Microstructural characterization of micro- and nanoparticles formed by polymer-surfactant interactions

被引：90

作者：

Nizri, G

Magdassi, S

Schmidt, J

Cohen, Y

Talmon, Y ^{[1
]}

机构：

[1] Technion Israel Inst Technol, Dept Chem Engn, IL-32000 Haifa, Israel

[2] Hebrew Univ Jerusalem, Casali Inst Appl Chem, IL-91904 Jerusalem, Israel

来源：

LANGMUIR | 2004年 / 20卷 / 11期

关键词：

D O I：

10.1021/la0364441

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We have studied the nano- and microparticles formed by complexation of PDAC [poly(diallyldimethyl-ammoniumchloride)] and SDS (sodium dodecyl sulfate). The complexation phenomenon was characterized by light scattering and zeta-potential measurements. The nature of the complexes was revealed by direct-imaging cryogenic temperature transmission electron microscopy (cryo-TEM), showing nanometric details of the complexes formed around the point of neutralization. The images also reveal how those aggregates are solubilized by excess surfactant, first into faceted particles with threadlike micelles attached to their surfaces, prior to complete solubilization, then into lacelike aggregates, and finally into spheroidal micelles. The nanostructure of the complexes strongly suggests they are made of a hexagonal liquid crystalline phase. This was further supported by small-angle X-ray scattering (SAXS).

引用

页码：4380 / 4385

页数：6

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