Tuning of renewable sponge-like polyurethane physical-chemical and morphological properties using the pullulan as a reactive filler

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.

• 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