Influence of Interface on epoxy/clay Nanocomposites: 2. Mechanical and Thermal Dynamic Properties

Zaman, Izzuddin; Nor, Fethma M.; Manshoor, Bukhari; Khalid, Amir; Araby, Sherif

doi:10.1016/j.promfg.2015.07.005

Cited by 21 publications

(16 citation statements)

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“…Similar increases in the Tg were observed for the nanocomposites produced with an epoxy and different types of modified graphene. However, it is important to note that graphene fillers possessed a similar tendency to increase the glass transition temperature in the case of the materials [38,39].…”

Section: Thermal Propertiesmentioning

confidence: 95%

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Elaboration of properties of graphene oxide reinforced epoxy nanocomposites

Bari

Khan

Njuguna³

et al. 2017

Int J Plast Technol

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In this research work, properties of graphene oxide (GO) based epoxy nanocomposites, prepared via the solution blending method, are elaborated. Different loadings (0.1-0.5 wt%) of GO were added into epoxy resin, and their effects were studied on their surface reaction, morphology, mechanical and thermal properties. It was found that a chemical modification, layer expansion and dispersion of filler within the epoxy matrix resulted in an improved interface bonding between the GO and epoxy matrix. The optimum amount of graphene nanostructures can be useful to improve the properties of epoxy nanocomposites for applications in adhesives to automotive.

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Section: Thermal Propertiesmentioning

confidence: 95%

“…Ribeiro et al [38] studied the glass transition improvement in grapheneepoxy composites. Multi-nanostructured (clay and graphene platelets) reinforced epoxy nanocomposites have been also studied by Zaman et al [39]. Mechanical and thermal properties of epoxy composites containing GO and liquid crystalline epoxy have also been studied [40].…”

Section: Introductionmentioning

confidence: 99%

Elaboration of properties of graphene oxide reinforced epoxy nanocomposites

Bari

Khan

Njuguna³

et al. 2017

Int J Plast Technol

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“…The addition of nanoparticles such as graphene, graphene oxide, carbon nanotubes, and nanosilica could improve toughness and mechanical properties, thermal stability, and anticorrosion properties of ER . Carolan et al .…”

Section: Introductionmentioning

confidence: 99%

Investigation of the mechanical, thermal, and anticorrosion properties of epoxy nanocomposite coatings: Effect of synthetic hardener and nanoporous graphene

Naderi

Hoseinabadi

Najafi

et al. 2018

J of Applied Polymer Sci

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In the present study, epoxy samples containing nanoporous graphene (NPG) were synthesized and analyzed in terms of mechanical, morphological, thermal, adhesion, and anticorrosion properties. To this end, the employed curing agents (hardeners) were synthesized and NPG content was varied from 0 to 1 wt %. By using a hardener with aliphatic side chains, the toughness of the nanocomposite was improved without a decrease in the modulus. Adding 1 wt % NPG increased the modulus of the nanocomposite by about 30%. The dynamic mechanical results showed an increment in the glass transition of the samples containing 1 wt % NPG. Field emission scanning electron microscopy images were used to observe the fracture surface of the nanocomposites. The thermogravimetric analysis analysis also confirmed that using synthetic hardener and NPG as the nanofiller enhanced the thermal resistance of the samples. The images of the protected metal panel surfaces and their coatings were used to study adhesion and anticorrosion properties. These results indicated that the hardener synthesized in this work along with NPG improved the mechanical, thermal, adhesion, and anticorrosion properties of the epoxy nanocomposites effectively. The specific characteristic of the synthetic hardener was its chemical structure including both aliphatic and cyclic polyamines as the side groups. V C 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46201.

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“…Figure 3c shows the resistance curve (Rcurve) of E-GS-IV nanocomposite,f rom which the fracture toughness (K JC )i sc alculated to be about 2.9 MPa m 1/2 .T his fracture toughness is about 4.2 times higher than that of pure epoxy,a nd the calculated energy reaches up to about 3551.0 Jm À2 ,w hich is about 17.5 times higher than that of pure epoxy.T he fracture morphology of pure epoxy shows as mooth surface that cannot resist crack propagation, thus yielding ab rittle fracture ( Supporting Information, Figure S4a). Ther atios of K IC (nanocomposites) to K IC (epoxy) range from 1.0 to 2.5 due to the poor dispersion and homogeneous structure of epoxy nanocomposites reinforced with nanofillers,such as functionalized GO, [10] modified graphene, [11] carbon nanofibers (CNFs), [12] carbon nanotubes (CNTs), [13] and clay [14] (the corresponding abbreviations of the specific nanofillers are listed in the Supporting Information, Table S1). Thef ractography of the inverse artificial nacres shows layered structures with different thicknesses of epoxy layers.T he thinner the epoxy layers are,the longer the crack propagation path is,which alleviates high local stresses,d issipates more energy,a nd confers excellent fracture toughness to the inverse artificial nacres (Supporting Information, Figure S4c-f).…”

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confidence: 99%

Ultra‐Tough Inverse Artificial Nacre Based on Epoxy‐Graphene by Freeze‐Casting

et al. 2019

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Epoxy nanocomposites combining high toughness with advantageous functional properties are needed in many fields.H owever,f abricating high-performance homogeneous epoxy nanocomposites with traditional methods remains ag reat challenge.N acre with outstanding fracture toughness presents an ideal blueprint for the development of future epoxy nanocomposites.Now,high-performance epoxy-graphene layered nanocomposites were demonstrated with ultrahigh toughness and temperature-sensing properties.T hese nanocomposites are composed of ca. 99 wt %o rganic epoxy,w hich is in contrast to the composition of natural nacre (ca. 96 wt % inorganic aragonite). These nanocomposites are named an inverse artificial nacre.T he fracture toughness reaches about 4.2 times higher than that of pure epoxy.T he electrical resistance is temperature-sensitive and stable under various humidity conditions.T his strategy opens an avenue for fabricating high-performance epoxy nanocomposites with functional properties.Ultra-tough and functional epoxy nanocomposites are urgently needed in many engineering areas,s uch as aerospace,b uilding design, transportation, electronics,a nd many others. [1] Thet raditional methods for toughening epoxy matrix, such as solution mixing,m elt blending,a nd in situ polymerization, usually aim to homogeneously disperse the reinforcements of nanomaterials into an epoxy matrix, which are not very successful in obtaining high-performance epoxy nanocomposites. [2] Thet raditional toughening methods are not amenable to tailoring and optimizing the structure of epoxy nanocomposites.Achallenge then remains to develop an ovel approach for constructing high-performance epoxy nanocomposites.N atural nacre,w ith its brick-and-mortar structure consisting of about 96 wt %inorganic aragonite and about 4wt% biopolymer,e xhibits excellent fracture toughness about three orders of magnitude higher than aragonite, [3] providing ab iomimetic inspiration for constructing highperformance materials. [4] Freeze-casting,a lso known as ice templating, is ap romising technique to fabricate composites with three-dimensional (3D) hierarchical architecture,such as nacre-like ceramics, [5] cellular polymeric composites, [6] honeycomb fibers aerogels, [7] graphene aerogels, [8] and self-healing composites. [9] Inspired by the brick-and-mortar structure of nacre,w e fabricated nacre-like epoxy nanocomposites via freeze-casting. Ther esultant nacre-like epoxy nanocomposites are composed of about 99 wt %o rganic epoxy resin. This is the opposite of natural nacresc omposition of about 96 wt % inorganic aragonite.W ec all this kind of nacre-like epoxygraphene nanocomposite as an inverse artificial nacre.T he fracture toughness reaches up to about 4.2 times higher than that of pure epoxy,which is attributed to the synergistic effect from various toughening mechanisms,s uch as crack deflection, crack branching,i nterfacial fiction, and crack bridging. Furthermore,t his inverse artificial nacre shows anisotropic electrical conductivity owing to the lamell...

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Influence of Interface on epoxy/clay Nanocomposites: 2. Mechanical and Thermal Dynamic Properties

Cited by 21 publications

References 0 publications

Elaboration of properties of graphene oxide reinforced epoxy nanocomposites

Elaboration of properties of graphene oxide reinforced epoxy nanocomposites

Investigation of the mechanical, thermal, and anticorrosion properties of epoxy nanocomposite coatings: Effect of synthetic hardener and nanoporous graphene

Ultra‐Tough Inverse Artificial Nacre Based on Epoxy‐Graphene by Freeze‐Casting

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