Synthesis and <scp>EMI</scp> shielding studies of polyaniline grafted conducting nanohybrid

Raza, Asif; Nasir, Abdul; Tahir, Muhammad; Taimur, Shaista; Yasin, Tariq; Nadeem, Muhammad

doi:10.1002/app.49680

Cited by 14 publications

(9 citation statements)

References 43 publications

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“…However, as expected, beyond this optimum amount of 10.95 mmol, the oxidant efficiency began to drop due to the excessive monomer amount to oxidize. Similar trends were also reported from the other researchers, as these studies agreed that too many monomers led to the reduction in polymerization yield [107][108][109][110]. The reduction was due to the incomplete conversion of aniline monomer to PANi [107] due to insufficient oxidation [110].…”

Section: Polymerization Yieldsupporting

confidence: 88%

“…Similar trends were also reported from the other researchers, as these studies agreed that too many monomers led to the reduction in polymerization yield [107][108][109][110]. The reduction was due to the incomplete conversion of aniline monomer to PANi [107] due to insufficient oxidation [110]. In the case of the relationship between the acid concentration with polymerization yield, the improvement in yield was noted when the amount of acid was increased from 3.75 to 12.5 mmol.…”

Section: Polymerization Yieldsupporting

confidence: 87%

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Synthesis and Conductivity Studies of Poly(Methyl Methacrylate) (PMMA) by Co-Polymerization and Blending with Polyaniline (PANi)

et al. 2021

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Poly(methyl methacrylate) (PMMA) is a lightweight insulating polymer that possesses good mechanical stability. On the other hand, polyaniline (PANi) is one of the most favorable conducting materials to be used, as it is easily synthesized, cost-effective, and has good conductivity. However, most organic solvents have restricted potential applications due to poor mechanical properties and dispersibility. Compared to PANi, PMMA has more outstanding physical and chemical properties, such as good dimensional stability and better molecular interactions between the monomers. To date, many research studies have focused on incorporating PANi into PMMA. In this review, the properties and suitability of PANi as a conducting material are briefly reviewed. The major parts of this paper reviewed different approaches to incorporating PANi into PMMA, as well as evaluating the modifications to improve its conductivity. Finally, the polymerization condition to prepare PMMA/PANi copolymer to improve its conductivity is also discussed.

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Section: Polymerization Yieldsupporting

confidence: 88%

Section: Polymerization Yieldsupporting

confidence: 87%

Synthesis and Conductivity Studies of Poly(Methyl Methacrylate) (PMMA) by Co-Polymerization and Blending with Polyaniline (PANi)

et al. 2021

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“…In another study, metal adsorption bands were observed on functional groups, especially S = O at 1580 and 1490 cm − 1 (Raza et al, 2021). Nitrogen and sulfur bonds were observed in the functionalized PU sample of this study.…”

Section: Discussionsupporting

confidence: 58%

Fabrication of DTC-g-PE-DA@GO@PU chelator for extraction of heavy metals from e-waste

Jalili

Mokhtari

Teimouri

et al. 2022

Preprint

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In this study, mill polyurethane was functionalized for use in the sequential recovery of precious and toxic metals from electronic waste as a solution containing a mixture of metals and elements. For this purpose, graphene oxide (GO), polyethylene imine-dopamine, and dithiocarbamate were used to create functional groups on the outer surface of the Millipolyurethane. Scanning Electron Microscope (SEM) was used to evaluate the morphology and activation of Millipolyurethane sites and to examine the characteristics of the cavities after exposure to acidic solutions during functionalization steps. Raw and functional Millipolyurethane functional groups were evaluated using FOURIER TRANSFORM INFRARED SPECTROMETER (FTIR). The results showed that the cavities in functionalized Millipolyurethane were 100 to 200 μm in size and the changes in the surface to volume ratio were appropriate. Also, the N-H bond was related to the first type of amine in 3297.26 cm-1, and double bond C = N in 1640.5 cm-1 was specified. Due to double bond existence and its activation, this factor can bond with other elements, including metals. Sulfonic bonds (S = O) at 1337 cm-1 indicate the presence of sulfur bases combined with alkyl and aryl, which can bond with OH, which eventually converts to sulfonic acid. Under these conditions, the exchange of metal ions by the sulfonic base is also expected. Given the presence of such bands in the FTIR spectrum obtained from raw PU, it can be concluded that PU functionalization has been performed properly. Metals can bind to existing functional groups that form the solid-metal phase complex (MS), which is very effective in removing it from the aqueous solution, and the process of metal recovery and complex formation with them is maintained to the desired level. Open cavities and high porosity, especially in functionalized PU samples, are well illustrated by electron imagery, which provides a high level of metal recovery.

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“…Carbon-based materials, particularly carbon nanotubes , and graphene, , have been studied as hot spots in various fields. Not surprisingly, the carbon nanotube and graphene materials also exhibit outstanding electromagnetic wave absorption and shielding properties. , Conducting polymer composites [polyaniline (PANI), polypyrrole (PPy), polythiophene (PTh)] showed various excellent performances in the use of Joule heating and EMI shielding applications because of the adjustable conductivity. − Besides, conducting polypyrrole can absorb the full spectrum light and convert it to thermal energy, which can be used for photothermal conversion. However, the lack of mechanical strength limits the commercial applications of the conductive polymers. , …”

Section: Introductionmentioning

confidence: 99%

Multifunctional Bacterial Cellulose Nanofibers/Polypyrrole (PPy) Composite Films for Joule Heating and Electromagnetic Interference Shielding

Huo

Guo

Yang

et al. 2022

ACS Appl. Electron. Mater.

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Polypyrrole has attracted more and more attention due to its low density, high conductivity, and excellent electro/photothermal conversion ability. However, the poor mechanical properties of polypyrrole limit its further application. In this work, mechanically flexible bacterial cellulose nanofibers/polypyrrole (BC@PPy) composite films were fabricated by in situ polymerization and vacuum filtration. The addition of BC improved the mechanical properties of PPy and made it have good tensile and bending capacity. The conductivity of BC@PPy films could be tuned by the polymerization time of pyrrole. The BC@PPy-6 h film displayed excellent low-voltage-driven Joule heating (up to 95.4 °C at 5 V) and high-efficiency photothermal conversion (up to 52.4 °C under 100 mW/cm2) performance. Moreover, the resultant BC@PPy-6 h film also showed outstanding electromagnetic interference (EMI) shielding effectiveness of exceeding 28.5 dB in the whole X band. Therefore, the multifunctional BC@PPy films possess high application prospects in wearable electrical devices for Joule heating, photothermal conversion, and EMI shielding.

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Synthesis and EMI shielding studies of polyaniline grafted conducting nanohybrid

Cited by 14 publications

References 43 publications

Synthesis and Conductivity Studies of Poly(Methyl Methacrylate) (PMMA) by Co-Polymerization and Blending with Polyaniline (PANi)

Synthesis and Conductivity Studies of Poly(Methyl Methacrylate) (PMMA) by Co-Polymerization and Blending with Polyaniline (PANi)

Fabrication of DTC-g-PE-DA@GO@PU chelator for extraction of heavy metals from e-waste

Multifunctional Bacterial Cellulose Nanofibers/Polypyrrole (PPy) Composite Films for Joule Heating and Electromagnetic Interference Shielding

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