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Titolo:
Residual lignin distribution in bleached kraft pulp fibres
Autore:
Wang, HH; Hunt, K; Wearing, JT;
Indirizzi:
PAPRICAN, Vancouver Lab, Vancouver, BC V6S 2L9, Canada PAPRICAN VancouverBC Canada V6S 2L9 r Lab, Vancouver, BC V6S 2L9, Canada
Titolo Testata:
JOURNAL OF PULP AND PAPER SCIENCE
fascicolo: 2, volume: 26, anno: 2000,
pagine: 76 - 81
SICI:
0826-6220(200002)26:2<76:RLDIBK>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
SEM-EDXA-TECHNIQUE; SPRUCE PICEA-ABIES; MORPHOLOGICAL PARTS; SECONDARY WALL; WOOD; MERCURIZATION; LIGNIFICATION; PEROXIDE;
Keywords:
kraft pulps; bleached pulps; lignins; cell walls; distribution; microscopy; chlorine free beaching;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
51
Recensione:
Indirizzi per estratti:
Indirizzo: Wang, HH Natl Pingtung Univ Sci & Technol, Dept Wood Chem, 1 Hseuh Fu Rd, Nei Pu Hsiang, Pintang, Taiwan Natl Pingtung Univ Sci & Technol 1 Hseuh Fu Rd Nei Pu Hsiang Pintang Taiwan
Citazione:
H.H. Wang et al., "Residual lignin distribution in bleached kraft pulp fibres", J PULP PAP, 26(2), 2000, pp. 76-81

Abstract

The distribution of residual lignin across the cell wall of kraft pulp fibres was measured after a variety of single bleaching stages. Measurements of brominated fibre sections were taken using scanning transmission electronmicroscopy with energy dispersive X-ray analysis (STEM-EDXA). The powerfuloxidants ozone and isolated dimethyldioxirane,] reacted more rapidly with outer cell wall material [(P+S-1) and S-3 layers], while reaction with lignin in the interior wall (S-2) appeared to be slowed by mass transfer limitations. Peroxide, monoperoxysulphate, chlorine dioxide, and in-situ-generated dimethyldioxirane produced uniform residual lignin distributions Following oxygen bleaching, the residual lignin in the (P+S-1) and S-3 layers were higher than in the S-2 layer; with a ratio very close to that of the original kraft pulp.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 04:25:08