Physical properties of polyvinylidene fluoride/multi‐walled carbon nanotube nanocomposites with special reference to electromagnetic interference shielding effectiveness

Ram, Ranvijai; Khastgir, Dipak; Rahaman, Mostafizur

doi:10.1002/adv.22113

Cited by 29 publications

(13 citation statements)

References 64 publications

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“…These differences likely because of Raman spectroscopy's capacity to detect smaller shifts in interatomic vibrational frequency caused by the stress-induced changes in strain due to the presence of defects. However, these results demonstrate that both techniques are complementary to each other and are highly sensitive to small changes in the crystal structure [27].…”

Section: Resultsmentioning

confidence: 90%

Synthesis of activated carbon derived from chicken feather for Li-ion batteries through chemical and physical activation process

Hastuti

Subhan

Puspitasari

2021

Mater Renew Sustain Energy

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The use of activated carbon from biomass as an electrode for lithium-ion batteries is promising because of the low cost, natural abundance, and environmentally friendly. Chicken feather is a biomass that has the potential to be a source of activated carbon, because it contains keratin. The activation process affects the quality of activated carbon, thereby increasing battery performance. In this study, chicken feather waste was chemically activated using KOH and combined with physical activation at temperature variations of 750, 850 and 950 °C. The activation process significantly influenced electrochemical properties because of the difference in their microstructure. The activated carbon pyrolyzed at 850 °C (CFCA-850) shows the highest discharge capacity of 285.78 mAhg−1, good cycling stability and rate performance due to its higher interlayer spacing and large surface area. Furthermore, electronic conductivity and ion increase, thus improve battery performance.

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Section: Resultsmentioning

confidence: 90%

Synthesis of activated carbon derived from chicken feather for Li-ion batteries through chemical and physical activation process

Hastuti

Subhan

Puspitasari

2021

Mater Renew Sustain Energy

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“…The optimized concentration avoids any clustering of the added particles. When stress is applied, these clusters may initiate failure processes, which leads to a reduction in the strength of the composite [ 28 ]. The surface morphology and cross-section of the PVDF and hybrid PVDF/BT fibers show that they are very smooth and do not have any porosity or voids ( Figure 2 a–d).…”

Section: Resultsmentioning

confidence: 99%

Dynamic Mechanical and Creep Behaviour of Meltspun PVDF Nanocomposite Fibers

et al. 2021

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Piezoelectric fibers have an important role in wearable technology as energy generators and sensors. A series of hybrid nanocomposite piezoelectric fibers of polyinylidene fluoride (PVDF) loaded with barium–titanium oxide (BT) and reduced graphene oxide (rGO) were prepared via the melt spinning method. Our previous studies show that high-performance fibers with 84% of the electroactive β-phase in the PVDF generated a peak output voltage up to 1.3 V and a power density of 3 W kg−1. Herein, the dynamic mechanical and creep behavior of these fibers were investigated to evaluate their durability and piezoelectric performance. Dynamic mechanical analysis (DMA) was used to provide phenomenological information regarding the viscoelastic properties of the fibers in the longitudinal direction. DSC and SEM were employed to characterize the crystalline structure of the samples. The storage modulus and the loss tangent increased by increasing the frequency over the temperature range (−50 to 150 °C) for all of the fibers. The storage modulus of the PVDF/rGO nanocomposite fibers had a higher value (7.5 GPa) in comparison with other fibers. The creep and creep recovery behavior of the PVDF/nanofillers in the nanocomposite fibers have been explored in the linear viscoelastic region at three different temperatures (10–130 °C). In the PVDF/rGO nanocomposite fibers, strong sheet/matrix interfacial interaction restricted the mobility of the polymer chains, which led to a higher modulus at temperatures 60 and 130 °C.

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“…The physical properties of PVDF and N , N ‐dimethylformamide (DMF) are already described in previously published literature . There were three different types of PNC fillers, namely N472, N550 and N774, used for comparative study.…”

Section: Methodsmentioning

confidence: 99%

Electromagnetic interference shielding effectiveness and skin depth of poly(vinylidene fluoride)/particulate nano‐carbon filler composites: prediction of electrical conductivity and percolation threshold

Ram

Khastgir

Rahaman

2019

Polymer International

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The addition of various particulate nano-carbon (PNC) fillers to heat-resistant poly(vinylidene fluoride) (PVDF) was carried out to prepare conductive composites for use in electromagnetic interference (EMI) shielding application. Three different PNC fillers, namely N472 (Vulcan XC-72), N550 (Fast Extruding Furnace) and N774 (Semi-Reinforcing Furnace), were used in various concentrations to prepare composite systems PVDF/N472, PVDF/N550 and PVDF/N774 by solution casting followed by a moulding technique. These PNC fillers have a particle size at the nanometre level, but they have an aggregating tendency; both these characteristics influence the properties of composites to which such fillers are added. The percolation threshold of the PVDF/PNC composites was theoretically determined using the sigmoidal Boltzmann model and classical theory and compared. Theoretical models were also used to predict composition-dependent electrical conductivity. The electrical conductivity is correlated to that of EMI shielding effectiveness at ambient temperature.

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Physical properties of polyvinylidene fluoride/multi‐walled carbon nanotube nanocomposites with special reference to electromagnetic interference shielding effectiveness

Cited by 29 publications

References 64 publications

Synthesis of activated carbon derived from chicken feather for Li-ion batteries through chemical and physical activation process

Synthesis of activated carbon derived from chicken feather for Li-ion batteries through chemical and physical activation process

Dynamic Mechanical and Creep Behaviour of Meltspun PVDF Nanocomposite Fibers

Electromagnetic interference shielding effectiveness and skin depth of poly(vinylidene fluoride)/particulate nano‐carbon filler composites: prediction of electrical conductivity and percolation threshold

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