Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/64578

TitleSpin-coated polysaccharide-based multilayered freestanding films with adhesive and bioactive moieties
Author(s)Moreira, Joana
Vale, A. Catarina
Pires, R. A.
Botelho, Gabriela
Reis, R. L.
Alves, N. M.
Keywordslayer-by-layer
spin-coating
freestanding films
catechol-modified polymers
nacre-inspired
nanocomposite
Issue date14-Feb-2020
PublisherMultidisciplinary Digital Publishing Institute
JournalMolecules
CitationMoreira, J.; Vale, A.C.; A. Pires, R.; Botelho, G.; Reis, R.L.; Alves, N.M. Spin-Coated Polysaccharide-Based Multilayered Freestanding Films with Adhesive and Bioactive Moieties. Molecules 2020, 25, 840.
Abstract(s)Freestanding films based on catechol functionalized chitosan (CHI), hyaluronic acid (HA), and bioglass nanoparticles (BGNPs) were developed by spin-coating layer-by-layer assembly (SA-LbL). The catechol groups of 3,4-dihydroxy-<span style="font-variant: small-caps;">l</span>-phenylalanine (DOPA) present in the marine mussels adhesive proteins (MAPs) are the main factors responsible for their characteristic strong wet adhesion. Then, the produced films were cross-linked with genipin to improve their stability in wet state. Overall, the incorporation of BGNPs resulted in thicker and bioactive films, hydrophilic and rougher surfaces, reduced swelling, higher weight loss, and lower stiffness. The incorporation of catechol groups onto the films showed a significant increase in the films’ adhesion and stiffness, lower swelling, and weight loss. Interestingly, a synergetic effect on the stiffness increase was observed upon the combined incorporation of BGNPs with catechol-modified polymers, given that such films were the stiffest. Regarding the biological assays, the films exhibited no negative effects on cellular viability, adhesion, and proliferation, and the BGNPs seemed to promote higher cellular metabolic activity. These bioactive LbL freestanding films combine enhanced adhesion with improved mechanical properties and could find applications in the biomedical field, such as guided hard tissue regeneration membranes.
TypeArticle
URIhttp://hdl.handle.net/1822/64578
DOI10.3390/molecules25040840
e-ISSN1420-3049
Publisher versionhttps://www.mdpi.com/1420-3049/25/4/840
Peer-Reviewedyes
AccessOpen access
Appears in Collections:3B’s - Artigos em revistas/Papers in scientific journals
CDQuim - Artigos (Papers)

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