Li Na, Li Lulu, Sun Chenghua, Fixler Dror, Xiao Shizhuo, Zhou Shuyun
Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Molecules. 2025 Feb 20;30(5):975. doi: 10.3390/molecules30050975.
High-performance water-based inkjet inks are critical for advancing inkjet printing technology. The performance of water-based inkjet inks depends largely on the dispersion stability of organic pigments. This imposes higher demands on the performance of polymeric dispersants. However, the relatively weak interaction between polymeric dispersants and organic pigments limits their performance in water-based inkjet inks. Consequently, it is crucial to seek dispersants that exhibit stronger interactions with pigments, alongside high performance, and universality. In this work, five types of polymeric nanoparticles (PNPs) with anion-π groups were synthesized via a simple emulsion polymerization method. Compared to traditional polymeric dispersants, anion-π type PNPs exhibited significant advantages including low viscosity, solvent resistance, and high temperature resistance. Stronger interactions, including salt-bridge hydrogen bondings (H-bonds) and π-π interactions, between these PNPs and different types of organic pigments were demonstrated by FTIR, UV-Vis, and XPS spectral tests. In particular, PNPs-5, bearing -PhSO groups, exhibited the strongest interaction with the organic pigments. The water-based inkjet inks, formulated with PNPs-5 serving as a dispersant, exhibited remarkable dispersion stability and outstanding weatherability. This work rationally constructs a strategy for preparing universally applicable polymeric dispersants to enhance the dispersion of pigments in water-based inkjet inks, thereby presenting a broader perspective for applications in the field of inkjet printing.
高性能水性喷墨油墨对于推进喷墨印刷技术至关重要。水性喷墨油墨的性能在很大程度上取决于有机颜料的分散稳定性。这对聚合物分散剂的性能提出了更高的要求。然而，聚合物分散剂与有机颜料之间相对较弱的相互作用限制了它们在水性喷墨油墨中的性能。因此，寻找与颜料具有更强相互作用、同时具备高性能和通用性的分散剂至关重要。在这项工作中，通过简单的乳液聚合法合成了五种带有阴离子-π基团的聚合物纳米颗粒（PNPs）。与传统聚合物分散剂相比，阴离子-π型PNPs表现出显著优势，包括低粘度、耐溶剂性和耐高温性。通过傅里叶变换红外光谱（FTIR）、紫外-可见光谱（UV-Vis）和X射线光电子能谱（XPS）测试证明了这些PNPs与不同类型有机颜料之间存在更强的相互作用，包括盐桥氢键和π-π相互作用。特别是带有-PhSO基团的PNPs-5与有机颜料表现出最强的相互作用。以PNPs-5作为分散剂配制的水性喷墨油墨表现出显著的分散稳定性和出色的耐候性。这项工作合理构建了一种制备通用型聚合物分散剂的策略，以增强颜料在水性喷墨油墨中的分散性，从而为喷墨印刷领域的应用提供了更广阔的前景。
