Electro-thermal properties and characterization of the flexible polyurethane-graphene nanocomposite films

Owji, Erfan; Ostovari, Fatemeh; Keshavarz, Alireza

doi:10.1088/1402-4896/ac8c05

Cited by 6 publications

(2 citation statements)

References 84 publications

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“…This insight leads to the importance of composites, where two polymers are combined to achieve better properties than their constituent polymers. Composites have gained importance over other materials due to their easy processability [3], enhanced optical [4] electrical, mechanical and dielectric properties [5]. Polymer composites are suitable for use in technical fields and daily life because they are lightweight, have higher chemical and thermal resistance, and have better electrical properties [6,7].…”

Section: Introductionmentioning

confidence: 99%

Improvement in structural, thermal, charge transport and mechanical properties of poly (methyl methacrylate)/polyindole composites for optoelectronic devices

et al. 2023

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This study encompasses the synthesis, characterization, optical properties, thermal, mechanical, and electrical characteristics of a series of in situ polymerized poly (methyl methacrylate) (PMMA) with different contents of polyindole (PIN) composites. The formation of composites was characterized by FTIR, UV-visible, XRD, FE-SEM, AFM, DSC and TGA. Tensile testing techniques was used to determine mechanical properties such as tensile strength, modulus, hardness and impact strength of PMMA/PIN. Impedance spectroscopy was used to study the electrical properties of the prepared composites. The interaction between the NH moiety of indole and ester groups of PMMA was established through FTIR. The optical bandgap energy determined from UV spectroscopy shows a declining trend, whereas the refractive index grows significantly with the loading of indole up to 5 wt%. The decrease in broadness and intensity of the XRD peak confirmed the presence of an indole component in the PMMA matrix. The holes in the surface morphology of PMMA was changed into uniformly dispersed particles, confirming the dispersion of PIN in the PMMA matrix. The surface roughness obtained from AFM increases with the addition of PIN to PMMA. DSC measurements show that the glass transition temperature of the polymer increases with the inclusion of the indole moiety. TGA indicates that the addition of PIN has a positive effect on the thermal stability of PMMA/PIN composites. The results of mechanical testing showed an increase in Youngs modulus, tensile strength, and impact strength with the addition of PIN. The AC impedance results show an increase in the dielectric constant and conductivity of PMMA with the PIN addition. The PMMA/PIN composites with high tensile strength, conductivity and dielectric constant can be used in the fabrication of optoelectronic devices and EMI shielding.

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Section: Introductionmentioning

confidence: 99%

Improvement in structural, thermal, charge transport and mechanical properties of poly (methyl methacrylate)/polyindole composites for optoelectronic devices

et al. 2023

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“…58 The use of graphene alone in the PU matrix in our previous study showed the good potential of them in thermoelectric applications. 59 Hence, the impact of diisocyanates on the final properties of PU composites like electrothermal properties requires further research.…”

Section: Introductionmentioning

confidence: 99%

Influence of the chemical structure of diisocyanate on the electrical and thermal properties of in situ polymerized polyurethane–graphene composite films

Owji

Ostovari

Keshavarz

2022

Phys. Chem. Chem. Phys.

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Metal Replacement in Aeronautics Applications Using Two‐Dimensional Multifunctional Composites

Valorosi,

Scidà,

Chiodini

et al. 2024

Adv Eng Mater

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Carbon‐based composites have replaced metals in many structural components of modern airplanes; however, functional applications still require metal conductors and devices. Here, the production and integration in small‐scale airplane parts of electric devices based on metal‐free layered composites of graphene, boron nitride, and polymers are described. Thanks to their two‐dimensional structure, these materials feature excellent tunable thermoelectrical properties and high flexibility. We describe the production and performance of heaters and ice sensors installed on scaled NACA‐0012 airfoils to avoid ice formation, to remove ice or to detect the ice on the outer skin of the airfoil. We demonstrate that we can tune the electrical conductivity of the composite heating element from 105 to 103 S m−1 that is preserved even after 1000 bending cycles. The heaters successfully achieve anti‐icing and deicing in representative icing conditions and can sustain high‐power densities as required for electrothermal ice‐protection systems in aviation. The composite material can be readapted into a sensor able to detect ice formation in real time in an icing wind tunnel. Moreover, the possibility to use the heaters developed as heating molds to cure composite materials by out‐of‐oven curing, with a significant energy saving potential, is demonstrated.

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Electro-thermal properties and characterization of the flexible polyurethane-graphene nanocomposite films

Cited by 6 publications

References 84 publications

Improvement in structural, thermal, charge transport and mechanical properties of poly (methyl methacrylate)/polyindole composites for optoelectronic devices

Improvement in structural, thermal, charge transport and mechanical properties of poly (methyl methacrylate)/polyindole composites for optoelectronic devices

Influence of the chemical structure of diisocyanate on the electrical and thermal properties of in situ polymerized polyurethane–graphene composite films

Metal Replacement in Aeronautics Applications Using Two‐Dimensional Multifunctional Composites

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