Preparation of Core–Shell Structure W/Gd2O3 and Study on the Properties of Radiation Protection Materials

Abstract

W/Polydopamine (PDA) was prepared by adding W powder into the dopamine (DA) solution and adjusting the pH value of the solution. PDA contains several phenolic hydroxyl and amino groups, which provide abundant active sites for the complexation of metal ions. Therefore, we prepared W/Gd2O3 with core–shell structure by self-assembly method and homogeneous precipitation method, respectively. At the same time, polyurethane (PU) coating fabrics with W and Gd2O3 mixed powder and core–shell W/Gd2O3 powder were prepared, and their X-ray protection performance was tested. Results show that compared with W and Gd2O3 mixed powder PU coating fabrics, the protection efficiency and lead equivalent of core–shell structure W/Gd2O3 powder PU coating fabrics against different energy rays are obviously improved. With the increase in incident energy, the protective efficiency of core–shell structure W/Gd2O3 powder PU coating fabric decreases more slowly than that of W/Gd2O3 mixed powder PU coating fabric. When the incident energy is 65–100 keV, the protective efficiency of the core–shell structure W/Gd2O3 powder PU coating fabric is above 60%, showing a good synergistic protective effect. When the incident energy is 83 keV, the X-ray protection efficiency of core–shell W/Gd2O3 powder PU coating fabric is 65.5%, and the lead equivalent is 0.4051 mmPb.

Functional Bi2O3/Gd2O3 Silica-Coated Structures for Improvement of Early Age and Radiation Shielding Performance of Cement Pastes

“…However, based on the polymer [ 36 , 37 ] and glass [ 38 ] technology experiences, in order to properly and effectively improve the radiation shielding of material it is necessary to use a combination of particles countering specific radiation sources [ 39 ]. It can be achieved either by mixing particular materials separately or by producing advanced functional fillers such as W/Gd 2 O 3 structures [ 40 , 41 ] or cobalt-doped titania nanocomposites [ 42 ]. To date, the latter approach has not been reported in the literature related to concrete technology.…”

Biocompatible Hollow Gadolinium Oxide Nanocarriers for the Transport of Bioactive Molecules to Cells

“…Among several nanomaterials, gadolinium oxide nanoparticles (Gd 2 O 3 -NPs) have gained significant attention for their perspective applications in magnetic resonance imaging, luminescence devices, as well as microelectronics due to their high density of Gd 3+ ions per particle and surface-to-volume ratio, resulting in increased water coordination sites and rotational correlation time compared to typical Gd 3+ complexes. ,, Additionally, the small-sized Gd 2 O 3 -NPs decrease the tumbling rate of molecules, leading to increased relaxivity values. , Moreover, gadolinium-based nanomaterials are efficient probes for imaging experiments due to their high surface-to-volume ratio and enhanced magnetic properties of ultrafine particles; − , however, their biological applications face certain challenges due to insufficient biocompatibility caused by the leaching of toxic gadolinium ions . In recent years, there has been progress in enhancing the biocompatibility and long-term safety of Gd 2 O 3 -based materials by coating them with adequate overlayers including silica, catechol ligands, hydrophilic polymers, and doped shell materials. − These approaches not only safeguard fluorescence imaging but also open doors for the use of gadolinium-based materials for therapy in view of their longer blood circulation time and precise labeling in different rat models including breast and osteosarcoma cells (MCF-7 and MG63). − ,− …”