Mg2+-doped poly(ε-caprolactone)/siloxane biohybrids

• Autor(a) principal: Teixeira, J. C. S.
• Data de Publicação: 2010
• Outros Autores: Fernandes, M., Zea Bermudez, V. de, Barbosa, P. C., Rodrigues, L. C., Silva, Maria Manuela, Smith, Michael John
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/1822/13545
• topic: Magnesium salts; Solid polymer electrolyte; Magnesium triflate; Ionic conductivity; Thermal analysis; Poly(epsilon-caprolactone)/siloxane biohybrid; Poly(ε-caprolactone)/siloxane biohybrid; Science & Technology

Electrolytes based on a poly(ε-caprolactone) (PCL)/siloxane organic/inorganic host framework doped with magnesium triflate (Mg(CF3SO3)2) were synthesized by the sol-gel process. In the biohybrid matrix short PCL chains are covalently bonded via urethane linkages to the siliceous network. In this study the salt content of samples was identified using the conventional n notation, where n indicates the number of (C(=O)(CH2)5O) PCL repeat units per Mg2+ ion. Materials with compositions ranging from n=∞ to 2 were prepared. The only composition prepared that is not entirely amorphous is that with n = 1. Xerogels with n ≥ 7 are thermally stable up to up to at least 200 ºC. The most conducting ormolyte of the series is that with n = 26 (5.9x10-9 and 9.8x10-7 Scm-1 at 24 and 104 ºC, respectively).