表面活性剂助剂对水性基墨性能的影响

Effect of Surfactants on Properties of Water-based Ink

目的通过研究表面活性剂对水性基墨干燥性能、颜色性能和流变性的影响规律,得到选择表面活性剂助剂的理论基础。方法选用阴离子、非离子和阴/非三类6种表面活性剂助剂,利用流变仪和表面张力仪等测量助剂加入前后水性基墨粘度、表面张力、接触角、色密度、光泽度等的变化规律。结果6种助剂加入后对水性基墨在薄膜上的润湿性影响较小;阴离子表面活性剂能够降低水性基墨的动态表面张力和粘度,降低色密度,提高稳定性;非离子表面活性剂可以提高水性基墨的干燥速率;阴/非复合助剂和阴离子表面活性剂有利于提高水性基墨的综合性能。结论助剂对水性基墨性能影响复杂,要考虑综合效果选择使用。

The work aims to obtain the theoretical foundation for the selection of surfactant by studying the law of influence of surfactants on the drying property, color property and rheological property of water-based ink. By selecting six surfactants from such three types as anionic, nonionic and anion/non-ionic surfactants, the change law of viscosity, surface tension, contact angle, color density and glossiness, etc. of the water-based ink before and after the addition of surfactants were measured with the rheometer and surface tension meter, etc. After the addition of six surfactants, the wettability of water-based ink on the film was less affected. The anionic surfactant could reduce the dynamic surface tension and viscosity, reduce the color density and improve the stability of water-based ink. Non-ionic surfactants could improve the drying rate of water-based ink. Anionic/non-composite auxiliaries and anionic surfactants helped improve the overall performance of water-based inks. In conclusion, the surfactants have complex influence on the properties of water-based ink and they should be selected by considering their comprehensive effects.