论文部分内容阅读
为了确定纳米原纤化纤维素(nanofibrillated cellulose,NFC)用作涂料的潜力,该文对涂布NFC的合成纤维纸的性能进行了研究。试验中用2种水性油墨印刷方式表征印刷质量的变化,并用2种不同的方法制备了2种不同类型的NFC。试验中同时用油墨吸收速率和墨层密度评价了不同NFC涂布量样品的印刷性能。用激光共聚焦扫描显微镜和扫描电镜观察油墨中颜料粒子的渗透,并用聚焦离子束技术对样品进行化学分析。结果表明,接触角和油墨渗透速率随NFC涂布量的增加而减小;这一结果与用Lucas-Washburn方程推断的结果相反;柔性版印刷所用颜料型油墨中的颜料粒子会被NFC截留在印刷品表面,而对于染料型油墨,其组成成分会渗透穿过NFC涂层;NFC涂层可以改善喷墨印刷品的印刷质量。
In order to determine the potential of nanofibrillated cellulose (NFC) as a coating, the properties of NFC coated synthetic fiber papers were investigated. Two types of aqueous inks were used to characterize the changes in print quality and two different types of NFC were prepared using two different methods. The printing performance of samples with different amounts of NFC coating was evaluated using both ink absorption rate and ink density at the same time. The penetration of pigment particles in the ink was observed with a laser scanning confocal microscope and a scanning electron microscope, and the samples were chemically analyzed by focused ion beam technique. The results showed that the contact angle and ink permeation rate decreased with increasing NFC coating volume; this result was in contrast to the inferred result of the Lucas-Washburn equation; the pigment particles in the pigment-based inks for flexographic printing were trapped by NFC Print surface, while dye-based inks, the composition will permeate through the NFC coating; NFC coating can improve the quality of the inkjet print.