喷墨油墨连接料水性聚氨酯的改性研究进展

Research progress in modification of waterborne polyurethane for inkjet ink binders

摘要:

水性油墨是目前最具发展潜力的环保型油墨，其最重要的成分是水性树脂连接料。水性树脂连接料很大程度上决定了水性油墨性能的优劣。近年来，水性聚氨酯（WPU）作为喷墨打印的油墨连接料受到了广泛关注，作为一种水分散型环保材料，WPU具有低VOCs含量、安全不易燃、结构可设计性强等优点，但WPU在耐水性、耐溶剂性、粘附力、稳定性、力学性能和机械性能上欠佳，因此需要进行改性以满足其作为喷墨油墨连接料的应用需求。本文首先简述了喷墨打印方式和WPU性能的影响因素，然后重点综述WPU改性方法的研究进展，主要对二醇/二胺扩链改性、有机氟/有机硅改性、丙烯酸酯改性、环氧树脂改性、纳米材料改性、生物质材料改性、超支化改性、点击化学改性和封端改性等九个改性方法的技术特点、优势和不足、WPU性能提升和适用范围进行论述；最后从复合改性、生物质原料、功能化和低固高黏四方面对WPU喷墨油墨连接料未来的发展趋势进行了展望。

Abstract:

Water-based ink is currently the most development potential of environmentally friendly ink, its most important component is water-based resin linker. In recent years, there has been a growing interest in utilizing waterborne polyurethane (WPU) as ink binders for inkjet printing, as a water-dispersed environmentally friendly material, WPU has the advantages of low VOCs content, safety and non-flammability, and strong structural designability, etc. However, WPU is poor in water resistance, solvent resistance, adhesion, stability, and mechanical properties, making it necessary to explore modification approaches to meet evolving application demands as an inkjet ink. This paper firstly briefly describes the influencing factors of inkjet printing methods and WPU performance, and then focuses on the research progress of WPU modification methods, mainly on the technical characteristics, advantages and shortcomings of nine modification methods, such as diol/diamine chain expansion modification, organofluorine/silicone modification, acrylate modification, epoxy modification, nano-materials modification, biomass material modification, hyperbranched modification, click chemistry modification, and end-capping modification, as well as the enhancement and improvement of WPU performance. Finally, from the composite modification, biomass raw materials, functionalization and low solid and high viscosity four aspects of the future development trend of WPU inkjet ink connecting material prospects.