Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/61006

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dc.contributor.authorSilva, Iris O.por
dc.contributor.authorLadchumananandasivam, Rasiahpor
dc.contributor.authorNascimento, José Heriberto O.por
dc.contributor.authorSilva, Késia Karina O. S.por
dc.contributor.authorOliveira, Fernando R.por
dc.contributor.authorSouto, A. Pedropor
dc.contributor.authorFelgueiras, Helena Pradopor
dc.contributor.authorZille, Andreapor
dc.date.accessioned2019-07-25T08:41:31Z-
dc.date.available2019-07-25T08:41:31Z-
dc.date.issued2019-
dc.identifier.urihttp://hdl.handle.net/1822/61006-
dc.description.abstractGold nanoparticles (AuNPs), chemically synthesized by citrate reduction, were for the first time immobilized onto chitosan‐treated soybean knitted fabric via exhaustion method. AuNPs were successfully produced in the form of highly spherical, moderated polydisperse, stable structures. Their average size was estimated at ≈35 nm. Successful immobilization of chitosan and AuNPs were confirmed by alterations in the fabric’s spectrophotometric reflectance spectrum and by detection of nitrogen and gold, non‐conjugated C=O stretching vibrations of carbonyl functional groups and residual N‐acetyl groups characteristic bands by X‐ray photoelectron spectroscopy (XPS) and Fourier‐Transform Infrared Spectroscopy (FTIR) analysis. XPS analysis confirms the strong binding of AuNPs on the chitosan matrix. The fabrics’ thermal stability increased with the introduction of both chitosan and AuNPs. Coated fabrics revealed an ultraviolet protection factor (UPF) of +50, which established their effectiveness in ultraviolet (UV) radiation shielding. They were also found to resist up to 5 washing cycles with low loss of immobilized AuNPs. Compared with AuNPs or chitosan alone, the combined functionalized coating on soy fabrics demonstrated an improved antimicrobial effect by reducing Staphylococcus aureus adhesion (99.94%) and Escherichia coli (96.26%). Overall, the engineered fabrics were confirmed as multifunctional, displaying attractive optical properties, UV‐light protection and important antimicrobial features, that increase their interest for potential biomedical applications.por
dc.description.sponsorship: This research was funded by FEDER funds through the Operational Competitiveness Program – COMPETE and by National Funds through Fundação para a Ciência e Tecnologia (FCT) under the project POCI‐ 01‐0145‐FEDER‐007136 and UID/CTM/00264/2019. A. Zille also acknowledges financial support of the FCT through an Investigator FCT Research contract (IF/00071/2015) and the project PTDC/CTM‐TEX/28295/2017 financed by FCT, FEDER and POCI. This work was funded by FEDER funds through the Operational Competitiveness Program – COMPETE and by National Funds through Fundação para a Ciência e Tecnologia (FCT)—under the project POCI‐01‐0145‐FEDER‐007136 and UID/CTM/00264/2019. A. Zille also acknowledges financial support of the FCT through an Investigator FCT Research contract (IF/00071/2015) and the project PTDC/CTM‐ TEX/28295/2017 financed by FCT, FEDER and POCI.por
dc.language.isoengpor
dc.publisherMDPIpor
dc.rightsopenAccesspor
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/por
dc.subjectMultifunctional textilespor
dc.subjectBiodegradable soybean fibrespor
dc.subjectChitosanpor
dc.subjectGold nanoparticlespor
dc.subjectUV‐light protectionpor
dc.subjectAntimicrobialpor
dc.titleMultifunctional chitosan/gold nanoparticles coatings for biomedical textilespor
dc.typearticlepor
dc.peerreviewedyespor
oaire.citationStartPage1064por
oaire.citationIssue8por
oaire.citationVolume9por
dc.identifier.doi10.3390/nano9081064por
dc.subject.fosEngenharia e Tecnologia::Engenharia dos Materiaispor
dc.subject.fosEngenharia e Tecnologia::Nanotecnologiapor
dc.subject.wosScience & Technologypor
sdum.journalNanomaterialspor
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