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

Author(s)

Bispo-Jr, Airton Germano ; Pires, Ana Maria ^{[1, 2]} ; Marques Lima, Sergio Antonio ^{[1, 2]} ; Cardoso, Celso Xavier ^[1]

Affiliation

^[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

• Document type: Journal article
• Source: SOLID STATE SCIENCES; v. 92, p. 24-30, JUN 2019.
• Web of Science Citations: 0

Abstract

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)

• FAPESP's process: 16/20421-9 - Tricolor devices based on Ba2SiO4:Eu3+ e/ou Tb3+: sol-gel synthesis and eletrophoretic deposition for W-LEDs application
• Grantee: Airton Germano Bispo Júnior
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 12/13876-9 - Optical and Structural effects of Eu(III) doping ion concentration in the Ba2SiO4 host lattice synthesized via sol-gel method
• Grantee: Airton Germano Bispo Júnior
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 15/10394-1 - LBL luminescent thin films of rare earth doped Ba2SiO4 obtained via sol-gel for white LED application
• Grantee: Airton Germano Bispo Júnior
• Support Opportunities: Scholarships in Brazil - Master