Structure-property relationship of new polyimide-organically modified silicate-phosphotungstic acid hybrid material system

Autor(es)

Ferreira, Fabio A. S. ^[1] ; Amaral, Thiago ^[2] ; Elguera Ysnaga, Orlando Armando ^[1] ; Pereira-da-Silva, Marcelo A. ^{[3, 4]} ; Lopes, Jose H. ^[5] ; Lewicki, James P. ^[6] ; Worsley, Marcus A. ^[6] ; Schneider, Jose F. ^[7] ; Tremiliosi-Filho, Germano ^[8] ; Rodrigues-Filho, Ubirajara P. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Quim Sao Carlos, Grp Quim Mat Hibridos & Inorgan, BR-13563120 Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo, Inst Fis Sao Carlos, Grp Crescimento Cristais & Mat Ceram, BR-13560970 Sao Carlos, SP - Brazil

^[3] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil

^[4] UNICEP, Ctr Univ Cent Paulista, BR-13563470 Sao Carlos, SP - Brazil

^[5] 3M Brasil Ltda, Lab Pesquisa Corp, BR-14001970 Ribeirao Preto, SP - Brazil

^[6] Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA 94550 - USA

^[7] Univ Sao Paulo, Inst Fis Sao Carlos, Grp Ressonancia Magnet Nucl, BR-13560970 Sao Carlos, SP - Brazil

^[8] Univ Sao Paulo, Inst Quim Sao Carlos, Grp Eletroquim, Caixa Postal 780, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Materials Science; v. 51, n. 10, p. 4815-4824, MAY 2016.
• Citações Web of Science: 5

Resumo

A new hybrid material system was successfully developed from the combination of polyimide (PI), organically modified silicate (ORMOSIL), and phosphotungstic acid (HPW) from polycondensation reactions and sol-gel process. The materials were obtained in the form of flexible and free-standing films, with the formation of PI and ORMOSIL network confirmed by Fourier transform infrared. Solid-state phosphorus-31 nuclear magnetic resonance evaluated the HPW structure and confirmed its presence and also structural integrity in the materials after synthesis procedure. Thermogravimetric analysis revealed that the materials were thermally stable up to 773 K, and scanning electron microscopy images and X-ray microfluorescence mapping showed very good compatibility between the organic and inorganic phases with ORMOSIL improving the HPW dispersion. Furthermore, both ORMOSIL and HPW enhanced the permittivity of the materials from 2.5 to 4.3, compared to the neat PI, appointing them as potential candidates for electric and electronic applications. (AU)

• Processo FAPESP: 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros
• Beneficiário: Edgar Dutra Zanotto
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs