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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Epoxy monomers obtained from castor oil using a toxicity-free catalytic system

Texto completo
Autor(es):
Parada Hernandez, Natalia L. ; Bonon, Anderson J. ; Bahu, Juliana O. ; Barbosa, Maria Ingrid R. ; Wolf Maciel, Maria Regina ; Maciel Filho, Rubens
Número total de Autores: 6
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL; v. 426, n. B, SI, p. 550-556, JAN 2017.
Citações Web of Science: 11
Resumo

In order to obtain monomers from vegetable source, the castor oil epoxidation process was investigated. The catalytic system used in this work, H2O2/alumina/ethyl acetate, can be considered as a green system, free of heavy metals and toxic solvents. These characteristics make the system appropriate for the purpose of this study since they increase the probabilities of obtaining a biomaterial with the desired specifications regarding toxicity. Reaction conditions of castor oil epoxidation were optimized using methyl ricinoleate as a model compound. In order to identify the operating region, it was developed an experimental design 2(3) with 17 assays (6 axial points and central point in triplicate) in which, methyl ricinoleate, hydrogen peroxide and catalyst initial quantities in the reaction mixture were the studied variables. The system showed great efficiency with 100% of selectivity in the methyl ricinoleate epoxide production. In optimized conditions, it showed conversion of 99% in 6 h. It was obtained a conversion of 94%, an epoxidation percentage of 84 and a selectivity of 89% toward the epoxides for the castor oil epoxidation. These results show the efficacy of the catalytic system used in this work. Epoxidized castor oil structure was confirmed by FTIR, Raman and H-1 NMR techniques. (C) 2016 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 09/16480-6 - Síntese de biopolímeros epoxídicos a partir de fontes renováveis para construção de dispositivos biomédicos utilizando técnicas de prototipagem rápida e biofabricação
Beneficiário:Maria Ingrid Rocha Barbosa Schiavon
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 08/57860-3 - BIOFABRIS - Instituto de Biofabricação
Beneficiário:Rubens Maciel Filho
Linha de fomento: Auxílio à Pesquisa - Temático