification on starch phosphate sizing agents

为提高磷酸酯淀粉浆料的使用性能,通过改变3-氯-2羟丙基三甲基氯化铵醚化剂对磷酸酯淀粉的投料比,制备了一系列具有不同季铵醚阳离子取代度的磷酸酯变性淀粉。通过性能对比试验,研究这种变性淀粉的季铵阳离子化变性对浆液ζ电位、黏度以及黏附性能和浆膜性能的影响。结果表明:随着季铵阳离子取代度的增加,这种变性淀粉浆液的ζ电位升高,黏度明显提高;季铵阳离子化变性能够进一步改善磷酸酯淀粉对棉纤维的黏附性能;随着阳离子取代度的增加,对棉纤维的黏附性能增大,浆膜的断裂伸长率增大。

In order to improve the serviceability of starch phosphate, a series of starch phosphate with different amount of quaternary ammonium groups were prepared by varying the feed ratio of N-（3-chloro-2- hydroxyproply） trimethylammonium to starch phosphate. The influence of cationic modification on ξ-potential, paste viscosity, adhesion to cotton fibers, and film behaviors were evaluated by control tests. The experiment results demonstrated that t-potential and viscosity of the modified starch paste increases as the degree of substitution of cationic groups increases. The modification further improves the adhesion of starch phosphate to cotton fibers. With the increase of the degree of substitution, the adhesion enhances and the elongation-at- break of starch film increases.