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El-Sharkawy RM, Abdou FS, Gizawy M, Allam EA, Mahmoud ME. Bismuth oxide nanoparticles (Bi2O3 NPs) embedded into recycled- poly(vinyl chloride) plastic sheets as a promising shielding material for gamma radiation. Radiat Phys Chem Oxf Engl 1993 2023. [DOI: 10.1016/j.radphyschem.2023.110838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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Cai T, He F, Li Y, Li Y, Jiang Z, Li J, Zhou Y, Chen Z, Yang W. Flexible and Mechanically Enhanced Polyurethane Composite for γ-ray Shielding and Thermal Regulation. ACS APPLIED MATERIALS & INTERFACES 2023; 15:4690-4702. [PMID: 36634206 DOI: 10.1021/acsami.2c18252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Microencapsulation of paraffin with lead tungstate shell (Pn@PWO) shows the drawbacks of low wettability and poor leakage-proof property and thermal reliability, restricting the application of phase change microcapsules. Herein, a novel paraffin@lead tungstate@silicon dioxide double-shelled microcapsule (Pn@PWO@SiO2) has been successfully constructed by the emulsion-templated interfacial polycondensation and applied in the waterborne polyurethane (WPU). The results indicated that a SiO2 layer with controlled thickness was formed on the PbWO4 shell. The Pn@PWO@SiO2 microcapsules have exhibited superior leakage-proof properties and thermal reliability through double-shelled protection, and the leakage rate decreased by at least 54.11% compared to that of Pn@PWO microcapsules. The SiO2 layer with abundant polar groups ameliorated the wettability of microcapsules and the interfacial compatibility between microcapsules and the WPU matrix. The tensile strength of WPU/Pn@PWO@SiO2-2 composites reached 10.98 MPa, which was over 7 times greater than that of WPU/Pn@PWO composites. In addition, WPU/Pn@PWO@SiO2-2 composites with a latent heat capacity of over 41 J/g exhibited efficient phase change stability and γ-ray shielding properties. Also, the mass attenuation coefficients reached 1.38 cm2/g at 105.3 keV and 1.12 cm2/g at 86.5 keV, respectively. These properties will greatly promote the application of WPU/Pn@PWO@SiO2 composites into γ-ray-shielding devices with thermal regulation.
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Affiliation(s)
- Tianyu Cai
- State Key Laboratory of Environmental-Friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Sichuan 621010, China
| | - Fangfang He
- State Key Laboratory of Environmental-Friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Sichuan 621010, China
| | - Yongsheng Li
- State Key Laboratory of Environmental-Friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Sichuan 621010, China
| | - Yingjun Li
- State Key Laboratory of Environmental-Friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Sichuan 621010, China
| | - Zhuoni Jiang
- State Key Laboratory of Environmental-Friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Sichuan 621010, China
| | - Jiale Li
- State Key Laboratory of Environmental-Friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Sichuan 621010, China
| | - Yuanlin Zhou
- State Key Laboratory of Environmental-Friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Sichuan 621010, China
| | - Zhengguo Chen
- NHC Key Laboratory of Nuclear Technology Medical Transformation (Mianyang Central Hospital), Sichuan 621019, China
| | - Wenbin Yang
- State Key Laboratory of Environmental-Friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Sichuan 621010, China
- NHC Key Laboratory of Nuclear Technology Medical Transformation (Mianyang Central Hospital), Sichuan 621019, China
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