Effect of intermittent heat treatment on crystallinity in wood cellulose

被引：55

作者：

Bhuiyan, MTR ^{[1
]}

Hirai, N ^{[1
]}

Sobue, N ^{[1
]}

机构：

[1] Shizuoka Univ, Fac Agr, Shizuoka 4228529, Japan

来源：

JOURNAL OF WOOD SCIENCE | 2001年 / 47卷 / 05期

关键词：

wood cellulose; intermittent heat treatment; crystallinity; piezoelectricity;

D O I：

10.1007/BF00766782

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

The effect of intermittent heat treatment on cellulose crystallites in wood was studied to evaluate quantitatively the changes of crystallinity induced by intermittent and continuous heating. The changes in crystallinity were found to be strongly affected by the intermittent heat treatment. The increased crystallinity, the width of the crystals, and the piezoelectric properties were the same for the first intermittent heating as for continuous heating. Further intermittent heating for the same time duration and temperature had no effect on the above properties, probably due to the stopping of the thermal reaction during the interval. Our results suggested that intermittent heat treatment has certain critical cooling temperatures that stop the thermal reaction and are closely related to the duration of the interval. Samples once exposed to a certain duration of heat treatment and then cooled need more time, about twice that of the first duration of intermittent heating compared with continuous heating, to reach maximum crystallinity in wood cellulose.

引用

页码：336 / 341

页数：6

共 9 条

[1] Changes of crystallinity in wood cellulose by heat treatment under dried and moist conditions [J].