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Título : Sensory polymeric foams as a tool for improving sensing performance of sensory polymers
Autor : Pascual Portal, Blanca Sol
Vallejos Calzada, Saúl
Ramos Rodríguez, Cipriano
Sanz Díez, Mª Teresa
Reglero Ruiz, José A.
García García, Félix Clemente
García Pérez, José Miguel
Publicado en: Sensors, 2018, V. 18, n. 12, 4378
Editorial : MDPI
Fecha de publicación : dic-2018
ISSN : 1424-8220
DOI: 10.3390/s18124378
Resumen : Microcellular sensory polymers prepared from solid sensory polymeric films were tested in an aqueous Hg(II) detection process to analyze their sensory behavior. First, solid acrylic-based polymeric films of 100 µm thickness were obtained via radical copolymerization process. Secondly, dithizone sensoring motifs were anchored in a simple five-step route, obtaining handleable colorimetric sensory films. To create the microporous structure, films were foamed in a ScCO2 batch process, carried out at 350 bar and 60 °C, resulting in homogeneous morphologies with cell sizes around 5 µm. The comparative behavior of the solid and foamed sensory films was tested in the detection of mercury in pure water media at 2.2 pH, resulting in a reduction of the response time (RT) around 25% and limits of detection and quantification (LOD and LOQ) four times lower when using foamed films, due to the increase of the specific surface associated to the microcellular structure.
Palabras clave: sensory films
microcellular polymer
ScCO2 foaming
mercury detection
Materia: Química orgánica
Chemistry, Organic
Licencia: https://creativecommons.org/licenses/by/4.0/
URI : http://hdl.handle.net/10259/5043
Versión del editor: https://doi.org/10.3390/s18124378
Aparece en las colecciones: Artículos BIOIND
Artículos POLYMERS

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