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http://hdl.handle.net/1843/57943| Type: | Artigo de Periódico |
| Title: | Effects of the addition of MWCNT and ZrO2 nanoparticles on the dosimetric properties of PVDF |
| Authors: | Esther Lorrayne Machado Pereira Adriana de Souza Medeiros Batista Neriene Alves Arno Heeren de Oliveira Fabiola A.S. Ribeiro Adelina P. Santos Luiz Oliveira de Faria |
| Abstract: | The industrial application of radiation processing involves high doses of gamma or electron radiation to cause structural changes in materials, such as rubber vulcanization and polymer degradation, among others. A reliable dosimetric system is necessary to guarantee the desired effects and also to avoid damages. Poly(vinylidene fluoride) [PVDF] homopolymer has been recently proposed for application in high gamma dose dosimetry. In this work, nanocomposites made of PVDF filled with zirconium oxide [ZrO2] nanoparticles and multiwalled carbon nanotubes [MWCNT] were studied for applications in high dose dosimetry, for doses ranging from 100.0 kG to 2.72 MGy. Pristine PVDF and PVDF/MWCNT-ZrO2 samples were exposed to a Co-60 source. FTIR spectra were collected 2 h, 30 and 60 days after exposure. The intensity of the radio-induced absorption bands centered at 1715 cm−1and 1730 cm−1 were found to have an unambiguous relationship with the absorbed dose.The pristine PVDF samples show linear behavior in the dose range between 100 and 1000 kGy. However, the PVDF/MWCNT-ZrO2 samples show linearity in a larger range, i.e. between 500 and 2750 kGy interval. The melting latent heat, measured by Differential Scanning Calorimetry (DSC) and SEM micrographs revealed that PVDF/MWCNT-ZrO2 samples show increased resistance to the radio-induced damages, when compared to pure PVDF samples irradiated in the same conditions. The results indicate that the MWCNT-ZrO2 adds resistance to PVDF and improves its dosimetric properties. |
| Subject: | Nanocompósitos Raios gama |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ENG - DEPARTAMENTO DE ENGENHARIA NUCLEAR MED - DEPARTAMENTO DE ANATOMIA E IMAGEM |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | https://doi.org/10.1016/j.apradiso.2018.07.015 |
| URI: | http://hdl.handle.net/1843/57943 |
| Issue Date: | 11-Jul-2018 |
| metadata.dc.url.externa: | https://www.sciencedirect.com/science/article/pii/S0969804317314094?via%3Dihub |
| metadata.dc.relation.ispartof: | Applied Radiation and Isotopes |
| Appears in Collections: | Artigo de Periódico |
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