Effect of reinforcement on the barrier and dielectric properties of epoxidized natural rubber–graphene nanocomposites

In the present study, graphene oxide (GO) was incorporated into poly(vinylidene fluoride) (PVDF) and chemically modified PVDF (M-PVDF) to prepare mixed matrix membranes (MMMs) for gas separation application. Performed analyses proved appropriate dispersion of exfoliated GO sheets in polymer matrices and sufficient compatibility at the interfacial phases. M-PVDF based MMMs were thermally and mechanically more stable relative to the PVDF-based MMMs. The oxygen containing functional groups in M-PVDF was probably the main reason for this more stability. PVDF/GO MMMs rendered low gas permeability and high selectivity. Both impermeable GO sheets and crystalline phases of PVDF were responsible for such behavior. On the other hand, interestingly gas permeability of M-PVDF/GO MMMs was enhanced while no substantial decline was recorded in gas selectivity. For instance, He and CO 2 permeability was increased 12.46% and 25.89%, respectively, compared to the pure PVDF membrane. This behavior originated from functional groups of M-PVDF and the interaction of these groups with GO sheets. Since GO often amplified gas barrier properties of polymers, such increscent would be appreciable.

Section: Introductionmentioning

confidence: 99%

Effective gas separation through graphene oxide containing mixed matrix membranes

Feijani

Tavassoli

Mahdavi

et al. 2018

“…Here, RGO upturns the tortuosity of the solvent transport route and lessens the quantity of solvent that can be diffuse in a given volume of the composite. Moreover, constraint in local motion and flexibility of the rubber molecules by filler incorporation tends to reduced solvent uptake . Even of distribution of RGO in CR resulted in decrement free volume within the matrix which further enhances its solvent resistance behavior.…”

Section: Resultsmentioning

confidence: 99%

“…Last few years, several studies were reported in solvent transport characteristics of polymer nanocomposites. Diffusion of organic solvents through a number of systems such as, SBR/carbon nanotube nanocomposites, SBR–poly(methyl methacrylate) interpenetrating polymer network membranes EVA/halloysite nanotubes, fluoroelastomer/reduced graphene oxide (FKM/RGO) nanocomposites, and epoxidized NR/graphene nanocomposites revealed the characteristic transport properties of the nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Exploring the filler–polymer interaction and solvent transport behavior of nanocomposites derived from reduced graphene oxide and polychloroprene rubber

Maya

Abraham²,

George³

et al. 2019

Self Cite

Aliphatic solvent resistance of polychloroprene rubber (CR) reinforced reduced graphene oxide (RGO) nanocomposites were explored in the temperature range of 30–50 °C using hexane, heptane, and octane. Microstructure‐assisted solvent resistant property is evident from transmission electron microscopy images of fabricated composites. Different transport parameters such as diffusion, permeation, and sorption constants were moderate while increasing RGO content. Diffusion mechanism was explained based on the permeating molecule and is found to be close to Fickian mechanism except for heptane. Evaluation of kinetic and thermodynamic parameters shows the ability of nanoreinforcement to alter thermodynamic characteristics and rate constant values. The extent of reinforcement was also evaluated by Kraus equation. From swelling studies, molecular mass between crosslinks was evaluated using Flory–Rehner equation and compared these values with theoretical predictions such as phantom and affine models to analyze the deformation and mobility of the network during swelling. Temperature plays a significant role in the transport of organic solvent through CR/RGO nanocomposites. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48168.

“…Due to the polar groups in the ENR, the interfacial interaction in between the graphene oxide and rubber increases. Yaragalla et al . also studied the effect of variation of the ENR epoxidation level (25% and 50%) on the ENR/GO nanocomposite.…”

Section: Sustainable Rubber Additivesmentioning

confidence: 99%

Sustainable rubbers and rubber additives

Sarkar

Bhowmick

2017

Rubber is one of the most versatile materials having myriad of applications-from niche rubber band and eraser to highly engineered spacecraft seal. Of late, the glittering concept of "sustainability" has been able to infiltrate within the domain of elastomer science and technology to a significant extent -in both academia and industry. This fervent context thus necessitates a systematic documentation of brief history, present research scenario and future perspective of sustainable developments in this field. The present review aims to portray a panoramic sketch of various sustainable rubbers and functional rubber additives in this field and intends to provide a direction to their plausible future developments.