Utilização de líquidos iônicos na esfoliação em fase líquida do grafite e aplicação na formação de nanocompósitos condutores de polímero-grafeno para impressão 3D

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dc.contributor.advisorSouza, Eunézio Antonio de
dc.contributor.advisor-co1Donato, Ricardo Keitel
dc.contributor.advisor-co1Latteshttp://lattes.cnpq.br/4933879102244479por
dc.contributor.advisor1Latteshttp://lattes.cnpq.br/9756214150140645por
dc.contributor.authorGodoy, Anna Paula
dc.creator.Latteshttp://lattes.cnpq.br/8812774070079602por
dc.date.accessioned2019-08-15T14:16:03Z
dc.date.accessioned2020-05-28T18:08:03Z
dc.date.available2020-05-28T18:08:03Z
dc.date.issued2019-03-20
dc.description.abstractThis thesis reports on graphene production by graphite liquid phase exfoliation (LPE) in biphasic system containing ionic liquid (IL) and its application in conductive polymeric nanocomposites’ synthesis for 3D printing by Fusion Depostion Molding (FDM) technique. For better understanding, the activities were divided into three steps and performed in parallel or sequentially as specified below. In the first step, a graphite LPE protocol using a water/dichloromethane biphasic liquid system with 1,3-dibenzylimidazolium benzoate and 1,3-dibenzylimidazolium naphthoate ILs is described. The combination of ILs-biphasic system improved the exfoliation efficiency and emulsion stability and decreased the damages by cavitation. Emulsion stability and ILs-graphene interaction were studied by Dynamic Light Scattering (DLS) and Density Functional Theory (DFT), respectively. Raman Spectroscopy, Scanning Electronic (SEM), Transmission (TEM) and Atomic Force (AFM) microscopies, and X-ray Diffraction (XRD) results showed high quality and exfoliation level of produced graphene. In parallel, in step 2, poly(lactic) acid (PLA) nanocomposites with graphene nanoplatelets (GNP) and carbon nanotubes (MWCNTs) as fillers obtained by melt extrusion were studied in terms of filler concentration and presence of bi-fillers effect in electrical and thermal conductivities. The goal was to verify which filler concentration surpasses the electrical percolation threshold while maintaining the processability for FDM. Nanocomposites with 6 wt.% of GNP or MWCNT, or both, showed electrical conductivities values of 6 decades order of magnitude higher than pure PLA and increasing of 181% in thermal conductivity. In step 3, is showed the polyvinyl alcohol (PVOH) nanocomposite production with 6 wt.% of graphene, concentration optimized in step 2, and obtained by graphite LPE described in step 1, using 1-benzyl-3-methylimidazolium chloride (BnzMImCl) and 1,3-dibenzylimidazolium chloride (Bnz)2ImCl. The imidazole-based ILs demonstrated to be valuable to prevent graphene re-aggregation. These were characterized by optical microscopy, SEM, Raman and electrical conductivity, and showed potencial aplicability in FDM, due to the good filler-polymer interaction and electrical conductivity.eng
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superiorpor
dc.description.sponsorshipFundo Mackenzie de Pesquisapor
dc.formatapplication/pdf*
dc.identifier.citationGODOY, Anna Paula. Utilização de líquidos iônicos na esfoliação em fase líquida do grafite e aplicação na formação de nanocompósitos condutores de polímero-grafeno para impressão 3D. 2019. 104 f. Tese ( Engenharia Elétrica) - Universidade Presbiteriana Mackenzie, São Paulo.por
dc.identifier.urihttp://dspace.mackenzie.br/handle/10899/24293
dc.keywordsgrapheneeng
dc.keywordsliquid phase exfoliationeng
dc.keywordsbiphasic systemeng
dc.keywordsionic liquidseng
dc.keywordspolymeric nanocompositeseng
dc.keywords3D printingeng
dc.languageporpor
dc.publisherUniversidade Presbiteriana Mackenziepor
dc.rightsAcesso Abertopor
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectgrafenopor
dc.subjectesfoliação em fase líquidapor
dc.subjectsistema bifásicopor
dc.subjectlíquidos iônicospor
dc.subjectnanocompósitos poliméricospor
dc.subjectimpressão 3Dpor
dc.subject.cnpqCNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ANALITICA::ELETROANALITICApor
dc.subject.cnpqCNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ANALITICA::INSTRUMENTACAO ANALITICApor
dc.subject.cnpqCNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICApor
dc.subject.cnpqCNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICApor
dc.thumbnail.urlhttp://tede.mackenzie.br/jspui/retrieve/19288/Anna%20Paula%20Godoy.pdf.jpg*
dc.titleUtilização de líquidos iônicos na esfoliação em fase líquida do grafite e aplicação na formação de nanocompósitos condutores de polímero-grafeno para impressão 3Dpor
dc.typeTesepor
local.contributor.board1Saito, Lúcia Akemi Miyazato
local.contributor.board1Latteshttp://lattes.cnpq.br/0915583034741895por
local.contributor.board2Fechine, Guilhermino José Macêdo
local.contributor.board2Latteshttp://lattes.cnpq.br/8109533360196619por
local.contributor.board3Mauler, Raquel Santos
local.contributor.board3Latteshttp://lattes.cnpq.br/3120810650181134por
local.contributor.board4Seoud, Omar Abou El
local.contributor.board4Latteshttp://lattes.cnpq.br/6098493050474490por
local.publisher.countryBrasilpor
local.publisher.departmentEscola de Engenharia Mackenzie (EE)por
local.publisher.initialsUPMpor
local.publisher.programEngenharia Elétricapor
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Engenharia Elétrica e Computação - Teses - EE Higienópolis