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dc.contributor.CRUESPUNIVERSIDADE ESTADUAL DE CAMPINASpt_BR
dc.contributor.authorunicampLanders, Richard-
dc.typeArtigopt_BR
dc.titleEffects of cold SF6 plasma treatment on a-C:H, polypropylene and polystyrenept_BR
dc.contributor.authorAmorim, M.K.M.-
dc.contributor.authorRangel, E.C.-
dc.contributor.authorLanders, R.-
dc.contributor.authorDurrant, S.F.-
dc.subjectPolímerospt_BR
dc.subject.otherlanguagePolymerspt_BR
dc.description.abstractThe effects of cold SF6 plasma treatment on amorphous hydrogenated carbon (FA), polypropylene (PP) and polystyrene (PS) were investigated as functions of gas pressure and applied power. An anticipated increase in hydrophobicity was confirmed by the greater water contact angles, θ, observed after all the treatments. Under the best conditions θ was increased by 50.8°, 57.2° and 21°, respectively. A rise and fall in θ was observed as the pressure of SF6 was increased, this trend being most consistent for FA. Although the plasma treatments caused some changes in surface roughness, measured using profilometry, there were no clear correlations between this parameter and θ. As revealed by Energy Dispersive X-ray Spectroscopy (EDS) and X-ray Photoelectron Spectroscopy (XPS), the treated surfaces were fluorinated. As the degree of fluorination under optimal conditions was 2.2 at.%, 10.4 at.% and 36.3 at.% for the FA, PP and PS, respectively, this factor was not alone responsible for the observed increases in θ. Sulfur was attached to the surface of all the treated samples. The relative surface carbon content was reduced by the treatments. The main causes of the changes in θ upon treatment were the induced compositional and structural changes. Ageing for ten days caused a typical decrease in θ of ~10°, probably caused by rotation of hydrophobic surface groups into the surfacept_BR
dc.relation.ispartofSurface and coatings technologypt_BR
dc.relation.ispartofabbreviationSurf. coat. tech.pt_BR
dc.publisher.cityLausannept_BR
dc.publisher.countrySuiçapt_BR
dc.publisherElsevierpt_BR
dc.date.issued2020-
dc.date.monthofcirculationMar.pt_BR
dc.language.isoengpt_BR
dc.description.volume385pt_BR
dc.rightsFechadopt_BR
dc.sourceSCOPUSpt_BR
dc.identifier.issn0257-8972pt_BR
dc.identifier.eissn1879-3347pt_BR
dc.identifier.doi10.1016/j.surfcoat.2020.125398pt_BR
dc.identifier.urlhttps://www.sciencedirect.com/science/article/abs/pii/S0257897220300670pt_BR
dc.description.sponsorshipCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQpt_BR
dc.description.sponsorshipCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESpt_BR
dc.description.sponsorshipFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESPpt_BR
dc.description.sponsordocumentnumbersem informaçãopt_BR
dc.description.sponsordocumentnumbersem informaçãopt_BR
dc.description.sponsordocumentnumber2017/15853-0pt_BR
dc.date.available2020-05-28T15:40:46Z-
dc.date.accessioned2020-05-28T15:40:46Z-
dc.description.provenanceSubmitted by Sanches Olivia (olivias@unicamp.br) on 2020-05-28T15:40:46Z No. of bitstreams: 0. Added 1 bitstream(s) on 2020-08-27T19:15:55Z : No. of bitstreams: 1 2-s2.0-85078668043.pdf: 3005379 bytes, checksum: d761a397ecd2ecc0d588aa630bced5fa (MD5)en
dc.description.provenanceMade available in DSpace on 2020-05-28T15:40:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2020en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/342152-
dc.contributor.departmentDepartamento de Física Aplicadapt_BR
dc.contributor.unidadeInstituto de Física Gleb Wataghinpt_BR
dc.subject.keywordHydrophobicitypt_BR
dc.subject.keywordContact anglept_BR
dc.subject.keywordAgeingpt_BR
dc.identifier.source2-s2.0-85078668043pt_BR
dc.creator.orcid0000-0001-9205-1822pt_BR
dc.type.formArtigopt_BR
dc.identifier.articleid125398pt_BR
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