Highly dispersed graphene oxide electrodeposited carbon fiber reinforced cement-based materials with enhanced mechanical properties

Lu, Zeyu; Hanif, Asad; Sun, Guoxing; Liang, Rui; Parthasarathy, P. R.; Li, Zongjin

doi:10.1016/j.cemconcomp.2018.01.006

Cited by 127 publications

(41 citation statements)

References 31 publications

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“…Other than that, these physical connections are preferred to improve the irregular crosslinking points and broad distributions of polymer chain lengths via covalent crosslink by MBA. Notably, it was extensive reported that divalent and trivalent ions, like Mg 2+ , Ca 2+ , Cu 2+ , Pb 2+ , Fe 3+ , Cr 3+ , can lead to the agglomeration of the adjacent GS layers by promoting the formation of coordinations . Therefore, Polycarboxylate‐ether (PCE) as a dispersion agent was added into the hybrid, so as to resist the divalent coordination and improve the dispersion of GS.…”

Section: Introductionmentioning

confidence: 99%

Highly Dispersed Graphene Network Achieved by using a Nanoparticle‐Crosslinked Polymer to Create a Sensitive Conductive Sensor

Wang¹,

Li²,

Lu³

et al. 2019

ChemElectroChem

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Electrically conductive hydrogels (ECHs) have attracted significant interest in the past, owing to their potential applications in flexible electronic devices. The incorporation of reduced graphene sheets (GSs) is one effective way to endow hydrogels with electrical conductivity. However, inhomogeneous distribution of GSs in a hydrogel matrix has a side effect on the conductivity for GS-based ECHs. In this work, cement-released calcium hydroxide nanospherulites (CNSs) are innovatively employed to help disperse GSs in a poly-acrylamide (PAM) hydrogel matrix. An excellent ECH with good mechanical performance is achieved by dispersing GSs homogeneously into the PAM hydrogel matrix with the support of CNSs. Raman measurements confirm the vital role of CNSs in dispersing GSs homogeneously into the hydrogel matrix. With a very low GS content of 0.2 wt %, the electrical conductivity of such ECH sample can reach four times than that of reported GS-based conductive hydrogels dispersed by conventional surfactants. Furthermore, the homogeneous distribution of GSs in the hydrogel matrix also promotes energy dissipation in the mechanical property, leading to a high compression stress (214 MPa) and stretching stress (325 KPa) for such ECHs. Owing to its rapid response speed and high stability, this ECH is used as a strain sensor to monitor deformation. In a broader context, this ECH material may have potential applications in smart sensors and wearable devices. remarkable with and the high recoverability of sensor could avoid the residual strain and achieve the instantaneous sensitivity (Figure 7 b).

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Section: Introductionmentioning

confidence: 99%

Highly Dispersed Graphene Network Achieved by using a Nanoparticle‐Crosslinked Polymer to Create a Sensitive Conductive Sensor

Wang¹,

Li²,

Lu³

et al. 2019

ChemElectroChem

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“…In [108], the results of XRD and FTIR testing indicated that GO sheets promote cement hydration since the water molecules on the GO surface provide a reservoir of water and transport channels for further hydration. Cement hydrates grown on GO/CNFs hybrid fibers have also been reported [109].…”

Section: Improvement In the Hydration Reactionmentioning

confidence: 93%

“…OPC reinforced with only 0.05 wt.% CNTs gave an increase of 6.4% in the compressive strength and 10.1% in the flexural strength, and OPC reinforced only with 0.05 wt.% GO showed increases of 11.0% in the compressive strength and 16.2% in the flexural strength. In another study [109], the co-effects of CNFs and GO on the mechanical properties of cement were investigated, and the results showed that the addition of 1.0 wt.% CNFs increased the compressive and flexural strengths of cement by 20.8% and 18.6%, respectively, while replacing half of the CNFs with GO gave increases in the compressive and flexural strengths of about 31.6% and 39.8%, respectively. This is thought to be at least partially because that GO worked as an extra surfactant to improve the dispersion of CNTs in the matrices [86].…”

Section: Improvement In Mechanical Properties and Relevant Mechanismsmentioning

confidence: 99%

Carbon nanomaterials enhanced cement-based composites: advances and challenges

Jing

Gao

et al. 2020

Nanotechnology Reviews

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AbstractCarbon nanomaterials, predominantly carbon nanofibers, carbon nanotubes, graphene, graphene nanoplates, graphene oxide and reduced graphene oxide, possess superior chemical, physical and mechanical properties. They have been successfully introduced into ordinary Portland cement to give enhancements in terms of mechanical properties, durability and electrical/thermal conductivity, and to modify the functional properties, converting conventional cement-based materials into stronger, smarter and more durable composites. This paper provides a comprehensive review of the properties of carbon nanomaterials, current developments and novel techniques in carbon nanomaterials enhanced cement-based composites (CN-CBCs). Further study of the applications of CN-CBCs at industrial scale is also discussed.

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“…The study demonstrated that cement is a promising adsorbent for the coagulation of GO from water. It is worthy of note that the GO coagulation product using cement can be further used as high-performance building material [ 49 ].…”

Section: Discussionmentioning

confidence: 99%

Cement-Induced Coagulation of Aqueous Graphene Oxide with Ultrahigh Capacity and High Rate Behavior

et al. 2018

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Graphene oxide (GO) has excellent physicochemical properties and is used in multiple areas. However, the potential toxicity and environmental problems associated with GO increase its risk to the ecological system. In this study, cement was employed as a coagulant to eliminate GO from aqueous solutions. The effects of the cement dosage, the contact time, and the concentration and volume of the aqueous GO solution on the GO coagulation capacity were investigated in detail. The results showed that the dosage of cement had a significant effect on the coagulation process, and coagulation equilibrium was achieved in less than 1 h. Compared to coagulants used to remove GO from water in other reports, cement exhibited an ultrahigh coagulation capacity of approximately 5981.2 mg/g with 0.4 mg/mL GO solution. The kinetic analysis showed that the GO removal behavior could be described by a pseudo second-order model. The in-depth mechanism of GO coagulation using cement included Ca2+-induced coagulation of GO and adsorption by the hydrated product of cement paste. The present study revealed that cement could be a very cheap and promising material for the efficient elimination of GO from aqueous solutions.

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Highly dispersed graphene oxide electrodeposited carbon fiber reinforced cement-based materials with enhanced mechanical properties

Cited by 127 publications

References 31 publications

Highly Dispersed Graphene Network Achieved by using a Nanoparticle‐Crosslinked Polymer to Create a Sensitive Conductive Sensor

Highly Dispersed Graphene Network Achieved by using a Nanoparticle‐Crosslinked Polymer to Create a Sensitive Conductive Sensor

Carbon nanomaterials enhanced cement-based composites: advances and challenges

Cement-Induced Coagulation of Aqueous Graphene Oxide with Ultrahigh Capacity and High Rate Behavior

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