应用显微技术观察未涂布纸中墨滴渗透图像的研究

摘译 墨滴在纸页结构中的渗吸是一个非常复杂的过程.纸页中的孔隙以纳米级尺寸存在于纤维(纤维之间或几微米的大孔径)及其细胞壁中.墨滴的渗吸过程包括纤维间孔隙的毛细管作用、在纤维内部和细胞壁微孔中的渗透,以及沿纤维的表面扩散.喷墨墨滴大小只达到皮升级,因此纤维的芯吸效应和墨水在纤维表面的扩散起主要作用.

Imaging of Ink Jet Penetration in Uncoated Paper Using Microscopic Techniques

Ink penetration in paper is influenced by the structure of the interfiber and intrafiber void spaces and the surface characteristics of the fibers.This report describes new techniques to determine the influence of the fiber surfaces and the cell wall internal structure on ink spreading and penetration.The location and penetration of ink is demonstrated by optical,scanning electron,confocal laser scanning,and transmission electron microscopy(TEM)methods.Ink penetration,as determined by each of these methods,is compared.The hemicellulose of the fiber’s internal void surfaces can be determined by immunochemical labeling in conjunction with TEM imaging.We demonstrate this by using primary monoclonal antibodies with specificity for hemicellulose with a secondary colloidal gold marker.This technique provides a way to visualize the location of hemicelluloses inside the cell wall and on the surfaces of nanopores.Combining paper structure with fluid spreading and wicking models can identify the influence of fiber surfaces and the cell wall on drop absorption.