Partner: J. Silva Michael |
Ostatnie publikacje
1. | Silva M.J.♦, Dias Y.J.♦, Zaszczyńska A., Kołbuk-Konieczny D., Kowalczyk T., Sajkiewicz P.Ł., Yarin A.♦, Three-phase bio-nanocomposite natural-rubber-based
microfibers reinforced with cellulose nanowhiskers
and 45S5 bioglass obtained by solution blow spinning, JOURNAL OF APPLIED POLYMER SCIENCE, ISSN: 0021-8995, DOI: 10.1002/app.54661, Vol.140, No.45, pp.e54661-1-18, 2023 Streszczenie: Aiming at biomedical applications, the present work developed a new bio-nanocomposite fibrous mat based on natural rubber (NR) reinforced with 45S5 bioglass particles (BG) and cellulose nanowhiskers (CNW), which reveals excellent mechanical properties, good biocompatibility and bioactivity properties. Słowa kluczowe: bioactive particles,cellulose nanowhiskers,fibrous mat bio-nanocomposite,natural rubber Afiliacje autorów:
| 100p. | ||||||||||||||||||||||||||||
2. | Silva M.J.♦, Dias Y.J.♦, Zaszczyńska A., Rojas Robles J.♦, Abiade J.♦, Kowalczyk T., Kołbuk-Konieczny D., Sajkiewicz P., Yarin A.L.♦, Biocomposite-based fibrous scaffolds of natural rubber/polyhydroxybutyrate blend reinforced with 45S5 bioglass aiming at biomedical applications, Polymer Composites, ISSN: 0272-8397, DOI: 10.1002/pc.27839, pp.1-21, 2023 Streszczenie: The solution blow spinning technique was used to fabricate a new biocomposite fibrous mat consisting of natural rubber (NR) and polyhydroxybutyrate (PHB) bioblend, with various loads of 45S5 bioglass (BG) particles. According to SEM analysis, NR fibers exhibited ribbon-like morphologies, whereas the addition of PHB resulted in improved fiber formation and a reduction in their diameter. In NR-PHB/BG biocomposites with varying BG loadings, typical thermal degradation events of PHB (stage i) and NR (stage ii) were observed. In comparison with pure PHB, the TG/DTG curves of NR-PHB/BG specimens revealed a lower stage i degradation peak. Such an outcome is possibly due to the fact that PHB in the NR-PHB fibers is located predominantly at the surface, that is, PHB is more susceptible to thermal degradation. The NR-PHB/BG biocomposite possessed an increased stiffness due to the addition of PHB and BG, resulting in an increased stress and a decreased strain at rupture compared to the pure NR and NR-PHB mats. DMA analysis revealed two well-defined regions, above and below the glass transition temperature (Tg), for the storage modulus (E') of the NR-PHB/BG specimens. The values of E' were in both regions for NR-PHB/BG specimens increased at higher BG content. The measured tanδ = E″/E' was used to determine the Tg value for all specimens, with Tg found to be in the −49 to −46°C range. Finally, NR-PHB/BG biocomposite fibrous were proven noncytotoxic by in-vitro testing on fibroblasts. These biocomposites enhanced cell growth, holding great promise for tissue engineering applications. Słowa kluczowe: 45S5 bioglass, biocomposite fibrous mat, biomedical applications, natural rubber, polyhydroxybutyrate, solution blow spinning Afiliacje autorów:
| 70p. |