Evaluation of Silica-Coated PCC as New Modified Filler for Papermaking

Evaluation of Silica-Coated PCC as New Modified Filler for Papermaking

Silica-coated precipitated calcium carbonate (PCC) prepared by a sol–gel method in a previous study, was used, for the first time, as filler for papermaking. Three samples of modified PCC, containing 11, 21, and 29 wt % of silica, were prepared. The handsheets produced with a eucalyptus kraft pulp f...

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Bibliographic Details
Published in:Industrial & engineering chemistry research Vol. 52; no. 14; pp. 5095 - 5099
Main Authors: Lourenço, Ana F, Gamelas, José A. F, Zscherneck, Christin, Ferreira, Paulo J
Format: Journal Article
Language:English
Published: American Chemical Society 10-04-2013
Subjects:
Bonding
Calcium carbonate
Crystals
Eucalyptus
Fillers
Papermaking
Silicon dioxide
Thin films
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Summary:Silica-coated precipitated calcium carbonate (PCC) prepared by a sol–gel method in a previous study, was used, for the first time, as filler for papermaking. Three samples of modified PCC, containing 11, 21, and 29 wt % of silica, were prepared. The handsheets produced with a eucalyptus kraft pulp furnish containing the new PCC-based materials showed better paper strength properties than those with the unmodified PCC, whereas the structural properties and brightness were not affected (for similar filler retention values (ca. 80%)). The results suggest that a thin film of silica coating the calcium carbonate crystals has a positive impact on the filler-to-fiber-to-filler bonding. This may open a new possibility to increase the filler amount in the papermaking industry.
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ISSN:0888-5885
1520-5045
DOI:10.1021/ie3035477