High performance free-standing films by layer-by-layer assembly of graphene flakes and ribbons with natural polymers
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/43832 |
Resumo: | In this work, novel free-standing (FS) films based on chitosan, alginate and graphene oxide (GO) were developed through layer-by-layer assembly. First, GO was synthesized from graphite and multi-walled carbon nanotubes using a modified Hummer's method, yielding oxidized graphene flakes (o-GFs) and oxidized graphene nanoribbons (o-GNRs), respectively, which were then characterized. Then FS films were produced and their morphological, thermal and mechanical properties, as well as the o-GF and o-GNR dispersion along the films were assessed. Their degradation and swelling profiles as well as their biological behavior were evaluated. Graphite and nanotubes were successfully oxidized and exfoliated forming stable suspensions that could be combined with chitosan (CHI) and alginate (ALG) solutions by layer-by-layer processing. The addition of o-GFs and o-GNRs resulted in rougher, hydrophilic FS films with significantly improved mechanical properties relative to CHI/ALG films. The presence of o-GFs or o-GNRs did not affect the thermal stability and the addition of o-GFs resulted in films with enhanced cytocompatibility. The results demonstrate the high potential of the GO reinforced films for biomedical applications, in particular o-GF films, for wound healing, and cardiac and bone engineering applications. |
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High performance free-standing films by layer-by-layer assembly of graphene flakes and ribbons with natural polymersGrapheneHigh performance free-standing filmsLayer-by-layer assemblyNatural polymersScience & TechnologyIn this work, novel free-standing (FS) films based on chitosan, alginate and graphene oxide (GO) were developed through layer-by-layer assembly. First, GO was synthesized from graphite and multi-walled carbon nanotubes using a modified Hummer's method, yielding oxidized graphene flakes (o-GFs) and oxidized graphene nanoribbons (o-GNRs), respectively, which were then characterized. Then FS films were produced and their morphological, thermal and mechanical properties, as well as the o-GF and o-GNR dispersion along the films were assessed. Their degradation and swelling profiles as well as their biological behavior were evaluated. Graphite and nanotubes were successfully oxidized and exfoliated forming stable suspensions that could be combined with chitosan (CHI) and alginate (ALG) solutions by layer-by-layer processing. The addition of o-GFs and o-GNRs resulted in rougher, hydrophilic FS films with significantly improved mechanical properties relative to CHI/ALG films. The presence of o-GFs or o-GNRs did not affect the thermal stability and the addition of o-GFs resulted in films with enhanced cytocompatibility. The results demonstrate the high potential of the GO reinforced films for biomedical applications, in particular o-GF films, for wound healing, and cardiac and bone engineering applications.The authors acknowledge the Portuguese Foundation for Science and Technology (FCT) and the European program FEDER/ COMPETE for the financial support through project BioSeaGlue: EXPL/CTM-BIO/0646/2013 (FCOMP-01-0124-FEDER-041105) and for project PEst-C/CTM/LA0025/2013 (Strategic Project – LA 25 – 2013-2014). This work was also financially supported by FCT through the scholarships SFRH/BPD/96797/2013 granted to Sofia G. Caridade, SFRH/BD/97606/2013 granted to Maria Sousa, and SFRH/BD/87214/2012 granted to Eunice Cunha.Royal Society of ChemistryUniversidade do MinhoMoura, Duarte Alexandre Campos SerraCaridade, S. G.Sousa, M. P.Cunha, E.Rocha, HelenaMano, J. F.Paiva, M. C.Alves, N. M.2016-112016-11-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/43832engMoura D., Caridade S. G., Sousa M. P., Cunha E., Mano J. F., Paiva M. C., Alves N. M. High performance free-standing films by layer-by-layer assembly of graphene flakes and ribbons with natural polymers, Journal Of Materials Chemistry B, Vol. 4, Issue 47, pp. 7718-7730, doi:10.1039/C6TB02344D, 20162050-750X10.1039/C6TB02344Dhttp://dx.doi.org/10.1039/C6TB02344Dinfo: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:RCAAP2023-07-21T12:22:17Zoai:repositorium.sdum.uminho.pt:1822/43832Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:15:44.946265Repositório 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 |
High performance free-standing films by layer-by-layer assembly of graphene flakes and ribbons with natural polymers |
title |
High performance free-standing films by layer-by-layer assembly of graphene flakes and ribbons with natural polymers |
spellingShingle |
High performance free-standing films by layer-by-layer assembly of graphene flakes and ribbons with natural polymers Moura, Duarte Alexandre Campos Serra Graphene High performance free-standing films Layer-by-layer assembly Natural polymers Science & Technology |
title_short |
High performance free-standing films by layer-by-layer assembly of graphene flakes and ribbons with natural polymers |
title_full |
High performance free-standing films by layer-by-layer assembly of graphene flakes and ribbons with natural polymers |
title_fullStr |
High performance free-standing films by layer-by-layer assembly of graphene flakes and ribbons with natural polymers |
title_full_unstemmed |
High performance free-standing films by layer-by-layer assembly of graphene flakes and ribbons with natural polymers |
title_sort |
High performance free-standing films by layer-by-layer assembly of graphene flakes and ribbons with natural polymers |
author |
Moura, Duarte Alexandre Campos Serra |
author_facet |
Moura, Duarte Alexandre Campos Serra Caridade, S. G. Sousa, M. P. Cunha, E. Rocha, Helena Mano, J. F. Paiva, M. C. Alves, N. M. |
author_role |
author |
author2 |
Caridade, S. G. Sousa, M. P. Cunha, E. Rocha, Helena Mano, J. F. Paiva, M. C. Alves, N. M. |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Moura, Duarte Alexandre Campos Serra Caridade, S. G. Sousa, M. P. Cunha, E. Rocha, Helena Mano, J. F. Paiva, M. C. Alves, N. M. |
dc.subject.por.fl_str_mv |
Graphene High performance free-standing films Layer-by-layer assembly Natural polymers Science & Technology |
topic |
Graphene High performance free-standing films Layer-by-layer assembly Natural polymers Science & Technology |
description |
In this work, novel free-standing (FS) films based on chitosan, alginate and graphene oxide (GO) were developed through layer-by-layer assembly. First, GO was synthesized from graphite and multi-walled carbon nanotubes using a modified Hummer's method, yielding oxidized graphene flakes (o-GFs) and oxidized graphene nanoribbons (o-GNRs), respectively, which were then characterized. Then FS films were produced and their morphological, thermal and mechanical properties, as well as the o-GF and o-GNR dispersion along the films were assessed. Their degradation and swelling profiles as well as their biological behavior were evaluated. Graphite and nanotubes were successfully oxidized and exfoliated forming stable suspensions that could be combined with chitosan (CHI) and alginate (ALG) solutions by layer-by-layer processing. The addition of o-GFs and o-GNRs resulted in rougher, hydrophilic FS films with significantly improved mechanical properties relative to CHI/ALG films. The presence of o-GFs or o-GNRs did not affect the thermal stability and the addition of o-GFs resulted in films with enhanced cytocompatibility. The results demonstrate the high potential of the GO reinforced films for biomedical applications, in particular o-GF films, for wound healing, and cardiac and bone engineering applications. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-11 2016-11-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/1822/43832 |
url |
http://hdl.handle.net/1822/43832 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Moura D., Caridade S. G., Sousa M. P., Cunha E., Mano J. F., Paiva M. C., Alves N. M. High performance free-standing films by layer-by-layer assembly of graphene flakes and ribbons with natural polymers, Journal Of Materials Chemistry B, Vol. 4, Issue 47, pp. 7718-7730, doi:10.1039/C6TB02344D, 2016 2050-750X 10.1039/C6TB02344D http://dx.doi.org/10.1039/C6TB02344D |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Royal Society of Chemistry |
publisher.none.fl_str_mv |
Royal Society of Chemistry |
dc.source.none.fl_str_mv |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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