Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/43832

TitleHigh performance free-standing films by layer-by-layer assembly of graphene flakes and ribbons with natural polymers
Author(s)Moura, Duarte Alexandre Campos Serra
Caridade, S. G.
Sousa, M. P.
Cunha, E.
Rocha, Helena
Mano, J. F.
Paiva, M. C.
Alves, N. M.
KeywordsGraphene
High performance free-standing films
Layer-by-layer assembly
Natural polymers
Issue dateNov-2016
PublisherThe Royal Society of Chemistry
JournalJournal of Materials Chemistry B
CitationMoura 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
Abstract(s)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.
Typearticle
URIhttp://hdl.handle.net/1822/43832
DOI10.1039/C6TB02344D
ISSN2050-750X
Publisher versionhttp://dx.doi.org/10.1039/C6TB02344D
Peer-Reviewedyes
AccessopenAccess
Appears in Collections:IPC - Artigos em revistas científicas internacionais com arbitragem
3B’s - Artigos em revistas/Papers in scientific journals

Files in This Item:
File Description SizeFormat 
18925-JMaterChemB4_7718_16.pdf3,73 MBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu Currículo DeGóis