Spectroscopic characterization and thermal behavior of baru nut and macaw palm vegetable oils and their epoxidized derivatives

Autor(es)

Alarcon, Rafael T. ^[1] ; Gaglieri, Caroline ^[1] ; Lamb, Katie J. ^[2] ; North, Michael ^[2] ; Bannach, Gilbert ^[1]

Afiliação do(s) autor(es)

^[1] UNESP Sao Paulo State Univ, Sch Sci, Dept Chem, BR-17033260 Bauru, SP - Brazil

^[2] Univ York, Green Chem Ctr Excellence, Dept Chem, York YO10 5DD, N Yorkshire - England

• Tipo de documento: Artigo Científico
• Fonte: INDUSTRIAL CROPS AND PRODUCTS; v. 154, OCT 15 2020.
• Citações Web of Science: 1

Resumo

The ability to produce new and renewable, epoxidized Brazilian vegetable oils from baru nut (Dipteryx alata Vogel) and macaw palm (Acrocomia aculeata) oil, using a fast and clean heterogeneous catalytic method, was investigated. The Wijs method and Proton Nuclear Magnetic Resonance (H-1-NMR) analysis were utilized, and compared to one another, to calculate the iodine value (IV), average number of double bonds (DBaverage) and fatty acid content, and thus degree of epoxidation, for both vegetable oils. This analysis indicated that alkene conversions of > 99% and 95.3% were obtained for baru nut oil and macaw palm oil, respectively; which is an excellent result when compared with some works in literature. The epoxidized Baru nut oil is a solid at room temperature, which was related to the percentage of mono-unsaturated fatty acids present in its structure. Epoxide samples were also analyzed via mid-Infrared Spectroscopy and C-13 NMR analysis. Thermogravimetry-differential thermal analysis (TG-DTA) was used to determine the thermal stability of these epoxidized oils. Differential Scanning Calorimetry (DSC) also provided information about their crystallization, melting and solid-solid transition processes. (AU)

• Processo FAPESP: 17/08820-8 - Síntese e caracterização de biopolímeros a partir de óleos vegetais e glicerol seguindo os princípios da química verde.
• Beneficiário: Gilbert Bannach
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 19/11493-4 - Modificação química de óleos vegetais brasileiros de macaúba e baru para obtenção de novos monomêros e polímeros pelas sínteses de maleinização, epoxidação e carbonatação
• Beneficiário: Rafael Turra Alarcon
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado