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    Convertible cellulosic platforms with manageable loads of 1-hydroxybenzotriazole: their preparation and conductive behavior

    Year: 2022

    Journal: Cellulose, Volume 29, DEC, page 9847–9863

    Authors: Culica, Madalina Elena; Chibac-Scutaru, Andreea-Laura; Asandulesa, Mihai; Melinte, Violeta; Cojocaru, Corneliu; Coseri, Sergiu

    Organizations: Ministry of Research,Innovation and Digitization,CNCS/CCCDI-UEFISCDI [PN-III-P4-ID-PCE-2020-0476]

    Keywords: Cellulose acetate; Cellulose; Composites; Fuel cells; Proton conductivity

    A homogenous approach for manufacturing films composites that might be used as proton conducting membranes has been developed. This is attributable to cellulose acetate's excellent solubility in organic solvents, allowing it to incorporate heterocyclic nitrogen molecules such as 1-hydroxybenzotriazole (HOBt) in varied amounts. These films are quickly and conveniently converted to cellulose, making them prone to further TEMPO-oxidation on the surface, altering their properties, having a significant influence on overall morphology and proton conductivity. The surface features (contact angle, water uptake), morphology (scanning electron microscopy), and component compliance of all produced films were evaluated (FTIR). Furthermore, thermal characteristics show that the addition of HOBt seems to have no impact on the film's stability. As anticipated by molecular docking simulations, the composites based on TEMPO-oxidized matrix exhibited the best proton conductivity over a wide temperature range when measured using broadband dielectric spectroscopy.
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