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Titolo:
Improvement of fiberboard made from acetylated fibers by ozonation I: effect of ozonation on mechanical properties
Autore:
Korai, H; Kiguchi, M; Hosoya, S; Suzuki, S; Hirano, Y; Iwata, R;
Indirizzi:
Forestry & Forest Prod Res Inst, Wood Chem Div, Tsukuba, Ibaraki 3058687, Japan Forestry & Forest Prod Res Inst Tsukuba Ibaraki Japan 3058687 8687, Japan Yamaha Corp, Prod Engn Div, Hamamatsu, Shizuoka 4358567, Japan Yamaha Corp Hamamatsu Shizuoka Japan 4358567 tsu, Shizuoka 4358567, Japan
Titolo Testata:
JOURNAL OF WOOD SCIENCE
fascicolo: 1, volume: 47, anno: 2001,
pagine: 24 - 29
SICI:
1435-0211(2001)47:1<24:IOFMFA>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
DIMENSIONAL STABILITY; PARTICLEBOARD;
Keywords:
fiberboard; ozone; acetylation; wettability; thermoplasticity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Korai, H Forestry & Forest Prod Res Inst, Wood Chem Div, Tsukuba, Ibaraki 3058687, Japan Forestry & Forest Prod Res Inst Tsukuba Ibaraki Japan 3058687 an
Citazione:
H. Korai et al., "Improvement of fiberboard made from acetylated fibers by ozonation I: effect of ozonation on mechanical properties", J WOOD SCI, 47(1), 2001, pp. 24-29

Abstract

Acetylated fibers with a 24.8% weight gain by acetylation were ozonated with 0%-2.0% ozone on fibers. Fiberboards were then made from these treated fibers. The internal bond and bending strength of the acetylated fiberboardsincreased drastically with increasing ozone charge up to 0.5%-1.0%, whereas the thickness swelling of the fiberboards decreased. Ozone selectively cleaves the aromatic rings of hydrophobic lignin and introduces a hydrophiliccarboxyl group into lignin. Thus, the wettability and thermoplasticity of acetylated fibers increased, and this structural modification improved the interfiber contact. Internal bond and bending strength increased as a result. In addition, steep density profiles were formed by the ozonation, resulting in high bending strength. The high compaction ratio accelerated the effect of ozonation. The optimum ozone charges for improving mechanical properties were 0.5%-1.0%.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/06/20 alle ore 23:54:31