Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/107288
Título: On the Effectiveness of Oxygen Plasma and Alkali Surface Treatments to Modify the Properties of Polylactic Acid Scaffolds
Autores/as: Donate González, Ricardo 
Alemán Domínguez, María Elena 
Monzón Verona, Mario Domingo 
Clasificación UNESCO: 3303 ingeniería y tecnología químicas
Palabras clave: Polymer
Low-pressure plasma
Plasma treatment
Surface modification
Biomedical applications, et al.
Fecha de publicación: 2021
Proyectos: Mejora de la Biofuncionalidad de Scaffolds Polimericos Obtenidos Por Fabricacion Aditiva 
Publicación seriada: Polymers 
Resumen: Surface modification of 3D-printed PLA structures is a major issue in terms of increasing the biofunctionality and expanding the tissue engineering applications of these parts. In this paper, different exposure times were used for low-pressure oxygen plasma applied to PLA 3D-printed scaffolds. Alkali surface treatments were also evaluated, aiming to compare the modifications introduced on the surface properties by each strategy. Surface-treated samples were characterized through the quantification of carboxyl groups, energy-dispersive X-ray spectroscopy, water contact angle measurements, and differential scanning calorimetry analysis. The change in the surface properties was studied over a two-week period. In addition, an enzymatic degradation analysis was carried out to evaluate the effect of the surface treatments on the degradation profile of the 3D structures. The physicochemical characterization results suggest different mechanism pathways for each type of treatment. Alkali-treated scaffolds showed a higher concentration of carboxyl groups on their surface, which enhanced the enzymatic degradation rate, but were also proven to be more aggressive towards 3D-printed structures. In contrast, the application of the plasma treatments led to an increased hydrophilicity of the PLA surface without affecting the bulk properties. However, the changes on the properties were less steady over time.
URI: http://hdl.handle.net/10553/107288
ISSN: 2073-4360
DOI: 10.3390/polym13101643
Fuente: Polymers [ISSN 2073-4360], v. 13 (10), 1643, (Mayo 2021)
Colección:Artículos
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