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Título: DEVELOPMENT OF AN AFFORDABLE DROPLET SHAPE ANALYSIS SYSTEM FOR THE EVALUATION OF SURFACE PROPERTIES AND SURFACE MODIFICATION OF POLYAMIDE TO ACHIEVE A SUPERAMPHIPHOBIC SURFACE
Autor: AYRTON ALEF CASTANHEIRA PEREIRA
Colaborador(es): JOSE ROBERTO MORAES D ALMEIDA - Orientador
Catalogação: 14/JAN/2025 Língua(s): PORTUGUESE - BRAZIL
Tipo: TEXT Subtipo: THESIS
Notas: [pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio.
[en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio.
Referência(s): [pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=69161&idi=1
[en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=69161&idi=2
DOI: https://doi.org/10.17771/PUCRio.acad.69161
Resumo:
Polymeric superamphiphobic surfaces have attracted great interest within the scientific community and industry because they combine all the advantageous characteristics of polymers with unique surface properties, such as liquid repellency and self-cleaning. A variety of polymers have potential for use in applications that require superamphiphobic surfaces, among them polyamide (PA). Although water repellency can be easily achieved, the production of oil-repellent materials is more difficult due to oil low surface tension. Just like any advance in research and development, progress in polymeric superamphiphobic surfaces requires characterization. A fast way to characterize superamphiphobicity is measuring the contact angle of a drop shape in touch with the surface. Despite advances in computing and optical devices, the use of optical methods for an accurate, robust and in-depth evaluation of interfacial properties is still limited. Thus, the present work had two development fronts: (i) build an accessible, versatile and reliable droplet shape analysis system for the evaluation of surface properties, and (ii) modify the polyamide surface to reach superamphiphobicity by a simple and industrially viable fabrication/modification method. Regarding the first work front, a free and complete solution for drop research, called ZeDrop, was created. Regarding the second work front, an amphiphobic surface on PA 6 was achieved by combining an adequate roughness, obtained by the application of a coating formed by nanoparticles and polymeric binder, and a low surface energy, resulting from the activation of the surface by UVO prior to its fluorosilanization.
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