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Titolo:
Poly(propylene imine) dendrimers as retention aid for the deposition of calcium carbonate on pulp fibres
Autore:
Koper, GJM; Vanerek, A; Van de Ven, TGM;
Indirizzi:
Leiden Inst Chem, Fac Math & Nat Sci, NL-2300 RA Leiden, Netherlands Leiden Inst Chem Leiden Netherlands NL-2300 RA 00 RA Leiden, Netherlands 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: 3, volume: 25, anno: 1999,
pagine: 81 - 83
SICI:
0826-6220(199903)25:3<81:PIDARA>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
POLYETHYLENIMINE; KINETICS; FIBERS; SALT;
Keywords:
retention aids; calcium carbonate; polypropylene; imines; deposition; adsorption; kinetics; particles; size; bleached pulps; kraft pulps; bonding strength; polyethylenimine; electric charge;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
6
Recensione:
Indirizzi per estratti:
Indirizzo: Koper, GJM Leidenndsst Chem, Fac Math & Nat Sci, POB 9502, NL-2300 RA Leiden, Netherla Leiden Inst Chem POB 9502 Leiden Netherlands NL-2300 RA therla
Citazione:
G.J.M. Koper et al., "Poly(propylene imine) dendrimers as retention aid for the deposition of calcium carbonate on pulp fibres", J PULP PAP, 25(3), 1999, pp. 81-83

Abstract

The kinetics of deposition of calcium carbonate particles of about 2 mu m diameter has been studied with poly(propylene imine) dendrimers as retention agent. The adsorption process is shown to follow Langmuir kinetics. The measured kinetic parameters are of a similar magnitude to those found for poly(ethylene imine), as retention aid Since larger particles were used ii? this study the expected increase lit detachment rate was cancelled by a larger bond strength, caused by a higher charge density of the dendrimers. It is concluded that dendrimers are a somewhat better retention aid than poly(ethylene imine) for the retention of calcium carbonate.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 04:34:18