DataVXLangmuirPaper
journal article·2020-05-05

Structural Study of Polystyrene-b-poly(acrylic acid) Micelles Complexed with Uranyl: A SAXS Core–Shell Model Analysis

Qiang Tian, Di Zhang, Na Li, Mark Julian Henderson, Qintang Li, Guy Royal, Jérémie Courtois, Minhao Yan, Zhichao Zhu, László Almásy

Langmuir· Volume 36· Issue 17
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Source abstract

Abstract

The interactions between natural colloidal organic matter and actinides in solutions are complex and not fully understood. In this work, a crew-cut polystyrene-b-poly(acry1ic acid) (PS-b-PAA) micelle is proposed as a model particle for humic acid (HA) colloid with the aim to better understand the sequestration, aggregation, and mobility of HA colloids in the presence of uranyl ions. The effects of uranyl ions on the structure of PS29k-b-PAA5k micelles in aqueous solution were mainly investigated by synchrotron small-angle X-ray scattering. A core–shell model, accounting for the thickness and contrast changes of the PAA corona induced by the adsorption of uranyl, was employed to analyze the scattering data. A combination of transmission electron microscopy, dynamic light scattering, and zetametry showed a strong affinity of uranyl ions to PAA segments in water at pH 4–5 that resulted in the shrinkage and improved contrast of the PAA corona, as well as colloidal destabilization at a high uranyl concentration.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Radioactive element chemistry and processing · Lanthanide and Transition Metal Complexes · Chemical Synthesis and Characterization

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Environment-Friendly Energy Materials, School of Materials Science and Technology, Southwest University of Science and Technology, Mianyang 621010, China

National Facility for Protein Science in Shanghai, Zhangjiang Laboratory, No. 233 Haike Road, Shanghai 201204, China

CNRS, DCM, University Grenoble Alpes, 38000 Grenoble, France

Key Laboratory of Neutron Physics and Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621999, China

Institute for Energy Security and Environmental Safety, Centre for Energy Research, P.O. Box 49, H-1525 Budapest, Hungary

Funding

National Natural Science Foundation of China · Southwest University of Science and Technology

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