Influence of polymer insertion on the dielectric, piezoelectric and acoustic properties of 1-0-3 polyurethane/cement-based piezo composite

Autor(es)

Sanches, A. O. ^[1] ; Teixeira, G. F. ^[2] ; Zaghete, M. A. ^[3] ; Longo, E. ^[4] ; Malmonge, J. A. ^[1] ; Silva, M. J. ^[5] ; Sakamoto, W. K. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista UNESP, Fac Engn, Campus Ilha Solteira, Av Brasil 56, BR-15385000 Ilha Solteira, SP - Brazil

^[2] Univ Fed Goias, Inst Quim, Ave Esperanca S-N, Goiania, Go - Brazil

^[3] Univ Estadual Paulista Unesp, Inst Quim, Av Prof Francisco Degni 55, BR-14800900 Araraquara, SP - Brazil

^[4] Univ Fed Sao Carlos UFSCar, LIEC, Rodovia Washington Luis S-N, BR-13565905 Sao Carlos, SP - Brazil

^[5] Univ Estadual Paulista UNESP, Campus Expt Rosana, Ilha Solteira - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Materials Research Bulletin; v. 119, NOV 2019.
• Citações Web of Science: 0

Resumo

Cement/polyurethane based piezo composite was fabricated with 1-0-3 connectivity. Microstructural analysis shows that polyurethane (PU) acts as a binder, reducing the porosity and improving the matrix adhesion to the piezoelectric phase. Dielectric characterisation shows that PU strongly reduces both the interfacial polarisation process and the ionic mobility in the matrix, thus decreasing the dielectric constant and increasing the values of voltage constant (g(33)) and electromechanical coupling coefficient (k(t)). The composite was surface mounted on a porous concrete bar and evaluated as an acoustic emission sensor (AE). The results show that this material is a highly sensitive sensor for AE detection in the frequency range 50-220 kHz. (AU)

• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs