Confocal Raman AFM
A Study of Paper Production and Finishing
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A better understanding of the micro- and nanostructures of cellulose fiber composition before and after various chemical treatments together with the distribution of bleaching additives to the final paper composition is essential for further improvements of paper properties. Confocal Raman imaging is a valuable tool for such studies, as it not only reveals optical information but also information regarding the 3D distribution of the chemical compounds in the sub-micrometer range [1-3]. In the paper surface finishing process additional surface roughness parameters can be measured by combining Confocal Raman Microscopy with Atomic Force Microscopy (AFM). Such combined analytical microscopes allow a direct linking between high resolution imaging and chemical identification of various species on a surface [4-5]. The aim of this contribution is to present examples of confocal Raman and AFM measurements from various stages of the paper manufacturing process.