Poly(hydroxybutyrate) (PHB) obtained from sugar cane was dissolved in a blend of chloroform and dimethylformamide (DMF) and electrospun at 40 ºC. By adding DMF to the solution, the electrospinning process for the PHB polymer becomes more stable, allowing complete polymer crystallization during the jet travelling between the tip and the grounded collector. The influence of processing parameters on fiber size and...
The success of artificial prosthetic replacements depends on the fixation of the artificial prosthetic component after being implanted in the thighbone. The materials for fixation are subject to mechanical stresses, which originate permanent deformations, incipient cracks and even fatigue fractures. This work shows the possibility of monitoring the mechanical stress over time in prosthesis. In this way, highly ...
It is shown that electrospun poly(vynilidene fluoride) nanofibers are fully poled right after preparation and show b-phase contents of 70%, therefore being able to be implemented into electroactive devices without further processing steps. Further,the local piezoelectric properties of individual electrospun fibers have been studied by piezoresponse force microscopy. Piezoelectric response, polarization switching,...
Tese de doutoramento em Ciências (ramo de conhecimento em Física) ; In the last decades, the biomaterials and tissue engineering interdisciplinary research fields have been two of the most dynamic ones and have attracted increasing attention by the scientific community. With the advancements in the tissue engineering field the necessity of study and develop a wide variety of biomaterials with different prope...
Mestrado em Evidência e Decisão em Saúde ; Master Programme in Health Evidence and Decision
Introdução: A Síndrome da Imunodeficiência Adquirida (SIDA) em Portugal é a mais representativa causa de morte entre os 30 e os 39 anos de idade. O principal factor de prognóstico associado à progressão da doença e morte é a não adesão terapêutica. Alcançar níveis de adesão elevados torna-se fundamental para o bem estar destes doentes e da comunidade. Apesar da importância da adesão, não existe disponível um in...
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