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Polímeros

versão impressa ISSN 0104-1428versão On-line ISSN 1678-5169

Resumo

MEDEIROS, Eliton Souto de et al. Development of stable polymeric cross-linked ultrathin films for sensor applications. Polímeros [online]. 2015, vol.25, n.spe, pp.40-47. ISSN 1678-5169.  https://doi.org/10.1590/0104-1428.1811.

A new method for producing stable films used in sensors is proposed, based on the layer-by-layer deposition of poly(o-ethoxyaniline) and phenol-formaldehyde (POEA/PF) followed by a thermal treatment to promote film crosslinking. The crosslinking process was characterized by Fourier transform infrared and ultraviolet-visible spectroscopic analyses, atomic force microscopy and desorption studies. Sensor analyses were also carried out in order to evaluate cross-linked sensor signal. Results showed that PF resin served as a curing agent, forming a semi-interpenetrating polymer network therefore producing stable films. Although there was a decrease in the sensitivity of sensors with crosslinking, such films are quite stable and can be potentially used in sensors, especially where higher stability is required.

Palavras-chave : conductive polymers; sensors; ultrathin films.

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