Flocculation Efficiency of Novel Amphiphilic Starch Derivatives: A Comparative Study

被引：8
作者：
Bratskaya, Svetlana Y. [2 ]
Genest, Sabine [1 ,4 ]
Petzold-Welcke, Katrin [3 ]
Heinze, Thomas [3 ]
Schwarz, Simona [1 ]
机构：
[1] Leibniz Inst Polymerforsch Dresden eV, D-01069 Dresden, Germany
[2] Russian Acad Sci, Inst Chem, Far East Branch, Vladivostok 690022, Russia
[3] Univ Jena, Inst Organ Chem & Macromol Chem, Ctr Excellence Polysaccharide Res, D-07743 Jena, Germany
[4] Tech Univ Dresden, D-01062 Dresden, Germany
来源：
MACROMOLECULAR MATERIALS AND ENGINEERING | 2014年 / 299卷 / 06期
关键词：
adsorption; amphiphilic starches; flocculation; fillers; surface coverage; PRECIPITATED CALCIUM-CARBONATE; CATIONIC POLYELECTROLYTES; ADSORPTION; FUNCTIONALIZATION; POLYACRYLAMIDE; POLYMERS; STRENGTH; SURFACES; CLAY; PCC;
D O I：
10.1002/mame.201300277
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Flocculation properties of amphiphilic starch derivatives of varying degrees of substitution (DS) of benzyl-and 2-hydroxypropyl-trimethylammonium moieties have been investigated in dispersions of kaolin, calcium carbonate, and silica. Moderate hydrophobic substitution leads to a decrease of efficient flocculant dose and increase of flocculation window width. Samples with high DS of hydrophobic moieties are effective only at significantly higher doses but in a broader concentration range compared to solely cationic ones of the same DS. Joint analysis of adsorption isotherms and flocculation test data has revealed that the surface coverage required to induce phase separation ranges between 10-25% and is minimal for amphiphiles, whose floc sizes are moreover less dependent on the flocculant dose.
引用
收藏
页码：722 / 728
页数：7
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