活性染料结构对彩色聚合物纳米球性能的影响

Effect of reactive dye structure on performance of colored polymer nanospheres

为提高彩色聚合物纳米球的染料负载量及着色性能,选取含不同数量磺酸基的活性染料和阳离子聚合物纳米球,制备了不同的彩色聚合物纳米球。通过平衡透析法,借助透射电子显微镜和纳米粒径/电位分析测试仪,探讨了含有不同数量磺酸基活性染料的浓度对彩色聚合物纳米球的染料吸附量、水合粒径及Zeta电位的影响。结果表明:相同染料浓度下,含有磺酸基越多的活性染料在阳离子纳米球上的吸附量越大;当磺酸基数量相同时,疏水性越强的活性染料在阳离子纳米球上的吸附量越大;彩色聚合物纳米球的染料吸附量随着染料浓度增加而增加;Zeta电位的绝对值随染料浓度呈现先减小后增大的趋势,平均水合粒径呈现先增大后减小的趋势。

In order to improve the dye loading and coloring properties of the colored polymer nanospheres,polymer nanospheres with different colors were prepared by cationic composite nanospheres and reactive dyes which contain different amounts of sulfonic acid groups.The effects of the concentrations of sulfonic acid-based reactive dyes on the dye adsorption,particle size and zeta potential of the colored polymer nanospheres were investigated by equilibrium dialysis,transmission electron microscopy and nanoparticle size/Zeta potential analyzer.The results show that the more sulfonic acid groups were on the cationic nanospheres the greater was the adsorption of reactive dyes at the same dye concentration.When the number of sulfonic acid groups was the same,the more hydrophobic the reactive dyes were,the greater the adsorption amount on the cationic nanospheres.In addition,the amount of dye adsorbed by the color polymer nanospheres increased with increasing dye concentration.The absolute value of Zeta potential decreased followed by an increase,while the average hydrated particle size increased first and then decreased.