Electrospun polyvinyl alcohol-chitosan/LaB6 fiber nanocomposites: Synergistic enhancement of thermal, surface, dielectric, and bioactive properties
Küçük Resim Yok
Tarih
2025
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Electrospun polyvinyl alcohol-chitosan (PVA-CS) fiber nanocomposites reinforced with lanthanum hexaboride nanoparticles (LaB6 NPs) were successfully fabricated and systematically characterized to investigate the synergistic enhancement of their multifunctional properties. SEM analysis confirmed the uniform distribution of LaB6 within a smooth, defect-free fibrous morphology, while XRD patterns verified the structural integration of LaB6 in the polymer matrix. Thermal analysis revealed a significant improvement in thermal stability, with the onset decomposition temperature increasing from 280 degrees C to 320 degrees C at 7.5 wt% LaB6 content. The addition of LaB6 markedly influenced surface characteristics - the contact angle decreased from 57.52 degrees to 43.24 degrees, and the surface free energy increased from 51.67 to 59.77 mN m(-1), demonstrating improved wettability. Dielectric and impedance measurements revealed that the dielectric constant increased from 4.1 to 6.2 at 100 kHz, and the AC conductivity reached 1.7 x 10(-5) S/cm, indicating the formation of enhanced charge transport pathways. Furthermore, the LaB6-loaded nanofibers exhibited improved bioactivity, with DPPH radical scavenging increasing from 21.3 % to 41.6 % and inhibition zones extending up to 14.5 mm against S. aureus. The combined improvements in structural, thermal, surface, and electrical behaviors reveal the potential of PVA-CS/LaB6 fiber nanocomposites as multifunctional materials for advanced biomedical and surface engineering applications.
Açıklama
Anahtar Kelimeler
Pva, Chitosan, Electrospinning, Surface Properties, Dielectric Properties, Antimicrobial Activity
Kaynak
International Journal of Biological Macromolecules
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
331
