The aggregation of branched polyethylenimine and cationic surfactants in aqueous systems

被引：16
|
作者：
Kosacheva, E. M.
Kudryavtsev, D. B.
Bakeeva, R. F.
Kuklin, A. I.
Islamov, A. Kh.
Kudryavtseva, L. A.
Sopin, V. F.
Konovalov, A. I.
机构：
[1] Russian Acad Sci, AE Arbuzov Organ & Phys Chem Inst, Kazan Res Ctr, Kazan 420088, Tatarstan, Russia
[2] Kazan State Technol Univ, Kazan 420014, Tatarstan, Russia
[3] Joint Inst Nucl Res, Dubna 141980, Russia
来源：
COLLOID JOURNAL | 2006年 / 68卷 / 06期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1134/S1061933X0606007X
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：
The aggregation of binary mixtures of branched polyethylenimine with a molecular mass of 30 000 and cationic surfactants, such as cetyltrimethylammonium bromide, cetyldimethylethylammonium bromide, or cetyldimethyl(2-hydroxyethyl)ammonium bromide, in aqueous solutions is studied. The critical micellization concentrations, as well as the sizes and shapes of aggregates, are determined by conductometry, small-angle neutron scattering, and dynamic light scattering methods. Catalytic activity of cationic surfactant-polyethylenimine compositions in the hydrolysis of tetracoordinated phosphorus acid 4-nitrophenyl esters is studied via spectrophotometry. The influence of spatial characteristics of aggregates on the catalytic activity and selectivity of nanostructured polymeric systems is revealed.
引用
收藏
页码：713 / 720
页数：8
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