Visual UV-sensitive colorimetric film deposited by PECVD

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Autor(es): dc.contributorUniversidade Federal de São Carlos (UFSCar)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Estadual de Campinas (UNICAMP)-
Autor(es): dc.creatorde Freitas, Amanda de S.M.-
Autor(es): dc.creatorRibeiro, Rafael P.-
Autor(es): dc.creatorRodrigues, Jéssica S.-
Autor(es): dc.creatorde Lima, Lucas F.-
Autor(es): dc.creatorFernandes, Felipe O.-
Autor(es): dc.creatorWaldman, Walter R.-
Autor(es): dc.creatorda Cruz, Nilson C.-
Autor(es): dc.creatorDelgado-Silva, Adriana O.-
Autor(es): dc.creatorRangel, Elidiane C.-
Data de aceite: dc.date.accessioned2025-08-21T22:35:12Z-
Data de disponibilização: dc.date.available2025-08-21T22:35:12Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-09-15-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.matchemphys.2024.129687-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/306239-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/306239-
Descrição: dc.descriptionThe combination of ultraviolet (UV) light and oxygen has a detrimental effect on various materials. In polymers, this interaction can result in irreversible changes in the material's color and gloss, as well as a decline in its strength and flexibility. Changes in mechanical properties are the primary cause of crack formation due to chain splitting, impacting both the material's properties and the device's performance. In such cases, total or partial replacement of the product is necessary to prevent operational interruptions and accidents. The use of a visual colorimetric coating, applicable to different materials with complex geometries, that enables measurement of the exposure of the coated material to UV light may serve to predict in situ degradation of devices. This study explores the feasibility of creating a colorimetric film sensitive to ultraviolet light C (UV–C) deposited on a polypropylene substrate. The film was deposited using radiofrequency 13.56 MHz, 40 W, 30 min, low-pressure plasmas with oxygen (20 %), acetylene (40 %), and hexamethyldisiloxane (HMDSO) (40 %) in an atmosphere of 23 Pa. The impact of UV-C irradiation on the sample chemical structure, thickness, morphology, and roughness was investigated. Samples were examined every 3 h of UV-C exposure through Ultraviolet–Visible Spectroscopy (UV–Vis), Surface Plasmon Resonance (SPR), and photographs analyzed by Hue-Saturation-Lightness (HSL). The films are composed of C, O, H, and Si in a typical amorphous carbon-hydrogenated-oxygenated (C[dbnd]C, C[dbnd]O, O–H, and C–H) network doped with Si (Si–CH3, Si–O, Si–OH) groups, exhibiting an amber color. Upon UV-C irradiation, the concentration of unsaturated C bonds (C[dbnd]C and C[dbnd]O) decreases, Si is depleted, and a gradual color change occurs until the film becomes colorless after 30 h of exposure. The proposed mechanism for the modification in the composition and structural arrangement of the film leading to discoloration is based on the results of the analyses conducted.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionFederal University of São Carlos (UFSCar), SP-
Descrição: dc.descriptionSão Paulo State University (UNESP), SP-
Descrição: dc.descriptionState University of Campinas (UNICAMP), SP-
Descrição: dc.descriptionSão Paulo State University (UNESP), SP-
Descrição: dc.descriptionCAPES: 001–1687163-
Idioma: dc.languageen-
Relação: dc.relationMaterials Chemistry and Physics-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectDiscoloration process-
Palavras-chave: dc.subjectPECVD-Deposited thin films-
Palavras-chave: dc.subjectUltraviolet irradiation-
Palavras-chave: dc.subjectVisual colorimetric coating-
Título: dc.titleVisual UV-sensitive colorimetric film deposited by PECVD-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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