Gelation of Cellulose Derivatives: Searching for ionic liquid paper

Detalhes bibliográficos
Autor(a) principal: Rosete, Inês M. Micael
Data de Publicação: 2016
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10362/25151
Resumo: Cellulose is the world’s most abundant, biocompatible, non-toxic, biodegradable polymer obtained from renewable sources. However its dissolution problems hampers a more generalized application. ILs are generally defined as organic/inorganic salts with a melting point lower than 100 C which present a good solubility for polar and non-polar compounds such as organic, inorganic or polymeric materials like cellulose. Cellulose solvents are scarce and, as such, the modification of its properties is a challenge. In this dissertation the main goal was to combine some of the unique IL’s properties with the intrinsic cellulose features. Thus, our strategy was to synthesize cellulose derivatives that enable the dissolution process in order to, later on, obtain a polymer gel. In the first stage we obtained ionic liquid grafted cellulose derivatives. Afterwards, we performed an extensive solubilization study to select the appropriate conditions to obtain the gel state. To further understand the solvents’ dynamics and their relevance in the gelation process, these conditions were followed by NMR and Rheology. The obtained results allowed the proposal of a gelation model for these cellulosic polymers. The proposed strategy could be a starting point to design and produce Ionic Liquid Paper (ILP), a material that could have potential for electrochemical applications.
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spelling Gelation of Cellulose Derivatives: Searching for ionic liquid paperCelluloseCellulose derivativespolymer ionic liquidGelsNuclear Magnetic ResonanceRheologyDomínio/Área Científica::Engenharia e Tecnologia::Engenharia QuímicaCellulose is the world’s most abundant, biocompatible, non-toxic, biodegradable polymer obtained from renewable sources. However its dissolution problems hampers a more generalized application. ILs are generally defined as organic/inorganic salts with a melting point lower than 100 C which present a good solubility for polar and non-polar compounds such as organic, inorganic or polymeric materials like cellulose. Cellulose solvents are scarce and, as such, the modification of its properties is a challenge. In this dissertation the main goal was to combine some of the unique IL’s properties with the intrinsic cellulose features. Thus, our strategy was to synthesize cellulose derivatives that enable the dissolution process in order to, later on, obtain a polymer gel. In the first stage we obtained ionic liquid grafted cellulose derivatives. Afterwards, we performed an extensive solubilization study to select the appropriate conditions to obtain the gel state. To further understand the solvents’ dynamics and their relevance in the gelation process, these conditions were followed by NMR and Rheology. The obtained results allowed the proposal of a gelation model for these cellulosic polymers. The proposed strategy could be a starting point to design and produce Ionic Liquid Paper (ILP), a material that could have potential for electrochemical applications.Corvo, MartaEcheverria, CoroRUNRosete, Inês M. Micael2019-12-30T01:30:45Z2016-092017-112016-09-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10362/25151enginfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T04:13:11Zoai:run.unl.pt:10362/25151Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:28:12.992532Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Gelation of Cellulose Derivatives: Searching for ionic liquid paper
title Gelation of Cellulose Derivatives: Searching for ionic liquid paper
spellingShingle Gelation of Cellulose Derivatives: Searching for ionic liquid paper
Rosete, Inês M. Micael
Cellulose
Cellulose derivatives
polymer ionic liquid
Gels
Nuclear Magnetic Resonance
Rheology
Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Química
title_short Gelation of Cellulose Derivatives: Searching for ionic liquid paper
title_full Gelation of Cellulose Derivatives: Searching for ionic liquid paper
title_fullStr Gelation of Cellulose Derivatives: Searching for ionic liquid paper
title_full_unstemmed Gelation of Cellulose Derivatives: Searching for ionic liquid paper
title_sort Gelation of Cellulose Derivatives: Searching for ionic liquid paper
author Rosete, Inês M. Micael
author_facet Rosete, Inês M. Micael
author_role author
dc.contributor.none.fl_str_mv Corvo, Marta
Echeverria, Coro
RUN
dc.contributor.author.fl_str_mv Rosete, Inês M. Micael
dc.subject.por.fl_str_mv Cellulose
Cellulose derivatives
polymer ionic liquid
Gels
Nuclear Magnetic Resonance
Rheology
Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Química
topic Cellulose
Cellulose derivatives
polymer ionic liquid
Gels
Nuclear Magnetic Resonance
Rheology
Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Química
description Cellulose is the world’s most abundant, biocompatible, non-toxic, biodegradable polymer obtained from renewable sources. However its dissolution problems hampers a more generalized application. ILs are generally defined as organic/inorganic salts with a melting point lower than 100 C which present a good solubility for polar and non-polar compounds such as organic, inorganic or polymeric materials like cellulose. Cellulose solvents are scarce and, as such, the modification of its properties is a challenge. In this dissertation the main goal was to combine some of the unique IL’s properties with the intrinsic cellulose features. Thus, our strategy was to synthesize cellulose derivatives that enable the dissolution process in order to, later on, obtain a polymer gel. In the first stage we obtained ionic liquid grafted cellulose derivatives. Afterwards, we performed an extensive solubilization study to select the appropriate conditions to obtain the gel state. To further understand the solvents’ dynamics and their relevance in the gelation process, these conditions were followed by NMR and Rheology. The obtained results allowed the proposal of a gelation model for these cellulosic polymers. The proposed strategy could be a starting point to design and produce Ionic Liquid Paper (ILP), a material that could have potential for electrochemical applications.
publishDate 2016
dc.date.none.fl_str_mv 2016-09
2016-09-01T00:00:00Z
2017-11
2019-12-30T01:30:45Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10362/25151
url http://hdl.handle.net/10362/25151
dc.language.iso.fl_str_mv eng
language eng
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dc.format.none.fl_str_mv application/pdf
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instacron:RCAAP
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