Fabrication of nano-CuO-loaded PVA composite films with enhanced optomechanical properties

Herein, flexible, strong and optically tunable nano-CuO-loaded poly(vinyl alcohol) (PVA) composite films were fabricated by means of solution casting approach. The nanocomposite films were characterized using advanced analytical techniques. A small loading with CuO nanofiller resulted in prominent m...

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Bibliographic Details
Published in:Polymer bulletin (Berlin, Germany) Germany), 2021-03, Vol.78 (3), p.1551-1571
Main Authors: Aslam, Muhammad, Kalyar, Mazhar Ali, Raza, Zulfiqar Ali
Format: Article
Language:English
Subjects:
Biosensors
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Complex Fluids and Microfluidics
Crystal structure
Dielectric loss
Elongation
Energy gap
Flexural strength
Fourier transforms
Graphene
Investigations
Mechanical properties
Modulus of elasticity
Morphology
Nanocomposites
Optical properties
Optoelectronic devices
Optoelectronics
Organic Chemistry
Original Paper
Oscillators
Physical Chemistry
Polymer Sciences
Polyvinyl alcohol
Scanning electron microscopy
Soft and Granular Matter
Spectrum analysis
Tensile strength
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Summary:Herein, flexible, strong and optically tunable nano-CuO-loaded poly(vinyl alcohol) (PVA) composite films were fabricated by means of solution casting approach. The nanocomposite films were characterized using advanced analytical techniques. A small loading with CuO nanofiller resulted in prominent modifications of structural and optomechanical attributes of PVA-based nanocomposites. The comprehensive band structure and mechanical investigations of the prepared samples have been reported. The loading with just 0.5 wt% CuO nanofiller in PVA resulted in significant changes in direct band gap (5.29 to 3.16 eV), indirect band gap (4.91 to 2.88 eV), Urbach energy (0.22 to 1.12 eV), dispersion energy (1.45 to 1.92 eV), oscillator energy (5.74 to 3.25 eV), tensile strength (25.6 to 42.2 MPa), Young’s modulus (144 to 215 MPa), elongation at break (152.4 to 206.1%) and the flexural strength (4.1 to 32.2 MPa). The optical band gap calculated using Tauc’s relation, Wemple and DiDomenico single oscillator model and dielectric loss approach resulted in nearby values. Various theoretical models were employed to validate the experimentally determined Young’s moduli values. A possible application of such nanocomposite films might be in optoelectronic devices.
ISSN:0170-0839
1436-2449
DOI:10.1007/s00289-020-03173-9