A comparative study of the effect of refining on physical and electrokinetic properties of various cellulosic fibres

被引:52
作者
Bhardwaj, Nishi K. [1 ]
Hoang, Viet [1 ]
Nguyen, Kien L. [1 ]
机构
[1] Monash Univ, Dept Chem Engn, Australian Pulp & Paper Inst, Clayton, Vic 3800, Australia
关键词
surface charge; carboxyl groups; refining; beating; kraft pulps; FTIR;
D O I
10.1016/j.biortech.2006.05.040
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
The aim of this work was to study the influence of refining on various pulp properties such as freeness, specific surface area, specific volume, surface charge, total charge and elastic modulus. The results indicated that specific surface area of the pulps increased with increased refining, and at the same freeness level the pine pulp exhibited higher surface charge, surface area, and specific volume than the eucalyptus pulps. Also, the eucalypt pulps were much easier to beat than the pine pulps. The total fibre charge, as determined by conductometric titrations, was not affected by refining. However, the surface charge, as determined by titrations with poly-DADMAC, increased with refining. Increasing the specific surface area by refining resulted in a higher fibre surface charge and better fibre fibre bonding. The change of the fibre surface charge during refining could be monitored using the FTIR characteristic bands within 1700-1300 cm(-1). (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1647 / 1654
页数:8
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