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Titolo:
Scanning probe microscopy of pine and birch kraft pulp fibres
Autore:
Simola, J; Malkavaara, P; Alen, R; Peltonen, J;
Indirizzi:
Abo Akad Univ, Dept Phys Chem, FIN-20500 Turku, Finland Abo Akad Univ Turku Finland FIN-20500 hys Chem, FIN-20500 Turku, Finland Univ Jyvaskyla, Lab Appl Chem, FIN-40351 Jyvaskyla, Finland Univ Jyvaskyla Jyvaskyla Finland FIN-40351 FIN-40351 Jyvaskyla, Finland
Titolo Testata:
POLYMER
fascicolo: 6, volume: 41, anno: 2000,
pagine: 2121 - 2126
SICI:
0032-3861(200003)41:6<2121:SPMOPA>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
ATOMIC-FORCE MICROSCOPY; PHASE-CONTRAST; IMAGES; MORPHOLOGY; LIGNIN; HEIGHT;
Keywords:
SPM; phase imaging; kraft pulp fibres;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Peltonen, J Abo Akad Univ, Dept Phys Chem, Porthansgatan 3-5, FIN-20500 Turku, Finland Abo Akad Univ Porthansgatan 3-5 Turku Finland FIN-20500 nland
Citazione:
J. Simola et al., "Scanning probe microscopy of pine and birch kraft pulp fibres", POLYMER, 41(6), 2000, pp. 2121-2126

Abstract

Fibres of the conventional pine and birch kraft pulps were characterized by scanning probe microscopy (SPM). The surface characteristics of these pulps taken at the early stages of pulping were compared with those from laterstages of pulping (with or without subsequent oxygen/alkali delignification). It was observed that during delignification a granular surface structure was replaced by a fibrillar surface containing various disruptions. The granular and fibrillar regions were particularly well resolved by using phase imaging in tapping mode of SPM. It was concluded that the granular structure corresponded to surface lignin since the decrease in the relative amount of the granular phase correlated well to a decreasing kappa value of pulps. The surface concentration of lignin, e.g. at the end of pulping was muchhigher than the bulk lignin concentration. Eventually individual microfibrils (estimated diameter ranging from 0.01 to 0.03 mu m) were observed for both pulps in the cases where delignification was almost completed. (C) 1999Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/04/20 alle ore 12:47:54