Preparation of renewable bio-polyols from two species of colliguaja for rigid polyurethane foams
Autor
Mirabal-Gallardo, Yaneris
Bustamante, Carlos
Contreras-González, Jorge
Valdés-Lizama, Oscar
De la Torre, Alexander F.
Fecha
2018Resumen
In this study, we investigated the potential of two non-edible oil extracts from seeds of
Colliguaja integerrima (CIO) and Colliguaja salicifolia (CSO) to use as a renewable source for polyols
and, eventually, polyurethane foams or biodiesel. For this purpose, two novel polyols from the
aforementioned oils were obtained in a one-single step reaction using a mixture of hydrogen peroxide
and acetic acid. The polyol derivatives obtained from the two studied oils were characterized by
spectral (FTIR, 1H NMR, and 13C NMR), physicochemical (e.g., chromatographic analysis, acid
value, oxidizability values, iodine value, peroxide value, saponification number, kinematic viscosity,
density, theorical molecular weight, hydroxyl number, and hydroxyl functionality) and thermal
(TGA) analyses according to standard methods. Physicochemical results revealed that all parameters,
with the exception of the iodine value, were higher for bio-polyols (CSP and CIP) compared to the
starting oils. The NMR, TGA, and FTIR analyses demonstrated the formation of polyols. Finally, the
OH functionality values for CIP and CSP were 4.50 and 5.00, respectively. This result indicated the
possible used of CIP and CSP as a raw material for the preparation of polyurethane rigid foams.
Fuente
Materials, 11(11), 2244Identificador DOI
doi.org/10.3390/ma11112244Colecciones
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