Self-assembled fabrication and flame-retardant properties of reduced graphene oxide/waterborne polyurethane nanocomposites

Hu, Jing; Zhang, Feng

doi:10.1007/s10973-014-4078-7

Cited by 51 publications

(29 citation statements)

References 25 publications

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“…In general, elongation at break always dramatically decreases with the increasing amount of fillers. [44][45][46] However, in this study, the elongation at break decreases slightly. For example, the elongation at break decreased by only 8.6% as the loading of NH 2 -RGO in WPU matrix is 1.0 wt%.…”

Section: Mechanical and Thermal Properties Of Nh 2 -Rgo/ Wpu Nanocompcontrasting

confidence: 65%

Preparation and properties of amine-functionalized reduced graphene oxide/waterborne polyurethane nanocomposites

Shi

Zhang

2015

High Performance Polymers

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Amine-functionalized reduced graphene oxide (NH 2 -RGO), with primary amine (-NH 2 ) groups linked onto surfaces by toluene-2,4-diisocynate), was successfully synthesized. Subsequently, the as-prepared NH 2 -RGO nanoplatelets were covalently incorporated into a waterborne polyurethane (WPU) matrix to fabricate NH 2 -RGO/WPU nanocomposites by the reaction of -NH 2 groups with the isocyanate-terminated polyurethane prepolymer. Electron microscopic observations confirmed that the NH 2 -RGO nanoplatelets were homogenously dispersed in the WPU matrix. The NH 2 -RGO/ WPU nanocomposites exhibited a significant improvement in their mechanical and thermal properties. The tensile strength and storage modulus of the nanocomposites increased by 73% and 973%, respectively, with the addition of 1.0 wt% NH 2 -RGO. The thermal degradation temperature was enhanced by about 40 C compared with the neat WPU. Meanwhile, the thermal conductivity increased by about 258%.

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Section: Mechanical and Thermal Properties Of Nh 2 -Rgo/ Wpu Nanocompcontrasting

confidence: 65%

Preparation and properties of amine-functionalized reduced graphene oxide/waterborne polyurethane nanocomposites

Shi

Zhang

2015

High Performance Polymers

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“…The carbon skeleton of graphene and GO has a high thermal stability and can act as a template for char and promote the formation of multiple and overlapped char via the so-called ''labyrinth effect''. As a result, a 'tortuous path' is provided to increase the exchanging pathway of heat and mass between gaseous and condensed phases in association with the improvement in the thermal stability and fire safety of polymers [20][21][22][23][24][25][26][27]. Second, graphene and GO have a large specific surface area and can effectively adsorb flammable organic volatiles or hinder their release and diffusion during combustion; they also can provide a catalytic and carbonization platform for other materials like metallic oxide [23,[28][29][30][31][32].…”

Section: Graphene and Graphene Oxide Flame Retardantsmentioning

confidence: 99%

Graphene-based flame retardants: a review

Sang

et al. 2016

J Mater Sci

179

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Graphene and its derivatives are potential flame retardant materials with good flame retardant performance; in particular, graphene as an adjuvant in combination with inorganic nanomaterials may be a promising candidate of flame retardant. This review describes the flame retardant mechanism, the development trend, and the classification of graphene-based flame retardants. It points out that graphene has attracted intensive interests in the fields of electronics, energy, and information, due to its excellent properties such as high thermal conductivity, good electron transport ability, and large specific surface area. In the meantime, graphene can change the pyrolysis as well as the thermal conductivity, heat absorption, viscosity and dripping of polymer during the combustion process. In other words, graphene can improve the thermal stability of polymer and delay its ignition, and it can also inhibit fire from spreading and reduce heat release rate.

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“…The modification of GO with isophore diidocyanate (IPDI) and octadecylamine (ODA) [23], titane coupling agent [24], 3-aminopropyl triethoxysilane (APTES) [25,26], and hydramines (MEA-monorthanolamine, DEA-diethanolamine and TEA-triethylamine) [27] has been reported to improve the compatibly with a WPU matrix. The applications of graphene (pristine, oxidized, or functionalized)/WPU composites as electromagnetic interference (EMI) shielding devices [28][29][30][31][32], textiles [33,34], anticorrosives [24,[35][36][37][38], and flame retardant coatings [39] have also been studied.…”

Section: Introductionmentioning

confidence: 99%

Composite Films of Waterborne Polyurethane and Few-Layer Graphene—Enhancing Barrier, Mechanical, and Electrical Properties

Cunha

Paiva

2019

J. Compos. Sci.

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Graphene has excellent mechanical, thermal, and electrical properties. Graphene can serve as potential reinforcement in polymer-based nanocomposites. In order to achieve this goal, graphene has to be distributed homogeneously and dispersed throughout the polymer matrix, establishing a strong interface with the polymer. Solution mixing is an interesting method for the preparation of homogeneous nanocomposites, in particular when using environmentally friendly solvents such as water. The major difficulty met in the production of graphene/polymer composites concerns the preparation and stabilization of graphene in aqueous suspension. In the present work three different graphite-based materials, with different crystallinity and purity grades, were exfoliated in aqueous solution of an amphiphilic pyrene derivative, forming few-layer graphene (FLG). The FLG prepared was dispersed in waterborne polyurethane (WPU) to produce composite films. The composite films were produced by solvent casting and spray coating, forming free-standing films that were characterized in terms of its distribution of FLG through the composite, its permeability to water vapor, its electrical resistivity, and its mechanical properties. The studies demonstrated the influence of different factors on the composite film properties such as the use of graphite vs. FLG, the FLG lateral dimensions, and the FLG composition and composite preparation method.

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Self-assembled fabrication and flame-retardant properties of reduced graphene oxide/waterborne polyurethane nanocomposites

Cited by 51 publications

References 25 publications

Preparation and properties of amine-functionalized reduced graphene oxide/waterborne polyurethane nanocomposites

Preparation and properties of amine-functionalized reduced graphene oxide/waterborne polyurethane nanocomposites

Graphene-based flame retardants: a review

Composite Films of Waterborne Polyurethane and Few-Layer Graphene—Enhancing Barrier, Mechanical, and Electrical Properties

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