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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Parada Hernandez, Natalia L. ; Bonon, Anderson J. ; Bahu, Juliana O. ; Barbosa, Maria Ingrid R. ; Wolf Maciel, Maria Regina ; Maciel Filho, Rubens
Total Authors: 6
Document type: Journal article
Source: JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL; v. 426, n. B, SI, p. 550-556, JAN 2017.
Web of Science Citations: 8
Abstract

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)

FAPESP's process: 09/16480-6 - Epoxy biopolymers synthesis from renewable sources for building biomedical devices using rapid prototyping techniques and biofabrication
Grantee:Maria Ingrid Rocha Barbosa Schiavon
Support type: Scholarships in Brazil - Post-Doctorate