Toughening of graphene-based polymer nanocomposites via tuning chemical functionalization

Najafi, Farzin; Wang, Guorui; Mukherjee, Sankha; Cui, Teng; Filleter, Tobin; Singh, Chandra Veer

doi:10.1016/j.compscitech.2020.108140

Cited by 50 publications

(20 citation statements)

References 58 publications

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“…These produce stronger interfacial bonding between the PMMA bone cement matrix and the G surface, achieving superior mechanical properties by improving the interfacial load transfer. Some studies [ 45 , 46 ] demonstrated that this improvement in fatigue performance is due to the formation of stronger interfacial interactions that lead to an increase in energy absorbed caused by a transition in crack propagation mechanism (i.e., from interfacial slippage to crack arresting behaviour). Some simulations revealed that such a change in mechanism is caused by the formation of both hydrogen bond networks and physical entanglements at the interface [ 45 ].…”

Section: Resultsmentioning

confidence: 99%

Advanced G-MPS-PMMA Bone Cements: Influence of Graphene Silanisation on Fatigue Performance, Thermal Properties and Biocompatibility

et al. 2021

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The incorporation of well-dispersed graphene (G) powder to polymethyl methacrylate (PMMA) bone cement has been demonstrated as a promising solution to improving its mechanical performance. However, two crucial aspects limit the effectiveness of G as a reinforcing agent: (1) the poor dispersion and (2) the lack of strong interfacial bonds between G and the matrix of the bone cement. This work reports a successful functionalisation route to promote the homogenous dispersion of G via silanisation using 3-methacryloxypropyltrimethoxy silane (MPS). Furthermore, the effects of the silanisation on the mechanical, thermal and biocompatibility properties of bone cements are presented. In comparison with unsilanised G, the incorporation of silanised G (G_MPS1 and G_MPS2) increased the bending strength by 17%, bending modulus by 15% and deflection at failure by 17%. The most impressive results were obtained for the mechanical properties under fatigue loading, where the incorporation of G_MPS doubled the Fatigue Performance Index (I) value of unsilanised G-bone cement—meaning a 900% increase over the I value of the cement without G. Additionally, to ensure that the silanisation did not have a negative influence on other fundamental properties of bone cement, it was demonstrated that the thermal properties and biocompatibility were not negatively impacted—allowing its potential clinical progression.

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Section: Resultsmentioning

confidence: 99%

Advanced G-MPS-PMMA Bone Cements: Influence of Graphene Silanisation on Fatigue Performance, Thermal Properties and Biocompatibility

et al. 2021

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“…Moreover, the nanoscale 2D size allows GO to fill in the tiny cracks and voids between hydration products of cement, thus decreasing the porosity and improving the compactness [28]. Upon mechanical damage, GO sheets can provide toughening mechanism by triggering crack deflection, branching, and bridging, leading to an increased failure tolerance of GRCC [29,30]. One limitation for GO reinforcement is that the extensive defects account for the degradation of the mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Application of Graphene in Fiber-Reinforced Cementitious Composites: A Review

Qureshi

Wang

2021

Energies

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Graphene with fascinating properties has been deemed as an excellent reinforcement for cementitious composites, enabling construction materials to be smarter, stronger, and more durable. However, some challenges such as dispersion issues and high costs, hinder the direct incorporation of graphene-based reinforcement fillers into cementitious composites for industrial production. The combination of graphene with conventional fibers to reinforce cement hence appears as a more promising pathway especially towards the commercialization of graphene for cementitious materials. In this review paper, a critical and synthetical overview on recent research findings of the implementation of graphene in fiber-reinforced cementitious composites was conducted. The preparation and characterization methods of hybrid graphene-fiber fillers are first introduced. Mechanical reinforcing mechanisms are subsequently summarized, highlighting the main contribution of nucleation effect, filling effect, interfacial bonding effect, and toughening effect. The review further presents in detail the enhancements of multifunctional properties of graphene-fiber reinforced cementitious composites, involving the interfacial properties, mechanical properties, durability, electrical conductivity, and electromagnetic interference shielding. The main challenges and future prospects are finally discussed to provide constructive ideas and guidance to assist with relevant studies in future.

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“…They have attracted much attention due to the outstanding mechanical, optical, electrical, and catalytic, properties displayed by nanocomposites. [9,10] Different types of nanoparticles such as Al 2 O 3 , [11][12][13][14] SiO 2 , [15,16] TiO 2 , [4,[17][18][19][20][21][22][23] carbon nanotube (CNT), [24][25][26][27][28][29][30] graphene, [31][32][33][34] graphene oxide (GO), [35][36][37][38][39] clay, [40,41] and many organic fillers [42,43] have been adopted to disperse in matrix to obtain nanocomposites. For example, Blond et al [23] studied the influence of multi-walled CNTs on the elastic modulus, strength, and toughness properties on poly-Methylmethacrylate (PMMA) composites.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and mechanical properties of TiO₂ polymer‐matrix nanocomposite and its 3D woven composite

et al. 2021

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The present work aims to study the effect of nano-TiO 2 modified epoxy on the tension, compression, and fracture toughness properties of nano-doped polymer (NP) and nano-doped 3D woven (NW) composites. Nanoparticles are dispersed into epoxy using high-speed shear mixing and ultrasonication processes. Vacuum-assisted resin infusion molding process is utilized to prepare the woven composites. The results indicate that nanoparticle addition can

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Toughening of graphene-based polymer nanocomposites via tuning chemical functionalization

Cited by 50 publications

References 58 publications

Advanced G-MPS-PMMA Bone Cements: Influence of Graphene Silanisation on Fatigue Performance, Thermal Properties and Biocompatibility

Advanced G-MPS-PMMA Bone Cements: Influence of Graphene Silanisation on Fatigue Performance, Thermal Properties and Biocompatibility

Application of Graphene in Fiber-Reinforced Cementitious Composites: A Review

Fabrication and mechanical properties of TiO₂ polymer‐matrix nanocomposite and its 3D woven composite

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Toughening of graphene-based polymer nanocomposites via tuning chemical functionalization

Cited by 50 publications

References 58 publications

Advanced G-MPS-PMMA Bone Cements: Influence of Graphene Silanisation on Fatigue Performance, Thermal Properties and Biocompatibility

Advanced G-MPS-PMMA Bone Cements: Influence of Graphene Silanisation on Fatigue Performance, Thermal Properties and Biocompatibility

Application of Graphene in Fiber-Reinforced Cementitious Composites: A Review

Fabrication and mechanical properties of TiO2 polymer‐matrix nanocomposite and its 3D woven composite

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Fabrication and mechanical properties of TiO₂ polymer‐matrix nanocomposite and its 3D woven composite