Grafting polyelectrolytes onto polyacrylamide for flocculation - 2. Model suspension flocculation and sludge dewatering

被引：32

作者：

Ma, M ^{[1
]}

Zhu, S ^{[1
]}

机构：

[1] McMaster Univ, Dept Chem Engn, Hamilton, ON L8S 4L7, Canada

来源：

COLLOID AND POLYMER SCIENCE | 1999年 / 277卷 / 2-3期

关键词：

flocculation; dewatering; titanium dioxide; sludge; particle size;

D O I：

10.1007/s003960050376

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Low-molecular-weight high-charge-density cationic poly(diallyldimethylammoniurn chloride) (polyDADMAC) was grafted onto high-molecular-weight nonionic polyacrylamide (PAM) via a free radical mechanism using a gamma radiation technique. The graft copolymers having various charge densities were evaluated as flocculants for titanium dioxide (TiO2) model suspensions, and as conditioners for a pulp and paper mill sludge. Their flocculation performance was optimized with respect to polymer composition, gamma irradiation time and polymer dosage. Measurements included turbidity, particle size distribution and drainage rates. The graft copolymers showed a significant improvement over the homopolymers and dual polymer systems in their flocculation and sludge dewatering performance.

引用

页码：123 / 129

页数：7

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