The flocculation of fines by PEO/cofactor retention aid systems

被引：0
|
作者：
Carignan, A [1 ]
Garnier, G [1 ]
Van de Ven, TGM [1 ]
机构：
[1] McGill Univ, Pulp & Paper Res Inst Canada, Dept Chem Engn & Chem, PAPRICAN, Montreal, PQ H3A 2A7, Canada
来源：
JOURNAL OF PULP AND PAPER SCIENCE | 1998年 / 24卷 / 03期
关键词：
thermomechanical pulps; fines; flocculation; polyethylene oxide; retention aids; polymers; cross linking;
D O I：
暂无
中图分类号：
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号：
0805 ; 080502 ; 0822 ;
摘要：
The effects of various cofactors on the flocculation of TMP fines by polyethyleneoxide (PEO) were studied with a photometric dispersion analyzer. In addition, the sizes of freely dissolved and adsorbed PEO/cofactor complexes were determined by dynamic light scattering. Extended polymer configurations correlated well with optimum flocculation conditions, providing evidence for polymer bridging. The results suggest that, without cofactors, PEO adsorbs on some fines but not on others, leading to asymmetric polymer bridging. With cofactors, PEO/cofactor complexes adsorb on all fins and the cofactor apparently helps to increase the strength of the PEO bridge between fines.
引用
收藏
页码：94 / 99
页数：6
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