Surface-sensitive method to determine calcium carbonate filler contents in cellulose matrices

Hilder, Matthias and Batchelor, Warren 2010, Surface-sensitive method to determine calcium carbonate filler contents in cellulose matrices, Cellulose, vol. 17, no. 2, pp. 407-415, doi: 10.1007/s10570-009-9316-y.

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Title Surface-sensitive method to determine calcium carbonate filler contents in cellulose matrices
Author(s) Hilder, Matthias
Batchelor, Warren
Journal name Cellulose
Volume number 17
Issue number 2
Start page 407
End page 415
Total pages 9
Publisher Springer-Verlag
Place of publication Berlin, Germany
Publication date 2010
ISSN 1572-882X
Keyword(s) attentuated total reflection
scanning electron microscope
calcium carbonate
Summary This paper describes a method using attenuated total reflectance infra-red spectroscopy to determine the surface concentration of calcium carbonate in paper samples, by applying the linear relationship between the relative infra-red absorption integrals and the concentration. The method was able to detect micro-variations in the surface concentration and could also distinguish between different sheets as well as between the top and bottom side of one sheet. The samples were also split and the calcium carbonate concentration was determined within and compared to bulk calcium carbonate concentration determined from ash testing. The surface results were also compared with analysed scanning electron microscopy images generated from back-scattering electrons. The comparison shows that both sets of results are in excellent agreement. Depending on the sample, large errors (95% confidence) were observed. These, however, are caused by micro-variations of the surface concentration, rather than by inaccuracies of the technique, which is estimated to be less than 1%. Furthermore, measurements of various sample orientations suggest that anisotropic polarisation effects can be neglected. The method can be applied to paper and cellulose matrices having calcium carbonate filler contents of less than 50%. Due to spectral overlaps it is not suitable to determine kaolin filler contents.
Language eng
DOI 10.1007/s10570-009-9316-y
Field of Research 039999 Chemical Sciences not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2010, Springer
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