Effects of cold SF6 plasma treatment on a-C:H, polypropylene and polystyrene

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniversidade Estadual de Campinas (UNICAMP)-
Autor(es): dc.creatorAmorim, Milena Kowalczuk Manosso [UNESP]-
Autor(es): dc.creatorRangel, Elidiane Cipriano [UNESP]-
Autor(es): dc.creatorLanders, Richard-
Autor(es): dc.creatorDurrant, Steven F. [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:33:43Z-
Data de disponibilização: dc.date.available2022-02-22T00:33:43Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-03-15-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.surfcoat.2020.125398-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/201505-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/201505-
Descrição: dc.descriptionThe 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 surface.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionLaboratório de Plasmas Tecnológicos Instituto de Ciência e Tecnologia de Sorocaba Universidade Estadual Paulista (UNESP), Avenida Três de Marco, 511, Alto da Boa Vista-
Descrição: dc.descriptionGrupo de Física de Superfícies Instituto de Física Gleb Wataghin Universidade Estadual de Campinas (UNICAMP)-
Descrição: dc.descriptionLaboratório de Plasmas Tecnológicos Instituto de Ciência e Tecnologia de Sorocaba Universidade Estadual Paulista (UNESP), Avenida Três de Marco, 511, Alto da Boa Vista-
Descrição: dc.descriptionCAPES: 001-
Descrição: dc.descriptionFAPESP: 2017/15853-0-
Idioma: dc.languageen-
Relação: dc.relationSurface and Coatings Technology-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAgeing-
Palavras-chave: dc.subjectContact angle-
Palavras-chave: dc.subjectHydrophobicity-
Palavras-chave: dc.subjectPolymers-
Título: dc.titleEffects of cold SF6 plasma treatment on a-C:H, polypropylene and polystyrene-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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