RT Journal Article
T1 Interaction of dissolved and colloidal material during the mixing of different pulps
A1 Monte Lara, María Concepción
A1 MacNeil, Donald
A1 Negro Álvarez, Carlos Manuel
A1 Blanco Suárez, Ángeles
AB Mixtures of stickies-containing and stickies-free pulps were investigated for their deposition potntial in an attempt to better understand the interactions of dissolved and colloidal material (DCM) when mixing two different pulps. The filtered pulp mixtures were tested in a deposition apparatus which measures both the dynamic fluid as well as impact deposition by an established optical scanning method. A pulp filtrate of model stickies led to deposition according to the proportion of stickies-containing pulp in the mixture. Other mixtures of pulps, however, led to deposition that differed from the predicted value. It is theorised that pulp fibres present in the mixture could adsorb the polysaccharides that would otherwise keep the colloidal system electrostatically stable. This destabilisation was most prominent at lower proportions of the stickies-free pulp suspensions used for mixing. These results show that care must be taken when mixing different pulps for paper and board production, as even a small amount of replacement pulp can lead to destabilisation of DCM and formation of deposits. Furthermore, special care must be taken when mixtures of pulps are used to validate stickies measurements.
PB Walter de Gruyter
SN 0018-3830 (print), 1437-434X (Online)
YR 2010
FD 2010
LK https://hdl.handle.net/20.500.14352/41858
UL https://hdl.handle.net/20.500.14352/41858
LA eng
NO Unión Europea. FP7
NO Comunidad de Madrid
NO Ministerio de Ciencia e Innovación
DS Docta Complutense
RD 2 may 2024