中性墨水颜料吸附性与分散稳定性研究

Study between Gel Ink Pigment Adsorption and Dispersion Stability

摘要:

中性墨水的流变性和颜料分散稳定性是影响中性墨水品质的两个重要因素，这两个因素又直接受到分散树脂、增稠剂种类与稳态吸附量的影响。本文考查了不同颜基比下增稠剂吸附颜料粒子的量对墨水表观黏度及触变值的影响，并在理想条件下，选择复配碱溶胀型增稠剂对墨水流变性和稳定性进行研究。结果表明，分散树脂与增稠剂对颜料粒子存在动态竞争吸附；当墨水体系中颜基比为3:1，借助0.4% ALCOGUARD 5800与1.0% T-938复合增稠，所制备的中性墨水具有良好的流变性能与分散稳定性。

Abstract:

The gel ink rheological property and dispersion stability of pigment were influenced by the type and steady adsorption capacity of thickener and dispersion resin，which matter the fit and unfit quality of gel ink. It was investigated that the adsorption quantity of thickener to the pigment particles affected the gel ink apparent viscosity and thixotropic value for different ratio of pigment to resin, then the rheological property and stability of gel ink under the composite alkali soluble thickeners and properly condition were studied. The results showed that there was a dynamic competitive adsorption between dispersion resin and thickener. And it also turned out that the fine rheological property and well stability of gel ink system could be realized when the adding quantity (mass fraction) of thickener ALCOGUARD 5800 and T-938 reached 0.4% and 1.0% for the ratio of pigment to resin (3:1).