| Texto completo | |
| Autor(es): |
Maia, Lana S.
;
de Bomfim, Anne Shayene C.
;
de Oliveira, Daniel M.
;
Pinhati, Fernanda R.
;
da Conceicao, Monique O. T.
;
Barud, Hernane S.
;
Medeiros, Simone A.
;
Rosa, Derval S.
;
Mulinari, Daniella R.
Número total de Autores: 9
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Applied Polymer Science; v. N/A, p. 13-pg., 2023-01-19. |
| Resumo | |
This study aimed to evaluate the effect of pullulan (Pull) on a renewable polyurethane sponge-like scaffold synthesized from the Pull mixture with the castor oil-based polyol and the prepolymer using the situ foaming method. The Pull contents on the sponge-like are 5, 10, and 20 wt.%. The samples were evaluated by optical microscopy (OM), scanning electron microscopy (SEM), density, Fourier transform infrared spectroscopy (FTIR), contact angle, Thermogravimetry, X-ray diffraction analysis (XRD), and compression strength test, respectively. FTIR results indicated that Pull was hydrogen-bonded to PU foam chains and increased the sponge-like scaffolds density, inducing a decrease in average cell size compared to the pristine PU, confirming that they act as nucleating agents. The Pull addition improved PU foams' hydrophobicity and mechanical properties and caused a thermal stability median between Pull and pristine PU. Thus, all renewable sponge-like scaffolds were hydrophobics and presented appropriate mechanical behavior, exhibiting better physicochemical properties, and appearing as promising candidates for biomedical applications. (AU) | |
| Processo FAPESP: | 19/04269-0 - Avaliação do potencial de novas nanopartículas poliméricas como agentes de encapsulação e liberação simultânea de um agente fotossensibilizador e um princípio ativo quimioterápico |
| Beneficiário: | Simone de Fátima Medeiros Sampaio |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 20/13703-3 - Materiais porosos ecológicos para a recuperação e reavaliação de metais recuperados de água contaminada |
| Beneficiário: | Derval dos Santos Rosa |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |