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Effect of preparation and processing conditions on UV absorbing properties of hydroxyapatite-Fe2O3 sunscreen

2017Journal article Restricted access
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dc.contributor.authorTeixeira, M. A. C.
dc.contributor.authorPiccirillo, C.
dc.contributor.authorTobaldi, D. M.
dc.contributor.authorPullar, R. C.
dc.contributor.authorLabrincha, J. A.
dc.contributor.authorFerreira, M. O.
dc.contributor.authorCastro, Paula M. L.
dc.contributor.authorPintado, M. M. E.
dc.date.accessioned2017-10-17T09:36:57Z
dc.date.available2017-10-17T09:36:57Z
dc.date.issued2017
dc.description.abstractThe development of innovative, safe and non-photocatalytic sunscreens is urgently needed, as it is essential to have sunscreen filters offering appropriate UV protection without damaging the environment and/or generating free radicals when in contact with the skin. Hydroxyapatite (Ca-10(PO4)(6)(OH)(2), HAp) when substituted with iron has UV protection properties and is not photocatalytic; HAp was used to make a sunscreen filter by treating cod fish bones in an iron-containing solution, and then calcining them at 700 degrees C. Here we present a systematic and advanced study on this material, to obtain a sunscreen with improved UV absorbing properties, Bones were treated with three different iron salts - Fe(II) chloride, Fe(II) lactate and Fe(III) nitrate - under various pH conditions. Results showed that Fe(II) chloride in basic pH led to the most effective iron inclusion, High energy ball milling or ultrasound were investigated to increase surface area and corresponding UV absorption; high energy ball milling treatment led to the best optical properties. The optimum powders were used to formulate UV protection creams, which showed Sun Protection Factor (SPF) values significantly superior to the control cream (up to 4.1). Moreover the critical wavelength (lambda(crit)) was >370 nm (388-389 nm) and UVA/UVB ratios were very close to 1. With these properties these sunscreens can be classified as broad UV protectors. Results also showed that combining these powders with other sunscreens (i.e. titanium dioxide), a synergic effect between the different components was also observed. This investigation showed that HAp-based sunscreens of marine origin are a valid alternative to commercial products, safe for the health of the customers and, being non-photocatalytic, do not pose a threat to the environment.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationTEIXEIRA, M. A. C.; PICCIRILLO, C.; TOBALDI, D.M.; PULLAR, R.C.; LABRINCHA, J.A.; FERREIRA, M.O.; CASTRO, PAULA M. L.; PINTADO, M. E. - Effect of preparation and processing conditions on UV absorbing properties of hydroxyapatite-Fe2O3 sunscreen. Materials Science and Engineering: C. ISSN 928-4931. Vol. 71 (2017), p. 141–149pt_PT
dc.identifier.doi10.1016/j.msec.2016.09.065pt_PT
dc.identifier.eid84990209061
dc.identifier.eissn1873-0191
dc.identifier.issn0928-4931
dc.identifier.pmid27987691
dc.identifier.urihttp://hdl.handle.net/10400.14/23137
dc.identifier.wos000390967200018
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevier
dc.relationENVIRONMENTALLY SUSTAINABLE CERAMICS FOR APPLICATIONS AS MULTIFUNCTIONAL PHOTOCATALYST
dc.subjectSunscreenpt_PT
dc.subjectHydroxyapatitept_PT
dc.subjectIron oxidept_PT
dc.subjectSun protection factorpt_PT
dc.subjectCritical wavelengthpt_PT
dc.subjectUVA/UVBpt_PT
dc.titleEffect of preparation and processing conditions on UV absorbing properties of hydroxyapatite-Fe2O3 sunscreenpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleENVIRONMENTALLY SUSTAINABLE CERAMICS FOR APPLICATIONS AS MULTIFUNCTIONAL PHOTOCATALYST
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FCTM%2F50011%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F86483%2F2012/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/FARH/SFRH%2FBPD%2F97115%2F2013/PT
oaire.citation.endPage149
oaire.citation.startPage141
oaire.citation.titleMaterials Science and Engineering: Cpt_PT
oaire.citation.volume71
oaire.fundingStream5876
oaire.fundingStreamSFRH
oaire.fundingStreamFARH
person.familyNamePiccirillo
person.familyNameTobaldi
person.familyNamePullar
person.familyNameLabrincha
person.familyNameFerreira
person.familyNameCastro
person.familyNamePintado
person.givenNameClara
person.givenNameDavid Maria
person.givenNameRobert
person.givenNameJoao
person.givenNameMaria Teresa
person.givenNamePaula
person.givenNameMaria Manuela
person.identifier962551
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person.identifier.ciencia-id2F13-AAE0-3405
person.identifier.orcid0000-0002-6339-716X
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person.identifier.orcid0000-0001-6844-4482
person.identifier.orcid0000-0003-4782-1685
person.identifier.orcid0000-0002-8446-5600
person.identifier.orcid0000-0001-8841-6606
person.identifier.orcid0000-0002-0760-3184
person.identifier.ridN-8206-2013
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project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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