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首页> 外文期刊>Colloids and Surfaces, A. Physicochemical and Engineering Aspects >Absorption and adsorption of dye-based inkjet inks by coating layer components and the implications for print quality
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Absorption and adsorption of dye-based inkjet inks by coating layer components and the implications for print quality

机译：涂层成分对染料基喷墨油墨的吸收和吸附及其对印刷质量的影响

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Inkjet printed surfaces should have good ink fastness properties so that the printed paper can be finished and remain durable during post-treatment and use. To achieve this, the ink colorant requires adequate fixing to the paper surface. In the case of coated inkjet papers, the coating layer surface is engineered to generate good printability using parameters of pore network structure, surface area and surface chemistry of coating pigment(s), and polymer additive properties. The aim of this work was to clarify how the ionic charge, and particularly its distribution in the coating layer, combines with binder to impact on the dye fixation properties of dye-based inkjet inks. The studied pigments were a specially chosen ionically surface-inert organo silica and a modified calcium carbonate (MCC) and binders were non-ionic polyvinyl alcohol (PVOH) and anionic styrene acrylate (SA) latex. Additionally, surface treatment, by applying a cationic polymer (polyDADMAC), was used to study the effect of surface charge on the ink penetration and the resulting print quality. The absorption/adsorption of ink colorant was studied with UV-VIS spectroscopy to evaluate the absorbance resulting from ink dye mixed with model coating structure suspensions, which were prepared by grinding, sieving and suspending in aqueous dispersion. The results showed that addition of PVOH into a coating formulation based on anionically dispersed coating pigment increased the colorant absorption/adsorption. The PVOH supports interpolymer diffusion of the polar ink vehicle, which opens the polymer matrix so that the colorant can transfer into the binder network and remain there. Additionally, providing an opposite charge between the coating and inkjet ink is well known to act to bind the colorant most effectively. When applied to paper, the use of a cationic additive application specifically to the coating layer surface slowed down the ink penetration into the paper structure, by reducing coating permeability, and bound the anionic colorant at the top layer by charge interaction, so that reduced bleeding and improved water fastness could be achieved.
机译：喷墨印刷表面应具有良好的油墨牢度性能，以便可以对印刷纸进行整理，并在后处理和使用期间保持耐用性。为此，油墨着色剂需要充分固定在纸张表面上。在涂布喷墨纸的情况下，使用孔隙网络结构，涂料颜料的表面积和表面化学性质以及聚合物添加剂性能等参数对涂层表面进行设计，以产生良好的可印刷性。这项工作的目的是阐明离子电荷，尤其是其在涂层中的分布如何与粘合剂结合，从而影响染料基喷墨油墨的固色性能。所研究的颜料是一种特殊选择的离子表面惰性有机硅和改性碳酸钙（MCC），粘合剂是非离子聚乙烯醇（PVOH）和阴离子苯乙烯丙烯酸酯（SA）胶乳。此外，通过应用阳离子聚合物（polyDADMAC）进行表面处理还用于研究表面电荷对油墨渗透性和所得印刷质量的影响。通过UV-VIS光谱学研究油墨着色剂的吸收/吸附，以评估油墨染料与模型涂料结构悬浮液混合后的吸光度，该模型涂料结构悬浮液是通过研磨，筛分和悬浮在水分散液中而制备的。结果表明，将PVOH添加到基于阴离子分散涂料颜料的涂料配方中，可增加着色剂的吸收/吸附。 PVOH支持极性油墨载体的共聚体扩散，这会打开聚合物基体，从而使着色剂可以转移到粘合剂网络中并保留在那里。另外，众所周知，在涂料和喷墨油墨之间提供相反的电荷可最有效地粘结着色剂。当应用于纸张时，特别是在涂料表面上使用阳离子添加剂，会降低涂料的渗透性，从而减慢油墨渗透到纸张结构中的速度，并通过电荷相互作用将阴离子着色剂结合在顶层，从而减少渗色并且可以提高耐水性。

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