【作者】 王娜；

【导师】 魏先福； 黄蓓青；

【作者基本信息】 北京印刷学院 ， 材料物理与化学， 2009， 硕士

【摘要】 数字印刷技术代表着印刷技术的发展方向,喷墨数字印刷是当今数字印刷技术发展的主流之一。UV喷墨数字印刷成为当前喷墨数字印刷技术的研究热点,因其节能、环保、高效的特点引起广泛关注。UV喷墨油墨是UV喷墨数字印刷的重要材料。基于喷墨数字印刷设备及印刷品质量的要求,UV喷墨油墨在性能方面也有更高的要求。在UV喷墨油墨的研究中,分散性和流变性能是两个最重要的性能之一。研究UV喷墨油墨的分散性及流变性能对UV喷墨数字印刷的发展具有重要意义。本论文通过试验配方设计,优化了UV喷墨油墨的单体配方,制备了基于最优色浆配方以及最优油墨配方的UV喷墨油墨实验样品。在油墨制备过程中采用了球磨、砂磨和高压均质三种分散方法。采用目测法、显微镜图片观测与计算、粒径及粒度分布测试、紫外吸收光谱以及流变参数测试等方法评价了制备的UV喷墨油墨颜料粒子的分散性及其分散状态。采用高倍显微镜拍摄的油墨样品的显微图片,可以直观判断颜料粒子的分散状态,经统计计算,能够粗略估算粒度分布；激光粒度仪可以直接测试油墨样品的颜料粒径大小及其分布状态；通过测试不同分散条件下制备的油墨样品的紫外吸收光谱曲线,根据吸收峰的变化,能够判断颜料粒子的分散性能；利用流变仪测试油墨样品粘度值和动态粘弹性参数,并结合其它测试方法得到的数据,可以定性评价颜料粒子形成的凝聚结构的状态。研究结果表明合适的球磨分散时间可以获得更好的颜料分散状态；砂磨分散和高压均质分散可以得到颜料粒径小于0.35μm的UV喷墨样品,而且这两种分散方法对颜料粒子具有一定的粉碎作用；颜基比对颜料粒子的分散有较大的影响；紫外可见吸收光谱与油墨体系的分散性存在较强的依赖关系,随着颜料粒子粒径的减小,油墨体系的紫外吸收强度增大；油墨样品的粘度随着粒径的减小而增大。更多还原

【Abstract】 Digital printing technology represents the developing direction of printing technology and digital ink-jet printing is one of the mainstream developments of digital printing technology. UV-curable ink-jet ink with energy-saving, environmentally friendly and high efficiency has become the most concerned new ink and has a tremendous prospects for development. UV ink-jet ink is a very important material to digital UV ink-jet printing.Based on the demand of ink-jet printing equipment and print quality, the performance of UV ink-jet ink also should be higher. In the study of UV ink-jet ink, the dispersion and rheological behavior are two of the most important performance. The study of the dispersion and rheological behavior of the UV ink-jet ink is important to the development of digital UV ink-jet printing。In this paper, through the formulation experiment to optimize the UV inkjet ink formulation of the monomers, the samples based on the best formulation of UV inkjet ink are prepared. In the preparation of ink, milling dispersion, sanding dispersion and high-pressure homogenization are used. The dispersion of pigment particles and the dispersing state of the UV inkjet ink are evaluated by the methods which are observation by eyes, observation and calculation by microscope, the testing of the size and the distribution of the particles, the absorption spectrum and the testing of the rheological parameter.Using the high-power microscope to get the picture of the ink samples, the dispersing state of the particles can be judged visually and the distribution can be roughly estimated through statistical calculation; the particle size and distribution of the samples can be testing by laser particle apparatus; the dispersed performance of pigment particles can be judged according to the changing of the absorption peaks; the viscosity and dynamic viscoelasticity are tested by rheometer and the condensing structure can be qualitative evaluatedThe results show that the proper milling time can get a better dispersed state of pigment particles; sanding and high-pressure homogenization can get UV inkjet samples, the size of which are less than 0.35μm. Dispersion of the sanding and high-pressure homogenization has a crushing affect on the pigment particles; the ratio of pigment to pre-polymer has a greater impact on the dispersion of pigment particles; the absorption spectrum has a strong dependence with the dispersion of ink system. With the decreasing of the pigment particle size, the absorption intensity of the ink system increases; viscosity of the ink samples increases with the decreasing of the size.更多还原