Analysis of precipitated lignin on kraft pulp fibers using atomic force microscopy |
| |
| Authors: | Franz J Schmied Christian Teichert Lisbeth Kappel Ulrich Hirn Robert Schennach |
| |
| Institution: | 1.Institute of Physics,Montanuniversit?t Leoben,Leoben,Austria;2.Institute for Paper, Pulp and Fiber Technology,Graz University of Technology,Graz,Austria;3.Institute of Solid State Physics,Graz University of Technology,Graz,Austria;4.CD-Laboratory for Surface Chemical and Physical Fundamentals of Paper Strength,Graz University of Technology,Graz,Austria |
| |
| Abstract: | A method is presented which enables analysis of lignin precipitated on the surface of kraft pulp fibers. As experimental input,
high-resolution atomic force microscopy phase images of the fiber surfaces have been recorded in tapping mode. A digital image
analysis procedure—based on the watershed algorithm—is applied to distinguish between cellulose fibrils and the precipitated
lignin. In this way, size distributions for the diameter of lignin precipitates on pulp fiber surfaces can be obtained. In
an initial application of the method, three softwood kraft pulps were analyzed: a black liquor cook with a very high content
of precipitated lignin, a bleached pulp where nearly no precipitated lignin is visible and an unbleached industrial pulp.
The proposed method is suggested as an appropriate tool to investigate the kinetics of lignin precipitation and the structure
of lignin precipitates in pulping and bleaching. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
