Eficiência do plasma de descarga em barreira dielétrica nas alterações físico-químicas do polietileno de alta densidade e do titânio
The superficial modification of materials is the object of studies in research centers, due to their impact in optimizing the applicability of the same. The use of plasma DBD is an alternative that blends the desired effects with the modification of surfaces and the low cost. In order to identify...
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| Formato: | Dissertação |
| Idioma: | pt_BR |
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Brasil
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| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/28509 |
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| Resumo: | The superficial modification of materials is the object of studies in research
centers, due to their impact in optimizing the applicability of the same. The use of
plasma DBD is an alternative that blends the desired effects with the modification
of surfaces and the low cost. In order to identify the effect of plasma on materials
that have different character connections, the physical-chemical modifications of
materials and their correlations with the species energies generated during the
treatment of plasma in dielectric barrier discharge (DBD) in the modification of
surface of high density polyethylene (HDPE) and Titanium. The efficiency of the
plasma was determined through triple Langmuir probe in order to check if it had
enough energy to promote chemical changes on the material surface. The physicochemical changes were diagnosed through surface characterization techniques
such contact angle, surface tension, X-ray excited photoelectron spectroscopy
(XPS), Fourier Transform Infrared Spectroscopy (ATR-FTIR), Scanning Electron
Microscopy (SEM) and Atomic Force Microscopy (AFM). The Langmuir probe
results showed that the generated plasma has sufficient energy to promote the
breakage of the bonds present in the PEAD, which corroborates the results
obtained in the characterization of the samples through XPS, FTIR-ATR and
surface tension. The XPS also showed the appearance of bonds such as TI-N and
Ti-N-O, which influences the increase in the surface wettability of titanium. |
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