Electrical Properties of Poly(Monomethyl Itaconate)/Few-Layer Functionalized Graphene Oxide/Lithium Ion Nanocomposites

Abstract

Poly(monomethyl itaconate) is outstanding because it is a glassy and dielectric polymer obtained from sustainable feedstock. Consequently, the study of the properties of its nanocomposites has gained importance. Herein, the electrical properties of nanocomposites based on poly(monomethyl itaconate) and functionalized few-layer graphene oxide (FGO) in the presence and absence of lithium ions (Li+) are studied. Not only did the electrical conductivities of the nanocomposites present values as high as 10−5 Scm−1, but also the dielectric permittivity of nanocomposites with (FGO) content lower than the percolation threshold was twice that of the pristine polymer, without presenting a drastic increase of the loss tangent. By contrast, nanocomposites containing Li+ ions presented significant increases of the permittivity with concomitant increases of the loss tangent. Moreover, it was determined that the presence of Li+ ions influenced the charge transport in the composites because of its ionic nature.

High performance fluoroelastomer composites filled with graphite and/or bismuth oxide for applications in gamma‐ray shielding

“…It is possible to observe that the electrical conductivity of FKM obeys the Jonscher's power law (Equation ). where σ 0 corresponds to the D.C.‐conductivity of the sample; 𝐴𝜔 𝑠 is the pure dispersive component of the A.C.‐conductivity, being a power law in terms of angular frequency ω and exponent s (0 < s ≤ 1), which is the degree of interaction between mobile charges and the molecular environment around them. A is a constant associated with the polarizability strength 26 . In this respect, the electrical conductivity of the FKM showed a linear increase with the frequency, and the conductivity of 6.16 × 10 −11 S/cm, registered at 0.1 Hz (Table 6), which indicates the insulating characteristic of FKM, and this value is comparable to that reported in the literature 27 .…”

“…A is a constant associated with the polarizability strength. 26 In this respect, the electrical conductivity of the FKM showed a linear increase with the frequency, and the conductivity of 6.16 Â 10 À11 S/cm, registered at 0.1 Hz (Table 6), which indicates the insulating characteristic of FKM, and this value is comparable to that reported in the literature. 27 In the case of the FKM/G composite, the electrical conductivity, registered at 0.1 Hz, reaches 3.36 Â 10 À6 S/cm, which corresponds to an increase of five orders of magnitude.…”

Electrical Properties of Polyetherimide-Based Nanocomposites Filled with Reduced Graphene Oxide and Graphene Oxide-Barium Titanate-Based Hybrid Nanoparticles

“…It was observed that the electrical conductivity of PEI increased dramatically by adding 10 wt.% GO-g-PMMI/BTN+10 wt.% rGO (σ’ = 1 × 10 −5 S/cm, recorded at ν = 10 −1 Hz) followed by the nanocomposite filled with 10 wt.% rGO (σ’ = 1 × 10 −7 S/cm, recorded at ν = 10 −1 Hz), where in both cases the conductivity behavior was independent of the frequency. This indicates that the charge transport is favored by the presence of graphene material [ 33 ]. Contrary to the nanocomposite filled only with GO-g-PMMI/BTN, which presented an electrical conductivity close to the conductivity of the polymeric matrix (σ’ = 1 × 10 −15 S/cm, recorded at ν = 10 −1 Hz) and the behavior of its conductivity increased with increasing frequency (σ’ = 1 × 10 −8 S/cm, recorded at ν = 10 6 Hz).…”

Study of the Influence of Magnetite Nanoparticles Supported on Thermally Reduced Graphene Oxide as Filler on the Mechanical and Magnetic Properties of Polypropylene and Polylactic Acid Nanocomposites

“…As known, one of the most widely used nanomaterials as fillers is graphene, due to its diversity of properties, such as its high surface area of 2630 m 2 ·g −1 and high mechanical properties of 1300 GPa [ 6 ]. In this respect, the high surface area of graphene allows for use in a wide range of multiple purposes, such as elastomers, thermoplastic, sustainable glassy nanocomposites [ 7 , 8 , 9 ] as well as hydrogel-based nanocomposites for environmental remediation, heavy metal absorption, and waste treatment [ 10 , 11 , 12 ]. Moreover, the high surface area of graphene allows hosting on its surface different nanomaterials which specific properties, such as magnetic properties [ 13 ].…”