Biolubricants derived from Brazilian Cerrado for drilling under hybrid lubrication/cooling.

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dc.contributorFEDERAL UNIVERSITY OF MINAS GERAIS, BELO HORIZONTE, MG 31270-901, BRAZIL; FEDERAL UNIVERSITY OF MINAS GERAIS, BELO HORIZONTE, MG 31270-901, BRAZIL; FEDERAL UNIVERSITY OF MINAS GERAIS, BELO HORIZONTE, MG 31270-901, BRAZIL; FEDERAL UNIVERSITY OF MINAS GERAIS, BELO HORIZONTE, MG 31270-901, BRAZIL; FEDERAL CENTER FOR TECHNOLOGICAL EDUCATION OF MINAS GERAIS - CEFET-MG, BELO HORIZONTE, MG; FEDERAL UNIVERSITY OF MINAS GERAIS, BELO HORIZONTE, MG 31270-901, BRAZIL; DANIEL SOUZA CORREA, CNPDIA; FEDERAL UNIVERSITY OF MINAS GERAIS, BELO HORIZONTE, MG 31270-901, BRAZIL; FEDERAL UNIVERSITY OF MINAS GERAIS, BELO HORIZONTE, MG 31270-901, BRAZIL.
dc.creatorDUARTE, F. J.
dc.creatorPAES, V. F.
dc.creatorSANTOS, F. V. dos
dc.creatorCUNHA, A. L.
dc.creatorSANTOS, A. J. dos
dc.creatorPORTO, M. P.
dc.creatorCORREA, D. S.
dc.creatorCORGOZINHO, C. N. C.
dc.creatorABRÃO, A. M.
dc.date2026-06-08T19:57:02Z
dc.date2026-06-08T19:57:02Z
dc.date2026-06-08
dc.date2026
dc.date.accessioned2026-07-07T04:30:01Z
dc.descriptionAmid the intensification of extreme climatic events, the demand to transition from an economy reliant on fossil resources to sustainable alternatives has become critical, particularly in industrial processes that depend heavily on petroleum-derived products, such as conventional cutting fluids. In this context, the present study investigates a hybrid lubrication-cooling strategy utilizing biolubricants derived from native species of the Brazilian Cerrado, macaúba and pequi, as environmentally responsible alternatives to conventional cutting fluids. These bio lubricants were synthesized via a sequence of transesterification, epoxidation, and epoxide ring-opening. The structural and physicochemical properties were characterized through FTIR, NMR, thermogravimetric analysis, and Rancimat testing. Chemical modification significantly enhanced both wettability and rheological behavior, thereby reducing contact angles and improving viscosity under shear and elevated temperatures. During the drilling of AISI H13 steel under a hybrid system of minimum quantity lubrication (MQL) assisted by a vortex tube, both biolubricants demonstrated performance comparable to a commercial cutting fluid and superior to dry cutting, despite the absence of additives in their formulations. Long-wavelength infrared thermography, com bined with contact temperature measurements, was used to assess the thermal performance of cutting fluids across different cutting parameters relative to dry cutting. Under severe drilling conditions, the hybrid lubrication-cooling strategy resulted in reductions of 11% in thrust force, 14% in torque, and approximately 45% in drilling temperature, accompanied by improvements in hole surface roughness of up to 112%. These findings highlight the technical and environmental feasibility of hybrid MQL-vortex tube systems using biolubricants as eco-friendly solutions for drilling processes.
dc.format16 p.
dc.identifierFuel, v. 422, 139060, 2026.
dc.identifier0016-2361
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1187383
dc.identifierhttps://doi.org/10.1016/j.fuel.2026.139060
dc.identifier.urihttp://hdl.handle.net/123456789/463271
dc.languageeng
dc.rightsopenAccess
dc.subjectBiolubricant
dc.subjectMetalworking fluid
dc.subjectAISI H13 steel
dc.subjectGreen materials
dc.subjectSustainability
dc.titleBiolubricants derived from Brazilian Cerrado for drilling under hybrid lubrication/cooling.
dc.typeArtigo de periódico

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