A new method for preparation of functionalized graphene and its epoxy nanocomposites

Naeem, Mohannad; Kuan, Hsu‐Chiang; Michelmore, Andrew; Meng, Qingshi; Qiu, Aidong; Aakyiir, Mathias; Lošić, Dušan; Zhu, Shenmin; Ma, Jun

doi:10.1016/j.compositesb.2020.108096

Cited by 50 publications

(27 citation statements)

References 81 publications

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“…Other possible functional modifications on CNTs and graphene oxide surfaces include grafting of alkyl chains [ 96 ], polystyrene sulfonate, aminostyrene [ 97 ], zinc oxide [ 98 , 99 ], thiols [ 21 , 30 ], and thiol-ended hyperbranched polymers [ 31 ]. Alternative chemical methods that involve the use of non-toxic solvents or a bio-approach have also been proposed [ 100 , 101 , 102 , 103 , 104 , 105 ]. The modification of the MXenes surface can be achieved by the creation of thermally stable oxygen functional groups, able to assure interfacial adhesion with the epoxy matrix [ 50 ].…”

Section: Production Of Nanocompositesmentioning

confidence: 99%

“…The presence of uniformly dispersed nanofillers is, once again, a basic requirement [101] and a critical loading, the so-called electrical percolation threshold (Figure 10), is needed to obtain electrical conductivity [9,15,17,109,110,127,139,143,144]. The percolation threshold is usually achieved using 0.5-1 wt.% loads of nanofiller, but nanoparticles' functionalization can further decrease the required loading content [100,102]. The addition of nanofillers to epoxy resins enhance the thermal stability of the material.…”

Section: Properties Of the Epoxy Nanocompositesmentioning

confidence: 99%

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Recent Advances and Trends of Nanofilled/Nanostructured Epoxies

Frigione

Lettieri

2020

Materials

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This paper aims at reviewing the works published in the last five years (2016–2020) on polymer nanocomposites based on epoxy resins. The different nanofillers successfully added to epoxies to enhance some of their characteristics, in relation to the nature and the feature of each nanofiller, are illustrated. The organic–inorganic hybrid nanostructured epoxies are also introduced and their strong potential in many applications has been highlighted. The different methods and routes employed for the production of nanofilled/nanostructured epoxies are described. A discussion of the main properties and final performance, which comprise durability, of epoxy nanocomposites, depending on chemical nature, shape, and size of nanoparticles and on their distribution, is presented. It is also shown why an efficient uniform dispersion of the nanofillers in the epoxy matrix, along with strong interfacial interactions with the polymeric network, will guarantee the success of the application for which the nanocomposite is proposed. The mechanisms yielding to the improved properties in comparison to the neat polymer are illustrated. The most important applications in which these new materials can better exploit their uniqueness are finally presented, also evidencing the aspects that limit a wider diffusion.

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Section: Production Of Nanocompositesmentioning

confidence: 99%

Section: Properties Of the Epoxy Nanocompositesmentioning

confidence: 99%

Recent Advances and Trends of Nanofilled/Nanostructured Epoxies

Frigione

Lettieri

2020

Materials

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“…Results revealed that the addition of graphene increases the fracture toughness and stiffness of matrix material up to 78.41% and 16.29%. Usage of graphene up to 0.25 vol.% improves its glass transition temperature [46]. Based on a clear-cut literature survey, the addition of graphene and MMT improvises the basic and functional properties of the polymer.…”

Section: Introductionmentioning

confidence: 99%

Application of r-GO-MMT Hybrid Nanofillers for Improving Strength and Flame Retardancy of Epoxy/Glass Fibre Composites

Kavimani

Stalin²,

Gopal

et al. 2021

Advances in Polymer Technology

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The application of nanomaterials as a strengthening agent in the fabrication of polymer nanocomposites has gained significant attention due to distinctive properties which can be utilised in structural applications. In this study, reduced graphene oxide (r-GO) and montmorillonite (MMT) nanoclay were used as filler materials to fabricate hybrid epoxy-based nanocomposites. The synergistic effect of nanomaterials on flammability and mechanical behaviour of nanocomposites were studied. Results revealed that the addition of nanofiller showcases 97% and 44.5% improvement in tensile and flexural strength. However, an increment in the percentage of filler material over 0.3% exhibits a decremental mechanical property trend. Likewise, the addition of nanofiller increases the nonignition timing of the glass-fibre-reinforced epoxy composites. Fracture surface morphology displays the occurrence of the ductile fracture mechanism owing to the presence of hybrid fillers.

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“…The sp 2 hybridized carbon of graphene layers represents the exceptional Young’s modulus of one Tera Pascal (TPa) , which contains approximately 200 times greater breaking strength compared to steel. This has encouraged the exploration of this material’s mechanical strength by inducing as a filler in polymers [ 8 , 9 , 10 ]. The fast growing interest of researchers has developed numerous fabrication techniques for graphene-based polymer composites including melt mixing, solvent assisted casting/coating methods, extrusion techniques and electrospinning, etc.…”

Section: Introductionmentioning

confidence: 99%

Influence of Graphene Oxide Contents on Mechanical Behavior of Polyurethane Composites Fabricated with Different Diisocyanates

et al. 2021

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The exceptional behavior of graphene has not yet been entirely implicit in the polymer matrix. To explore this fact in the present work, two series of Polyurethan (PU) composites were synthesized. The structural modification was observed by the use of two different diisocyanate of methylene diisocyanate (MDI) and hexamethylene diisocyanate (HMDI) in hydroxylterminated polybutadiene (HTPB) by using I,4 Butane diol (BD) as the chain extender. The variation in hard segment up to 25 (wt.%) in both series led to significant changes in the mechanical behavior of graphene oxide (GO) induced composites. Both series were prepared by an in situ polymerization process. Fourier transform infrared (FTIR) analysis showed a peak in the region of 1700 cm−1, which confirmed the conversion of the NCO group into urethane linkages. Thermal gravimetric analysis (TGA) revealed a thermal stability up to 450 °C @ 90% weight loss. The swelling behavior showed the optimum uptake of 30% of water and 40% of dimethyl sulfoxide (DMSO) with aliphatic diisocyanate. The values of storage modulus (E′), complex modulus (E*), and compliance complex (D*) were observed up to 7 MPa, 8 Mpa, and 0.7 MPa−1, respectively. The degree of entanglement (N) values were calculated from DMA and were found in the range of 1.7 × 10−4 (mol/m3). Phase segregation of PU was observed by scanning electron microscopy (SEM), elucidating the morphology of composites.

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A new method for preparation of functionalized graphene and its epoxy nanocomposites

Cited by 50 publications

References 81 publications

Recent Advances and Trends of Nanofilled/Nanostructured Epoxies

Recent Advances and Trends of Nanofilled/Nanostructured Epoxies

Application of r-GO-MMT Hybrid Nanofillers for Improving Strength and Flame Retardancy of Epoxy/Glass Fibre Composites

Influence of Graphene Oxide Contents on Mechanical Behavior of Polyurethane Composites Fabricated with Different Diisocyanates

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