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Structural Study of Polystyrene-b-poly(acrylic acid) Micelles Complexed with Uranyl: A SAXS Core-Shell Model Analysis.
Tian, Qiang; Zhang, Di; Li, Na; Henderson, Mark Julian; Li, Qintang; Royal, Guy; Courtois, Jérémie; Yan, Minhao; Zhu, Zhichao; Almásy, László.
Affiliation
  • Tian Q; State Key Laboratory of Environment-Friendly Energy Materials, School of Materials Science and Technology, Southwest University of Science and Technology, Mianyang 621010, China.
  • Zhang D; State Key Laboratory of Environment-Friendly Energy Materials, School of Materials Science and Technology, Southwest University of Science and Technology, Mianyang 621010, China.
  • Li N; National Facility for Protein Science in Shanghai, Zhangjiang Laboratory, No. 233 Haike Road, Shanghai 201204, China.
  • Henderson MJ; State Key Laboratory of Environment-Friendly Energy Materials, School of Materials Science and Technology, Southwest University of Science and Technology, Mianyang 621010, China.
  • Li Q; State Key Laboratory of Environment-Friendly Energy Materials, School of Materials Science and Technology, Southwest University of Science and Technology, Mianyang 621010, China.
  • Royal G; State Key Laboratory of Environment-Friendly Energy Materials, School of Materials Science and Technology, Southwest University of Science and Technology, Mianyang 621010, China.
  • Courtois J; CNRS, DCM, University Grenoble Alpes, 38000 Grenoble, France.
  • Yan M; State Key Laboratory of Environment-Friendly Energy Materials, School of Materials Science and Technology, Southwest University of Science and Technology, Mianyang 621010, China.
  • Zhu Z; State Key Laboratory of Environment-Friendly Energy Materials, School of Materials Science and Technology, Southwest University of Science and Technology, Mianyang 621010, China.
  • Almásy L; Key Laboratory of Neutron Physics and Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621999, China.
Langmuir ; 36(17): 4820-4826, 2020 May 05.
Article in En | MEDLINE | ID: mdl-32275446
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.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Langmuir Journal subject: QUIMICA Year: 2020 Type: Article Affiliation country: China
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PubMed Links
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Langmuir Journal subject: QUIMICA Year: 2020 Type: Article Affiliation country: China