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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Evaluation of cryo-treatment in the luminescent properties of PVDF/Eu2O3 composite obtained by using buriti oil as additive

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Autor(es):
Bispo-Jr, Airton Germano ; Pires, Ana Maria [1, 2] ; Marques Lima, Sergio Antonio [1, 2] ; Cardoso, Celso Xavier [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Bispo-Jr, Jr., Airton Germano, Sao Paulo State Univ, UNESP, Sch Technol & Sci, R Roberto Simonsen 305, BR-19060900 Presidente Prudente, SP - Brazil
[2] Bispo-Jr, Jr., Airton Germano, Sao Paulo State Univ, UNESP, Inst Biosci Humanities & Exact Sci, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: SOLID STATE SCIENCES; v. 92, p. 24-30, JUN 2019.
Citações Web of Science: 0
Resumo

Polymeric matrices containing luminescent particles find many applications like temperature sensor platforms. However, it is important to understand the impact of the particle immobilization on the polymer structural and optical properties in order to optimize its performance. Therefore, in this study, a new luminescent polymeric composite was fabricated by combining poly (vinylidene fluoride) (PVDF), buriti oil (BO) and Eu2O3 particles, evaluating the membrane luminescent properties before and after a cryo-treatment with liquid N-2 in order to enhance the Eu(III) emission. Also, the influence of Eu2O3 particles and BO in the polymer structural, thermal, morphological and optical properties was evaluated. The composite membranes with bandgap lying between 5.60 and 5.90 eV were obtained as gamma-PVDF phase after being dried at 100 degrees C, with spheroidal particles connected by necks. The PVDF membranes are very stable till temperatures as high as 370 degrees C, and the Eu2O3 particle addition increases the membrane thermal stability while the BO decreases the PVDF stability. The cryo-treatment with N-2 increases the PVDF crystallinity, leading to the PVDF particles agglomeration. The PVDF/BO/Eu2O3 membrane exhibited the characteristic red emission from Eu(III) along with an unexpected BO emission. Finally, after the cryo-treatment, the Eu3+ emission increases while the BO emission vanishes, and due to this temperature sensitivity, the system shows potential to be applied in temperature sensor platforms. (AU)

Processo FAPESP: 16/20421-9 - Dispositivos tricromáticos a base de Ba2SiO4:Eu3+ e/ou Tb3+: síntese sol-gel e deposição eletroforética visando aplicação em LEDs brancos
Beneficiário:Airton Germano Bispo Júnior
Linha de fomento: Bolsas no Brasil - Doutorado Direto
Processo FAPESP: 12/13876-9 - Efeitos ópticos e estruturais da variação da concentração do íon dopante Eu(III) na matriz Ba2SiO4 sintetizada via sol-gel
Beneficiário:Airton Germano Bispo Júnior
Linha de fomento: Bolsas no Brasil - Iniciação Científica
Processo FAPESP: 15/10394-1 - Filmes LBL luminescentes de Ba2SiO4 dopado com terras raras obtido via sol-gel para aplicação em LEDs brancos
Beneficiário:Airton Germano Bispo Júnior
Linha de fomento: Bolsas no Brasil - Mestrado