Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/85102
Título: | Thermo-mechanical performance of nanostructured electrospun composites produced from poly(vinyl alcohol) and cellulosic compounds for potential uses as wound dressings |
Autor(es): | Teixeira, Marta Albertina Fertuzinhos, Aureliano Costa Freitas, David Silva Silva, C. Ferreira, Diana P. Felgueiras, Helena Prado |
Palavras-chave: | Poly(vinyl alcohol) Cellulose acetate Cellulose nanocrystalline Thermal behavior Quasi-static and dynamic mechanical performances |
Data: | 20-Jun-2023 |
Editora: | Elsevier 1 |
Revista: | Polymer |
Citação: | Teixeira, M. A., Fertuzinhos, A., Freitas, D. S., Silva, C., Ferreira, D. P., & Felgueiras, H. P. (2023, July). Thermo-mechanical performance of nanostructured electrospun composites produced from poly(vinyl alcohol) and cellulosic compounds for potential uses as wound dressings. Polymer. Elsevier BV. http://doi.org/10.1016/j.polymer.2023.126131 |
Resumo(s): | The purpose of this research was to analyze the morphology, thermal and mechanical properties of poly(vinyl alcohol) (PVA)-based electrospun mats reinforced with cellulose acetate (CA) or cellulose nanocrystalline (CNC) for potential applications in wound dressings. Bead-free and water-stable electrospun nanofibers made of blends of PVA and CA or CNC were successfully produced and crosslinked with glutaraldehyde vapor. Crosslinking slightly increased the nanofibers’ diameters in order of 43 and 13% for 80/20 PVA/CA and PVA/CNC electrospun mats, respectively, while maintaining their bead-free morphology. Thermogravimetry (TGA) and differential scanning calorimetry (DSC) evaluations were employed to determine the miscibility and the thermal response of the uncrosslinked and crosslinked mats, reporting a reduction in mass loss upon addition of CA and CNC and upon crosslinking process. Polymers’ powder and mats (before and after crosslinking) crystallinity was assessed by X-ray diffraction analysis (XRD). Crosslinked mats experienced a slight reduction in crystallinity compared to the uncrosslinked. Static and dynamic tensile strength tests revealed that CA and CNC doped mats enhanced the Young's modulus and lowered deformation at failure compared to pristine PVA electrospun mats. Data from storage modulus (E’) demonstrated the strength of the physical interactions formed between PVA and the cellulosic derivatives (either before and after crosslinking), highlighting the stiffness of CA (231.58 MPa for the 80/20 mat) and, particularly, CNC (742.04 MPa for the 80/20 mat). This research uncovered important information concerning the chemical and physical relation between polymeric matrices and additives, essential for the proper selection of materials for wound dressings production. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/85102 |
DOI: | 10.1016/j.polymer.2023.126131 |
ISSN: | 0032-3861 |
e-ISSN: | 1873-2291 |
Versão da editora: | https://www.sciencedirect.com/science/article/pii/S0032386123004615 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series DET/2C2T - Artigos em revistas internacionais com arbitragem científica |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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1-s2.0-S0032386123004615-main.pdf | 5,85 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons