Biodegradation Study of Polyvinyl Alcohol‐Based Biocomposites and Bionanocomposites

Majeed, Zahid; Mubashir, Muhammad; Show, Pau Loke; Manzoor, Eefa

doi:10.1002/9781119593218.ch2

Cited by 1 publication

(1 citation statement)

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“…PVA is well known for its facility to form stable films, superior optical transparency, and high solubility in water. PVA has been highly researched for its ability as a biocompatible carrier for drug delivery applications in clinical studies, and for its biodegradable property [10,11]. For decades, various fillers have been incorporated into PVA films and their structure-property relationship has been investigated.…”

Section: Introductionmentioning

confidence: 99%

Nanostructural Characterization of Luminescent Polyvinyl Alcohol/Graphene Quantum Dots Nanocomposite Films

Elumalai,

Rodríguez,

Kovtun

et al. 2023

Nanomaterials

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This study focuses on the fabrication of polymer nanocomposite films using polyvinyl alcohol (PVA)/graphene quantum dots (GQDs). We investigate the relationship between the structural, thermal, and nanoscale morphological properties of these films and their photoluminescent response. Although according to X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), and differential thermal analysis (DTA), the incorporation of GQDs does not significantly affect the percentage crystallinity of the PVA matrix, for a range of added GQD concentrations, atomic force microscopy (AFM) showed the formation of islands with apparent crystalline morphology on the surface of the PVA/GQD films. This observation suggests that GQDs presumably act as nucleating agents for island growth. The incorporation of GQDs also led to the formation of characteristic surface pores with increased stiffness and frictional contrast, as indicated by ultrasonic force microscopy (UFM) and frictional force microscopy (FFM) data. The photoluminescence (PL) spectra of the films were found to depend both on the amount of GQDs incorporated and on the film morphology. For GQD loads >1.2%wt, a GQD-related band was observed at ~1650 cm−1 in FT-IR, along with an increase in the PL band at lower energy. For a load of ~2%wt GQDs, the surface morphology was characterized by extended cluster aggregates with lower stiffness and friction than the surrounding matrix, and the PL signal decreased.

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Section: Introductionmentioning

confidence: 99%