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Titolo:
The flocculation mechanism of microparticulate retention aid systems
Autore:
Asselman, T; Garnier, G;
Indirizzi:
McGill Univ, Dept Chem Engn, Montreal, PQ H3A 2A7, Canada McGill Univ Montreal PQ Canada H3A 2A7 Engn, Montreal, PQ H3A 2A7, Canada McGill Univ, PAPRICAN, Montreal, PQ H3A 2A7, Canada McGill Univ Montreal PQ Canada H3A 2A7 ICAN, Montreal, PQ H3A 2A7, Canada
Titolo Testata:
JOURNAL OF PULP AND PAPER SCIENCE
fascicolo: 8, volume: 27, anno: 2001,
pagine: 273 - 278
SICI:
0826-6220(200108)27:8<273:TFMOMR>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
EFFICIENCY FACTORS; ADSORPTION; FIBERS; MODEL;
Keywords:
kinetics; retention aids; fines; deposition; bentonite; cationic compounds; acrylamide; polyacrylics; flocculation; reaction mechanism;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Asselman, T McGill Univ, Dept Chem Engn, 3420 Univ St, Montreal, PQ H3A 2A7, Canada McGill Univ 3420 Univ St Montreal PQ Canada H3A 2A7 A7, Canada
Citazione:
T. Asselman e G. Garnier, "The flocculation mechanism of microparticulate retention aid systems", J PULP PAP, 27(8), 2001, pp. 273-278

Abstract

We have investigated the kinetics of fines deposition on pulp fibres with a cationic poly(acrylamide) (CPAM)/bentonite (montmorillonite) retention aid. Different CPAM/montmorillonite bridging configurations between fibres and fines were studied and compared with single polymer layers. The results show that montinorillonite platelets increase the bond strength of adsorbed polymer layers on fibres and fines, and reduce the polymer transfer betweensurfaces. Moreover, montinorillonite platelets are effective bridging agents between "inactive" polymer layers. The mechanism of these flocculants isexplained in terms of surface charge densities and polymer layer-conformations. These results provide indications for the optimization of these systems in mill conditions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/09/20 alle ore 10:10:27