Development and characterization of HPMC/NaAlg-CuO bio-nanocomposites: Enhanced optical, electrical, and antibacterial properties for sustainable packaging applications.

Copper oxide nanoparticles (CuO NP) were incorporated into a hydroxypropyl cellulose (HPMC) and sodium alginate (NaAlg) matrix through a casting method to create bio-nanocomposite films. XRD analysis confirmed the semi-crystalline nature of the HPMC/NaAlg matrix, with a broad peak at 2θ = 21.22°, which decreased in intensity as CuO concentration increased, indicating a shift towards an amorphous structure.