Síntese e caracterização de partículas Janus (Si-Au)

Detalhes bibliográficos
Autor(a) principal: Zotelli, Maiara
Data de Publicação: 2021
Tipo de documento: Trabalho de conclusão de curso
Idioma: por
Título da fonte: Repositório Institucional da UFSCAR
Texto Completo: https://repositorio.ufscar.br/handle/ufscar/15767
Resumo: Janus are colloidal particles with more than a single type of chemistry or surface composition, and can be of diferent sizes and shapes. Their anisotropic structure (diferent characteristics in diferent directions) allows them to present multifunctional properties in the same particle, such as optical, chemical and magnetic properties, leading to several application opportunities, such as in industry and biomedicine. The purpose of this work was to develop a literature review on the main methodologies used to synthesize Janus particles, and also their main assembly properties in nanometric structures. In addition, it aimed to develop a methodology for the synthesis of Janus silica and gold (Si-Au) particles, using a Pickering emulsion with parafin and silica particles, followed by a process of functionalization of these particles exposed surfaces. Both silica and gold particles were obtained by chemical reaction. The silica particles were characterized in the equipment Scanning Mobility Particle Sizer (SMPS) and was obtained an average aerodynamic diameter of 25.85 +/- 1.57 nm, while the gold particles were characterized by spectrophotometry and was obtained an average diameter of 16.61 +/- 0.33 nm. The parafin solution with silica particles was observed under an optical microscope and it was possible to visualize micrometric droplets of the Pickering solution and, subsequently, the solution without the parafin and with the addition of gold after the functionalization of the silica particles was observed. The characterizations were not performed by SEM due to the current pandemic situation, however, such particles will be characterized in the future, and the results showed the attainment of Janus Si-Au particles. Although the application of Janus particles is not within the scope of this work, the methodology presented allows synthesizing such particles in large laboratory quantities, in the gram scale, and can be easily replicated and could also come to be scaled-up at an industrial level. Janus Si-Au particles have several application potentials, such as surfactants in oil-water emulsions, and many others in biomedicine and agriculture.
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spelling Zotelli, MaiaraBernardo, Andréhttp://lattes.cnpq.br/5705402824877708Machry, Karinehttp://lattes.cnpq.br/8863820504316400http://lattes.cnpq.br/62445854503248680e236f04-e59c-4081-af0f-4c54e16d53792022-03-28T20:13:10Z2022-03-28T20:13:10Z2021-06-28ZOTELLI, Maiara. Síntese e caracterização de partículas Janus (Si-Au). 2021. Trabalho de Conclusão de Curso (Graduação em Engenharia Química) – Universidade Federal de São Carlos, São Carlos, 2021. Disponível em: https://repositorio.ufscar.br/handle/ufscar/15767.https://repositorio.ufscar.br/handle/ufscar/15767Janus are colloidal particles with more than a single type of chemistry or surface composition, and can be of diferent sizes and shapes. Their anisotropic structure (diferent characteristics in diferent directions) allows them to present multifunctional properties in the same particle, such as optical, chemical and magnetic properties, leading to several application opportunities, such as in industry and biomedicine. The purpose of this work was to develop a literature review on the main methodologies used to synthesize Janus particles, and also their main assembly properties in nanometric structures. In addition, it aimed to develop a methodology for the synthesis of Janus silica and gold (Si-Au) particles, using a Pickering emulsion with parafin and silica particles, followed by a process of functionalization of these particles exposed surfaces. Both silica and gold particles were obtained by chemical reaction. The silica particles were characterized in the equipment Scanning Mobility Particle Sizer (SMPS) and was obtained an average aerodynamic diameter of 25.85 +/- 1.57 nm, while the gold particles were characterized by spectrophotometry and was obtained an average diameter of 16.61 +/- 0.33 nm. The parafin solution with silica particles was observed under an optical microscope and it was possible to visualize micrometric droplets of the Pickering solution and, subsequently, the solution without the parafin and with the addition of gold after the functionalization of the silica particles was observed. The characterizations were not performed by SEM due to the current pandemic situation, however, such particles will be characterized in the future, and the results showed the attainment of Janus Si-Au particles. Although the application of Janus particles is not within the scope of this work, the methodology presented allows synthesizing such particles in large laboratory quantities, in the gram scale, and can be easily replicated and could also come to be scaled-up at an industrial level. Janus Si-Au particles have several application potentials, such as surfactants in oil-water emulsions, and many others in biomedicine and agriculture.Janus são partículas coloidais com mais de um único tipo de química ou composição de superfície, e podem ser de diversos tamanhos e formatos. A sua estrutura anisotrópica (características distintas em diferentes direções) permite que elas apresentem propriedades multifuncionais em uma mesma partícula, como propriedades ópticas, químicas e magnéticas, trazendo diversas oportunidades de aplicações, como na indústria e na biomedicina. O objetivo do presente trabalho foi desenvolver uma revisão bibliográfica sobre as principais metodologias utilizadas para sintetizar partículas Janus, e também suas principais propriedades de agrupamento em estruturas nanométricas. Além disso, teve como objetivo desenvolver uma metodologia para a síntese de partículas Janus sílica e ouro (Si-Au), por meio de emulsão Pickering com parafina e partículas de sílica, seguida de um processo de funcionalização da superfície exposta destas partículas. Tanto as partículas de sílica quanto de ouro foram obtidas por meio de reação química. As partículas de sílica foram caracterizadas no equipamento Scanning Mobility Particle Sizer (SMPS) e apresentaram diâmetro aerodinâmico médio de 25,85 +/- 1,57 nm, enquanto que as partículas de ouro foram caracterizadas por espectrofotometria e apresentaram diâmetro médio de 16,61 +/- 0,33 nm. A soluçãao de parafina com partículas de sílica foi observada no microscópio óptico e foi possível visualizar as gotículas micrométricas da emulsão Pickering e, posteriormente, observou-se a solução sem a parafina e com a adição de ouro após a funcionalização parcial da superfície das partículas de sílica. As caracterizações por MEV não foram realizadas por conta do contexto atual de pandemia, no entanto, tais partículas serão caracterizadas futuramente, e os resultados obtidos evidenciaram a obtenção de partículas Janus Si-Au. Apesar de a aplicação destas partículas estar fora do escopo do presente trabalho, a metodologia apresentada permite sintetizar tais partículas em grandes quantidades laboratoriais, na escala de gramas, e pode ser facilmente replicada, podendo também vir a ser ampliada para escalas industriais. Partículas Janus Si-Au possuem diversos potenciais de aplicação, tais como surfactantes em emulsões óleo-água, e diversas outras na biomedicina e agricultura.Não recebi financiamentoporUniversidade Federal de São CarlosCâmpus São CarlosEngenharia Química - EQUFSCarAttribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessPartícula janusNanopartículasSínteseSílicaOuroENGENHARIAS::ENGENHARIA QUIMICA::TECNOLOGIA QUIMICASíntese e caracterização de partículas Janus (Si-Au)Synthesis and characterization of Janus particles (Si-Au)info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/bachelorThesis6006005fdc0b6c-5b77-4308-8267-c2d4e5e00c4dreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALTG_Maiara-Zotelli+aprovação.pdfTG_Maiara-Zotelli+aprovação.pdfTexto aprovado e revisado do trabalho de graduaçãoapplication/pdf38421241https://repositorio.ufscar.br/bitstream/ufscar/15767/1/TG_Maiara-Zotelli%2baprova%c3%a7%c3%a3o.pdf13c8c0f650f698df9e2ae6068770abf8MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8811https://repositorio.ufscar.br/bitstream/ufscar/15767/2/license_rdfe39d27027a6cc9cb039ad269a5db8e34MD52TEXTTG_Maiara-Zotelli+aprovação.pdf.txtTG_Maiara-Zotelli+aprovação.pdf.txtExtracted texttext/plain90368https://repositorio.ufscar.br/bitstream/ufscar/15767/3/TG_Maiara-Zotelli%2baprova%c3%a7%c3%a3o.pdf.txtcb449f2f2629201b897989ac6d84166bMD53THUMBNAILTG_Maiara-Zotelli+aprovação.pdf.jpgTG_Maiara-Zotelli+aprovação.pdf.jpgIM Thumbnailimage/jpeg5707https://repositorio.ufscar.br/bitstream/ufscar/15767/4/TG_Maiara-Zotelli%2baprova%c3%a7%c3%a3o.pdf.jpgad899941c332aaa7f971f721ba108b59MD54ufscar/157672023-09-18 18:32:32.016oai:repositorio.ufscar.br:ufscar/15767Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:32:32Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false
dc.title.por.fl_str_mv Síntese e caracterização de partículas Janus (Si-Au)
dc.title.alternative.eng.fl_str_mv Synthesis and characterization of Janus particles (Si-Au)
title Síntese e caracterização de partículas Janus (Si-Au)
spellingShingle Síntese e caracterização de partículas Janus (Si-Au)
Zotelli, Maiara
Partícula janus
Nanopartículas
Síntese
Sílica
Ouro
ENGENHARIAS::ENGENHARIA QUIMICA::TECNOLOGIA QUIMICA
title_short Síntese e caracterização de partículas Janus (Si-Au)
title_full Síntese e caracterização de partículas Janus (Si-Au)
title_fullStr Síntese e caracterização de partículas Janus (Si-Au)
title_full_unstemmed Síntese e caracterização de partículas Janus (Si-Au)
title_sort Síntese e caracterização de partículas Janus (Si-Au)
author Zotelli, Maiara
author_facet Zotelli, Maiara
author_role author
dc.contributor.authorlattes.por.fl_str_mv http://lattes.cnpq.br/6244585450324868
dc.contributor.author.fl_str_mv Zotelli, Maiara
dc.contributor.advisor1.fl_str_mv Bernardo, André
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/5705402824877708
dc.contributor.advisor-co1.fl_str_mv Machry, Karine
dc.contributor.advisor-co1Lattes.fl_str_mv http://lattes.cnpq.br/8863820504316400
dc.contributor.authorID.fl_str_mv 0e236f04-e59c-4081-af0f-4c54e16d5379
contributor_str_mv Bernardo, André
Machry, Karine
dc.subject.por.fl_str_mv Partícula janus
Nanopartículas
Síntese
Sílica
Ouro
topic Partícula janus
Nanopartículas
Síntese
Sílica
Ouro
ENGENHARIAS::ENGENHARIA QUIMICA::TECNOLOGIA QUIMICA
dc.subject.cnpq.fl_str_mv ENGENHARIAS::ENGENHARIA QUIMICA::TECNOLOGIA QUIMICA
description Janus are colloidal particles with more than a single type of chemistry or surface composition, and can be of diferent sizes and shapes. Their anisotropic structure (diferent characteristics in diferent directions) allows them to present multifunctional properties in the same particle, such as optical, chemical and magnetic properties, leading to several application opportunities, such as in industry and biomedicine. The purpose of this work was to develop a literature review on the main methodologies used to synthesize Janus particles, and also their main assembly properties in nanometric structures. In addition, it aimed to develop a methodology for the synthesis of Janus silica and gold (Si-Au) particles, using a Pickering emulsion with parafin and silica particles, followed by a process of functionalization of these particles exposed surfaces. Both silica and gold particles were obtained by chemical reaction. The silica particles were characterized in the equipment Scanning Mobility Particle Sizer (SMPS) and was obtained an average aerodynamic diameter of 25.85 +/- 1.57 nm, while the gold particles were characterized by spectrophotometry and was obtained an average diameter of 16.61 +/- 0.33 nm. The parafin solution with silica particles was observed under an optical microscope and it was possible to visualize micrometric droplets of the Pickering solution and, subsequently, the solution without the parafin and with the addition of gold after the functionalization of the silica particles was observed. The characterizations were not performed by SEM due to the current pandemic situation, however, such particles will be characterized in the future, and the results showed the attainment of Janus Si-Au particles. Although the application of Janus particles is not within the scope of this work, the methodology presented allows synthesizing such particles in large laboratory quantities, in the gram scale, and can be easily replicated and could also come to be scaled-up at an industrial level. Janus Si-Au particles have several application potentials, such as surfactants in oil-water emulsions, and many others in biomedicine and agriculture.
publishDate 2021
dc.date.issued.fl_str_mv 2021-06-28
dc.date.accessioned.fl_str_mv 2022-03-28T20:13:10Z
dc.date.available.fl_str_mv 2022-03-28T20:13:10Z
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dc.identifier.citation.fl_str_mv ZOTELLI, Maiara. Síntese e caracterização de partículas Janus (Si-Au). 2021. Trabalho de Conclusão de Curso (Graduação em Engenharia Química) – Universidade Federal de São Carlos, São Carlos, 2021. Disponível em: https://repositorio.ufscar.br/handle/ufscar/15767.
dc.identifier.uri.fl_str_mv https://repositorio.ufscar.br/handle/ufscar/15767
identifier_str_mv ZOTELLI, Maiara. Síntese e caracterização de partículas Janus (Si-Au). 2021. Trabalho de Conclusão de Curso (Graduação em Engenharia Química) – Universidade Federal de São Carlos, São Carlos, 2021. Disponível em: https://repositorio.ufscar.br/handle/ufscar/15767.
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dc.rights.driver.fl_str_mv Attribution-NonCommercial-NoDerivs 3.0 Brazil
http://creativecommons.org/licenses/by-nc-nd/3.0/br/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivs 3.0 Brazil
http://creativecommons.org/licenses/by-nc-nd/3.0/br/
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dc.publisher.none.fl_str_mv Universidade Federal de São Carlos
Câmpus São Carlos
Engenharia Química - EQ
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publisher.none.fl_str_mv Universidade Federal de São Carlos
Câmpus São Carlos
Engenharia Química - EQ
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