借助流变曲线优化中性墨水配方

Optimizing the Formula of Gel Ink with Rheological Curve

摘要:

润湿剂、分散剂与树脂种类与添加量直接影响颜料型中性墨水体系中颜料粒子的分散、稳定与触变体系的构建。分别考察了不同添加量的分散剂BYK–191所制备的墨水色浆，以及不同添加量的苯丙树脂M101和润湿剂4187所制备的中性墨水的流变行为，并借助激光粒度仪、光学显微镜、表面张力仪对颜料的分散粒径、微观成像、临界胶束浓度进行了分析，首次将流变仪用于中性墨水配方优化。结果表明，当墨水中添加2.0%（质量分数）分散剂 BYK–191、4.0%（质量分数）苯丙树脂M101和2.5%（质量分数）润湿剂 4187时，既保证了中性墨水触变体系的良好建立，又实现了颜料的超细分散与长期稳定。

Abstract:

The type and dosage of dispersant, resin and wetting agent directly affect the dispersion and stability of pigment particles and the construction of thixotropic system in pigment gel ink system. The rheological behavior of pigment slurry with different amount of dispersant BYK–191, and gel ink with different quantities of styrene acrylic resin M101 and wetting agent 4187 was investigated. The particle size of pigment, microscopic imaging, CMC (critical micelle concentration) were studied by laser particle analyzer, optical microscope and surface tensiometer. Besides, it was the first time to use rheometer to optimize the gel ink formula. It turned out that not only a well thixotropic system of gel ink but also the ultra-fine dispersion and long-term stability of pigment could be realized when the adding quantity（mass fraction）of dispersant BYK–191, styrene acrylic resin M101 and wetting agent 4187 reached 2.0%, 4.0% and 2.5%, respectively.