Study on alkali-accessible chromophores from unbleached kraft pulp

被引：4

作者：

Bikova, T ^{[1
]}

Klevinska, V ^{[1
]}

Eremeeva, T ^{[1
]}

Treimanis, A ^{[1
]}

机构：

[1] Latvian State Inst Wood Chem, LV-1006 Riga, Latvia

来源：

HOLZFORSCHUNG | 2001年 / 55卷 / 05期

关键词：

kraft pulp; alkaline extraction; SEC; chromophore composition; residual lignin;

D O I：

10.1515/HF.2001.089

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

An approach to a chromophore composition study using the direct size-exclusion chromatography (SEC-UV) analysis of an alkaline extract of pulp fibre walls is described. Absorbance in the 290-405 nm range of 2 % and 18 % NaOH extract from unbleached pulps obtained by conventional and extended kraft delignification of black alder wood is compared. The effect of cooking conditions on the localisation and accessibility of chromophores is elucidated. The alkali-soluble lignin from pulp produced by extended cooking was less oxidised, less conjugated, and less coloured as compared with the conventional kraft lignin. A chromophore accessibility index is proposed. The chromogenic structures in pulps obtained by extended cooking were more resistant to alkali solutions than those in conventional kraft pulps.

引用

页码：554 / 558

页数：5

共 23 条

[1]

Aliev R. G., 1990, Khimiya Drevesiny, P45

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