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Microscopic evolution of the conformation for polyamidoxime molecular chains under various uranium adsorption conditions

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Abstract

Among uranium extraction materials, amidoxime polymers are very promising. But the conformation of molecular chains is not well understood. Herein, conformation behavior of polyamidoxime (PAO) was analyzed via molecular dynamics. In water, the conformation of PAO is extended, its radius of gyration (Rg) is 12.5 Å. However, the Rg of polyacrylonitrile is merely 6.2 Å. The PAO conformation collapses due to uranyl and sodium ions. Moreover, small angle X-ray scattering showed that Rg from 11.6 to 11.0 nm after uranium adsorption. Overall, this work will be beneficial to the design of new uranium adsorbents.

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Acknowledgements

This work was supported by National Natural Science Foundation of China (Grant Nos. U2130125), Applied Basic Research Program of Science and Technology Department of Sichuan (2023NSFSC1959, 2023ZYD0027), CAEA Nuclear energy development and research project, Innovation and Development Fund of China Seawater Uranium Extraction Technology Innovation Alliance (CNNC-CXLM-202213), Experimental Technology Research Project (21syjs13) and Natural Science Foundation of Sichuan, China (2022NSFSC0284).

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Authors and Affiliations

  1. Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang, 621010, China

    Hao Peng, **aoyu Li, Yuanli Li, Lina Lv, Zhiyuan Du & Fangting Chi

  2. School of National Defence Science and Technology, Southwest University of Science and Technology, Mianyang, 621010, China

    Hao Peng, **aoyu Li, Zhiyuan Du & Fangting Chi

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  1. Hao Peng
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Correspondence to Fangting Chi.

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Peng, H., Li, X., Li, Y. et al. Microscopic evolution of the conformation for polyamidoxime molecular chains under various uranium adsorption conditions. J Radioanal Nucl Chem (2024). https://doi.org/10.1007/s10967-024-09572-w

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