Affiliation:
1. Laboratory of Polymers and Materials Innovation, Department of Organic and Inorganic Chemistry, Sciences Center Federal University of Ceará Fortaleza Brazil
2. Institut für Organische Chemie Universität Tübingen Tübingen Germany
3. Chemistry Institute Federal University of Rio Grande do Sul Porto Alegre Brazil
Abstract
AbstractGlycerol is produced on a large scale as a byproduct in the biodiesel market. In order to give an application to glycerol, this work uses diglycerol from synthesized polyglycerol and commercial triglycerol in the synthesis of long chain esters obtained from esterification and transesterification reactions with oleic acid, methyl oleate, and epoxidized methyl oleate. Diglycerol tetraoleate (DGMO), epoxidized diglycerol tetraoleate (DGEMO), and triglycerol pentaoleate (TGOA) were synthesized and characterized by 1H and 13C Nuclear Magnetic Resonance (NMR) and infrared (IR) spectroscopy. Polyglycerol esters were evaluated for basic lubrication properties such as density, kinematic viscosity, viscosity index, melting point, and thermo‐oxidative stability. The ester that showed best thermo‐oxidative stability was DGEMO. In addition, the influence of esters synthesized as additives in a pure paraffinic oil lubricant was evaluated and the TGOA showed greater change in viscosity at 100 and 40°C and in melting point which was increased by 1.56°C.
Funder
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Fundação Cearense de Apoio ao Desenvolvimento Científico e Tecnológico
Conselho Nacional de Desenvolvimento Científico e Tecnológico