Aqueous Nanofluids based on Thioglycolic acid-coated copper sulfide nanoparticles for heat-exchange applications

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Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorGoiano Fed Inst Educ Sci & Technol-
Autor(es): dc.creatorSantos, Caio Carvalho dos [UNESP]-
Autor(es): dc.creatorViali, Wesley Renato [UNESP]-
Autor(es): dc.creatorNunes Viali, Eloiza da Silva-
Autor(es): dc.creatorJafelicci Jr, Miguel [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:06:17Z-
Data de disponibilização: dc.date.available2022-02-22T00:06:17Z-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-09-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.molliq.2020.113391-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/195604-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/195604-
Descrição: dc.descriptionWe report the one-pot synthesis of an aqueous nanofluid (NF) with improved thermal conductivity and with high colloidal stability. The thermal conductivity showed an increase of 38% (relative to the base fluid) for NF with a volumetric fraction (phi) of 0.06%, and the NF was stable for over 900 days in the stationary state. e. Aqueous NF based on thioglycolic acid (TGA) - coated copper sulfide nanoparticles (NPCu(2-x)S) was synthesized by the chemical reduction method. The (NPCu(2-x)S) characterization by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) indicated the formation of copper(I) sulfide. Transmission electron microscopy (TEM) allowed the morphology to be characterized and the size of the nanomaterials obtained, with an average diameter of 5.4 +/- 1.9 nm. Zeta potential and dynamic light scattering were used to evaluate the colloidal stability of Ni, where the NF showed -29 mV and 23 nm, respectively, for the Ni in slightly basic pH. The colloidal stability by DLS in function of the temperature showed minor variations of the hydrodynamic diameter (D-h) under heating/cooling cycles; the D-h increased with increased temperature, but the process was reversible, as was shown in the cooling step, and did not indicate the absence of aggregation or dissolution of the (NPCu(2-x)S) present in the aqueous NF. (C) 2020 Elsevier B.V. All rights reserved.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionBrazilian agency FINEP-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionSao Paulo State Univ Julio de Mesquita Filho, Inst Chem Araraquara, BR-14800060 Sao Paulo, SP, Brazil-
Descrição: dc.descriptionGoiano Fed Inst Educ Sci & Technol, Rodovia Sul Goiano Km 01, BR-75901970 Rio Verde, Go, Brazil-
Descrição: dc.descriptionSao Paulo State Univ Julio de Mesquita Filho, Inst Chem Araraquara, BR-14800060 Sao Paulo, SP, Brazil-
Descrição: dc.descriptionFAPESP: 2015/126385-
Formato: dc.format10-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier B.V.-
Relação: dc.relationJournal Of Molecular Liquids-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectColloidal stability-
Palavras-chave: dc.subjectNanopartides-
Palavras-chave: dc.subjectChemical reduction-
Palavras-chave: dc.subjectThermal conductivity-
Título: dc.titleAqueous Nanofluids based on Thioglycolic acid-coated copper sulfide nanoparticles for heat-exchange applications-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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