Design of interconnected <scp>1D</scp> nanomaterials with selective localization in biodegradable binary thermoplastic nanocomposite films for effective electromagnetic interference shielding effectiveness

Nath, Krishnendu; Ghosh, Suman Kumar; Katheria, Ankur; Das, Palash; Chowdhury, Sreeja Nath; Hazra, Puja; Azam, Syful; Das, Narayan Ch.

doi:10.1002/pat.5949

Cited by 16 publications

(16 citation statements)

References 43 publications

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“…This performance can be adjusted by selecting the preparation method and the rubber matrix. The tunneling distance is inversely proportional to the electrical conductivity as per the definition. , σ DC ∝ e − A d where d is the tunnel distance, and A is the tunnel parameter. From a practical point of view, for the calculation of tunnel distance, eq has been modified below: d ∝ p − 1 / 3 …”

Section: Resultsmentioning

confidence: 99%

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Super-Stretchable, Self-Healing 2D MXene-Based Composites for Thermal Management and Electromagnetic Shielding Applications

Das

Katheria

Jana

et al. 2023

ACS Appl. Eng. Mater.

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MXene-based elastomeric electromagnetic radiation shielding composites are encouraging aspirants to ensure the secure performance of stretchable and wearable electronic gadgets. However, it is a tough challenge to construct effective stretchable elastomer/MXene composites with outstanding electromagnetic radiation shielding efficiency, healing capability, thermal management, and recyclability. To simultaneously promote the multifunctional characteristics of the elastomeric composites, we prepared zinc oxide cross-linked and 1-(3-aminopropyl) imidazole (API)-grafted XNBR/MXene composites by forming continuous conductive nacre-like network via a simple two-step wet cum melt mixing strategy. Contributed by the structure, the composites show excellent shielding effectiveness of −27.4 dB (in the frequency range of 8.2−12.4 GHz) and a thermal conductivity of 1.24 W/mK while retaining the electrical conductivity of 0.5 S/cm, room temperature self-healing ability of 46.8%, and 100% recyclability with desirable stretchability and mechanical strength. Notably, the continuous conducting network remains unaffected even after reprocessing, stretching, bending, extended sunlight exposure, and chemical treatment, which validates its all-round chemical and mechanical performance. Such prolonged deformations show more than 95% retention of shielding effectiveness. Collectively, our multifunctional elastomeric composites supply a prominent directive for the establishment of high-performance elastomeric composites with outstanding shielding efficiency, self-healing ability, thermal management, recyclability, and excellent mechanical behavior.

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Section: Resultsmentioning

confidence: 99%

“…The tunneling distance is inversely proportional to the electrical conductivity as per the definition. 53,54 e Ad…”

Section: Electrical Conductivity Of Pure Xnbr and Its Compositesmentioning

confidence: 99%

Super-Stretchable, Self-Healing 2D MXene-Based Composites for Thermal Management and Electromagnetic Shielding Applications

Das

Katheria

Jana

et al. 2023

ACS Appl. Eng. Mater.

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“…The mechanical properties of the MNPs/TPU/PPy films are illustrated from a practical perspective. As a segmented copolymer with the assembly of hard and soft blocks, TPU combines the mechanical properties of rubber and plastic at the same time, enabling it to absorb high impact . With a sufficiently high modulus and excellent abrasion resistance, the flexibility and tensile properties of the TPU framework guarantee outstanding mechanical properties of the films.…”

Section: Resultsmentioning

confidence: 99%

“…As a segmented copolymer with the assembly of hard and soft blocks, TPU combines the mechanical properties of rubber and plastic at the same time, enabling it to absorb high impact. 14 With a sufficiently high modulus and excellent abrasion resistance, the flexibility and tensile properties of the TPU framework guarantee outstanding mechanical properties of the films. Moreover, as shown in the FT-IR spectrum (Figure 6a), a broad band is located in the 3500−3400 cm −1 frequency region of the spectrum, attributed to a strong hydrogen bonding interaction formed between the isocyanate bonds (−NCO) in hard segments as well as the polyol structure in soft segments of TPU 54 and the secondary amine groups (−NH) on PPy.…”

Section: Measurement and Analysis Of The Mechanical Propertiesmentioning

confidence: 99%

Dopant Engineering of Flexible MNPs/TPU/PPy Core–Shell Films for Controllable Electromagnetic Interference Shielding

Zhao

et al. 2023

ACS Appl. Mater. Interfaces

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Intrinsically conductive polymers have attracted much attention in the electromagnetic interference (EMI) shielding field because of their high conductivity and favorable flexibility. Delocalized π-electrons migrating along the conjugated long-chain structures can form a current. Based on this special conductive mechanism, the doping process significantly influences the conductivity and EMI shielding efficiency (SE). However, it is challenging to investigate the influence of the doping process on EMI shielding performance, which would enable the optimization of dopant selection. In this study, dopant engineering was explored for controllable conductivity, EMI SE, and mechanical properties. Polypyrrole (PPy) doped with various dopants serves as a conductive coating owing to its adjustable conductivity and abundant functional groups. Elastic thermoplastic polyurethane was chosen as the porous framework because of its high tensile strength, and magnetic nanoparticles supplied the magnetic loss in the 3D network. Eventually, the composite film showed the best properties when PPy was doped with sodium ptoluenesulfonate. The film exhibited an average SE of 26.3 dB in the X band and a specific SE of 1563.17 dB cm 2 g −1 with a thickness of merely 0.2 mm. This film withstood a tensile stress of 16.0 MPa, while the breaking elongation ratio reached 538.0%. After 10,000 cyclic bending, 92.3% of the EMI shielding property was retained. In summary, this study highlights the most suitable dopant for EMI shielding applications and provides a prospective alternative for advanced, flexible, and smart devices.

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“…Organic materials, like polymer foam, have insufficient temperature resistance and produce harmful substances under high temperatures . Inorganic materials, containing carbon-based and ceramic-based materials, have been widely used because of their extraordinary thermos-stability. − Especially the oxide ceramics, like asbestos and high silica glass fiber, have high temperature resistance and oxidation resistance, but these materials cannot meet the harsh thermal insulation and environmental requirements on account of their high thermal conductivity and carcinogenicity. , Therefore, it is very urgent to develop nontoxic inorganic materials with low thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characteristic of the Novel Multiple-Layer Thermal Insulation Nanocomposite Materials

Kong¹,

Li²,

Gao³

et al. 2023

ACS Sustainable Chem. Eng.

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Thermal insulation nanomaterials based on aerogels have attracted more and more researchers' attention due to their low thermal conductivity and lightweight characteristics. However, the high-temperature thermal insulation performance and the mechanical strength of the material itself remain a great challenge. We developed a method to construct multiscale structures of thermal insulation materials based on dry aerogel particles, ultralong nanowires, and interfacial crosslinkers. In our work, the introduction of surfactants enabled the effective dispersion of aerogels and nanowires in the aqueous solution instead of in an organic solvent. Also, thanks to the synergistic effect of crosslinkers and nanowires, the materials exhibit a good mechanical strength; the maximum value of tensile strength for nanocomposite materials is up to 0.76 MPa. Aerogels with a resistance of 1000 °C and reflecting screens were adopted to prepare the multiple-layer thermal insulation materials, enabling the obtained material to show the outstanding thermal insulation property [0.028 W (m•K) −1 at 25 °C and 0.059 W (m•K) −1 at 800 °C]; additionally, when the temperature of the heating surface was raised to 800 °C, the back surface temperature of 15 mm materials increased to an ultimate temperature of only 218 °C after heat treatment for 500 s. These favorable multi-features indicate the materials are ideal for thermal insulation in industrial, aerospace, and even extreme environmental conditions.

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Design of interconnected 1D nanomaterials with selective localization in biodegradable binary thermoplastic nanocomposite films for effective electromagnetic interference shielding effectiveness

Cited by 16 publications

References 43 publications

Super-Stretchable, Self-Healing 2D MXene-Based Composites for Thermal Management and Electromagnetic Shielding Applications

Super-Stretchable, Self-Healing 2D MXene-Based Composites for Thermal Management and Electromagnetic Shielding Applications

Dopant Engineering of Flexible MNPs/TPU/PPy Core–Shell Films for Controllable Electromagnetic Interference Shielding

Preparation and Characteristic of the Novel Multiple-Layer Thermal Insulation Nanocomposite Materials

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