A1 Journal article (refereed), original research

Effect of PCC crystallization and morphology on flocculation with microfibrillated cellulose, on sheet densification and liquid absorption behavior


Open Access hybrid publication

Publication Details
Authors: Laukala Teija, Lyytikäinen Johanna, Mielonen Katriina, Backfolk Kaj
Publisher: Springer Verlag (Germany)
Publication year: 2020
Language: English
Related Journal or Series Information: Cellulose
ISSN: 0969-0239
JUFO-Level of this publication: 2
Open Access: Open Access hybrid publication

Abstract

Composite sheets consisting of elongated and aggregated cationically
charged precipitated calcium carbonate (PCC) and native microfibrillated
cellulose (MFC) were prepared with a wet laying method. The furnishes
were prepared with and without an anionic flocculating agent
(polyacrylamide) in order to adjust the structure of the sheet. The
samples were compressed (densified) in order to determine the particle
and microfibrillated cellulose-PCC structure coalescence and
densification, as well as its subsequent influence on liquid absorption
behavior. The densification affected both the vertical and lateral
distribution of PCC, but the flocculating agent enhanced the compression
stability and stabilized the sheets against PCC material flow. The
differences between the sheets made with and without the flocculation
aid affected the absorption of an anionic dye-based fluid ink, which was
evident as a higher print density and less print bleeding. The
absorption behavior was dependent on the sheet structure, especially on
the PCC distribution within the sheets. Finally, the role of MFC on floc
structure and floc formation is discussed.


Last updated on 2020-30-11 at 10:45