Improving bond of fiber-reinforced polymer bars with concrete through incorporating nanomaterials

Wang, Xinyue; Ding, Siqi; Qiu, Liangsheng; Ashour, Ashraf; Wang, Yanlei; Han, Baoguo; Ou, Jinping

doi:10.1016/j.compositesb.2022.109960

Cited by 45 publications

(15 citation statements)

References 59 publications

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“…The construction of nano hierarchical structure through the addition of preformed SNFs may contribute to the functional design for CS fibers, such as achieving greater surface area, increasing the interfacial compactness, [ 40 ] and providing topographical cues to guide cell migration, proliferation and differentiation when applied as biomedical materials. [ 41 ] The effect of SNF content on the surface morphology of the prepared nanocomposite fibers was shown in Figure 2.…”

Section: Resultsmentioning

confidence: 99%

Silk nanofibrils/chitosan composite fibers with enhanced mechanical properties

Xiao

You

et al. 2022

Polymer Engineering & Sci

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Chitosan (CS) fibers have been applied in various fields due to their biocompatibility, biodegradability, and antibacterial properties. However, weak mechanical properties remain as obstacles to further applications. Silk nanofibrils (SNFs) extracted from natural silk fibroin fibers preserve outstanding mechanical properties at the nanoscale, which are expected to impact structural programming and mechanical reinforcement for CS fibers. In this study, wet‐spun CS/SNFs composite fibers were continuously collected from NaOH/ethanol coagulation. Scanning electron microscope (SEM) results showed that SNFs were uniformly distributed in the CS matrix, and obvious orientation was observed when the mass ratio of SNF/CS was 75/100. Tensile tests showed that the introduction of SNFs significantly enhanced the mechanical properties of CS fibers when the mass ratio of SNF/CS was more than 25/100. With the increasing of SNF content, the tensile strength gradually increased, and the tensile strength and modulus could be increased 2.9 times and 3.5 times, respectively, when 100% SNF was added. The improvement of mechanical properties was partially attributed to hydrogen bonding between SNF filaments and CS, which was confirmed by FTIR and XRD results. This study provides a facile and eco‐friendly method to spin CS fibers with enhanced mechanical properties and a hierarchical structure.

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Section: Resultsmentioning

confidence: 99%

Silk nanofibrils/chitosan composite fibers with enhanced mechanical properties

Xiao

You

et al. 2022

Polymer Engineering & Sci

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“…GnPs may have developed a good affinity for or bond with the resin matrix, which can improve load-transfer capacity by absorbing energy more efficiently and offering better crack-spreading resistance. [8][9][10] GnP-filled CFRP composites have a bending strength of 430 MPa, while hybrid particle-filled CFRP composites have a bending strength of 300 MPa, which is less than that of GnP-filled CFRP composites. The GnPs nanoparticles enhanced the toughness of epoxy resin and increased the interface bonding with carbon fibre and epoxy resin.…”

Section: Justificationsmentioning

confidence: 95%

“…12,13 It was discovered that fly ash and cement particles essentially contain metal oxide and react with epoxy resin molecules. 10 This significant improvement in flexural properties reflects the function of carbon fibre as the main load-carrying component of the composite material. 15,16 The graphene nanoplates and hybrid particle-filled epoxy resin hold the fibres together and also protect the fibres from delamination and debonding as shown in Figure 6(d) and (e).…”

Section: Flexural Strength-deflection Relationshipsmentioning

confidence: 99%

“…Despite considerable progress in graphene-based cementitious composites, the biggest problem with graphene production is its low cost on an industrial scale. 9,10 The study shows that the addition of nanomaterials can improve cement-based compressive strength and enhance permeability. Graphene oxide (GO) is the oxidation reaction product of graphene, a mixture of functional groups with single sp2 hybrid carbon, carboxyl, epoxy, and hydroxyl.…”

Section: Introductionmentioning

confidence: 99%

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Influence of hybrid nano/micro particles on the mechanical performance of cross-ply carbon fibre fabric reinforced epoxy polymer composite materials

Srivastava

Quadflieg

Gries

2023

Journal of Composite Materials

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This study presents the flexural strength, compressive strength, and impact energy behaviour of graphene nanoplates and fly ash microparticle-loaded cement-based CFRP composites manufactured by the vacuum-assisted resin infusion method (VARIM). The composite structures consist of a fixed ratio of graphene nanoplates (2%), fly ash (2%), silica (2%), cement (2%), and sand (4%) particles filled into cross-plied carbon fibre-reinforced epoxy resin polymer composite beams and columns. Composites fabricated by hand lay-up methods because of infiltration problems. A three-point bending test through the width was used to measure the flexural strength of the graphene nanoplate (GnP)-filled CFRP composite beam. The low-velocity Izod impact and Charpy impact tests through the thickness were used to determine Charpy impact energy (3.46 J), Izod impact energy (2.5 J), and the dynamic fracture toughness of notch specimens under Charpy (28.5 KJ/m2) and Izod impact (25.0 KJ/m2). Also, the compressive test method was used to measure the compressive strength of hybrid particles and short glass fibre-reinforced epoxy resin composite square and circular columns. The results show compressive strength and flexural strength. Izod impact energy, Charpy impact energy, and dynamic fracture toughness of hybrid nano/microparticle-filled fibre composites have higher values than virgin fibre composites because of the influence of graphene nanoparticles and the perfect interface bonding between two dissimilar molecules of nano and microparticles, which improve the fracture toughness and absorb impact energy. Overall, the results show that molecules of nano/microparticle-filled carbon fibre and glass fibre-reinforced epoxy resin composites can be used in seismic wave resistance because of their improved mechanical properties compared to virgin fibre composites. In addition, SEM micrographs clearly show that nano- and microparticles are resistant to crack propagation and the debonding of matrix fibres.

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“…Carbon nanotubes (CNTs) and graphene nanosheets are widely used as reinforcements to improve the defects of cement-based materials at the nanoscopic level due to their large surface and ultra-high strength. Despite considerable progress in graphene-based cementitious composites, the biggest problem with graphene production is its low cost on an industrial scale (Li et al, 2017;Wang et al, 2022). The study shows that the addition of nanomaterials can improve cement-based compressive strength and enhance permeability.…”

Section: Introductionmentioning

confidence: 97%

Mechanical Performance of Hybrid Graphene Nanoplates, Fly-Ash, Cement, Silica, and Sand Particles Filled Cross-Ply Carbon Fibre Woven Fabric Reinforced Epoxy Polymer Composites Beam and Column

Quadflieg¹,

Srivastava²,

Gries³

et al. 2023

JMSR

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The main goal of this study is to reduce the brittleness of a fibre-reinforced cement base structure when exposed to the effects of graphene nanoplates, fly ash, silica, sand, and cement fillers to better understand the effect of hybrid nano/micro particle fillers on the mechanical performance of cross-ply carbon fibre reinforced epoxy resin composites. A three-point bending test through the width was used to measure flexural strength. The impact tests Izod at low impact velocity and Charpy through the thickness were used to determine the dynamic fracture strengths of pre-cracked and non-cracked composite samples. Also, the compressive test method was used to measure the compressive strength of hybrid particles and short glass fibre-reinforced epoxy resin composite square and circular columns. The results show compressive strength and flexural strength. Izod impact energy, Charpy impact energy, and dynamic fracture toughness of hybrid nano/microparticle-filled fibre composites have higher values than virgin fibre composites due to the influence of graphene nanoparticles and perfect interface bonding between two dissimilar molecules of nano and microparticles, which improve the fracture toughness and absorb impact energy. Overall, the results indicate that molecules of nano/microparticle-filled carbon fibre and glass fibre-reinforced epoxy resin composites can be used in aggressive environments because of the improved mechanical properties in comparison to the virgin fibre composites. In addition, SEM micrographs clearly indicate that nano- and microparticles are resistant crack propagation and deboned of matrix fibres.

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Improving bond of fiber-reinforced polymer bars with concrete through incorporating nanomaterials

Cited by 45 publications

References 59 publications

Silk nanofibrils/chitosan composite fibers with enhanced mechanical properties

Silk nanofibrils/chitosan composite fibers with enhanced mechanical properties

Influence of hybrid nano/micro particles on the mechanical performance of cross-ply carbon fibre fabric reinforced epoxy polymer composite materials

Mechanical Performance of Hybrid Graphene Nanoplates, Fly-Ash, Cement, Silica, and Sand Particles Filled Cross-Ply Carbon Fibre Woven Fabric Reinforced Epoxy Polymer Composites Beam and Column

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