Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/32385
Título: | Synthesis and characterization of novel piezoelectric nitrile copolyimide films for high temperature sensor applications |
Autor(es): | Maceiras, A. Martins, P. San Sebastián, M. Lasheras, A. Silva, Marco Aurélio Pinto Laza, J. M. Vilas, J. L. Gutierrez, J. Lanceros-Méndez, S. Barandiarán, J. M. León, L. M. |
Palavras-chave: | Polyimide Piezoelectricity High temperature sensor |
Data: | Out-2014 |
Editora: | IOP Publishing Ltd |
Revista: | Smart Materials and Structures |
Citação: | Maceiras, A., Martins, P., San Sebastián, M., Lasheras, A., Silva, M., Laza, J. M., ... & León, L. M. (2014). Synthesis and characterization of novel piezoelectric nitrile copolyimide films for high temperature sensor applications. Smart Materials and Structures, 23(10), 105015. |
Resumo(s): | A series of amorphous polyimides and copolyimides containing nitrile were obtained by a two-step procedure. The first step consists on a polycondensation reaction of the 4,4’-oxydiphtalic anhydride (ODPA) with one or two aromatic diamines, namely 1,3-Bis-2-cyano-3-(3-aminophenoxy)phenoxybenzene (diamine 2CN) and 1,3-Bis(3-aminophenoxy)benzene (diamine 0CN). In the second step a thermal cyclodehydration converts each poly(amic acid) or copoly(amic acid) into their corresponding polyimide films. The piezoelectric response was improved after corona poling of the films. A maximum d33 modulus value of 16 pC·N-1 was obtained for the polymide with two cyano groups (poly 2CN) Polarization also showed time and thermal stability up to 160°C. Additionally, the thermal stability of the amorphous polyimides, (β-CN)APB/ODPA, was studied by determining the glass transition temperature (Tg) and thermal decomposition, through Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TG), respectively. The high piezoelectric response (1-16 pC·N-1), Tg (160-180ºC) and degradation temperature (315-450ºC) make such polyamides excellent candidates for their use as high temperature sensors. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/32385 |
DOI: | 10.1088/0964-1726/23/10/105015 |
ISSN: | 0964-1726 |
Versão da editora: | http://iopscience.iop.org/0964-1726/23/10/105015 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDF - FCD - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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HT-piezo.pdf Acesso restrito! | HT-piezo | 732,28 kB | Adobe PDF | Ver/Abrir |