TiO2 nano-filler and ionic liquid-blended polyurethane elastomer films for enhanced antistatic applications

In the current study, polyurethane (PU) blended with TiO 2 nano-filler and ionic liquid (IL) casted as films by solvent casting method is explored for antistatic applications. The crystalline structure of the obtained PU-films was confirmed by XRD analysis with amorphous broad peak at 2 θ ≈ 20°, whi...

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Bibliographic Details
Published in:Journal of materials science 2024-06, Vol.59 (24), p.10833-10843
Main Authors: Farooq, Aroosa, Mahmood, Azhar, Khan, Musammir
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Composites & Nanocomposites
Crystallography and Scattering Methods
Elastomers
Electronic packaging
Fillers
Ionic liquids
Materials Science
Nanorods
Percolation
Polymer Sciences
Polyurethane resins
Solid Mechanics
Surface resistivity
Tensile strength
Thermal stability
Titanium dioxide
Toughness
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Summary:In the current study, polyurethane (PU) blended with TiO 2 nano-filler and ionic liquid (IL) casted as films by solvent casting method is explored for antistatic applications. The crystalline structure of the obtained PU-films was confirmed by XRD analysis with amorphous broad peak at 2 θ ≈ 20°, while SEM analysis indicated the nanorod shape of TiO 2 in the TiO 2 -blended PU-film surface and porous morphology was observed for IL-blended films. In case of pristine PU-film, the tensile strength (6.1 MPa) and toughness (365.7 mJ/mm 3 ) with no elongation break (until≈ 80% max strain) were observed, while the addition of both TiO 2 and IL had lowered the tensile strength (2.5 ± 0.5 MPa), but still maintained a reasonable toughness (79–163 mJ/mm 3 ) of both the blended PU-films. All the PU-films were thermally stable up to maximum temperature of 473 °C. The surface resistivity values ( ρ s ) were highest for the pure PU-film (5.52 × 10 8 Ω/sq.) and at low concentration (2 wt%) of filler/IL, but reduced to almost half of the original values at higher amount (4 wt%) loading of both TiO 2 ( ρ s ≈ 3.25 × 10 8 Ω/sq.) and IL ( ρ s ≈ 2.66 × 10 8 Ω/sq.) in the blended films, attributed to the critical concentration within percolation threshold range. Hence, these blended PU-films with appropriate amount of filler and IL (≥ 4 wt%) could be promising durable materials for preventing build-up of static charges in the electronic and packaging industries.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-024-09792-1