Interfacial modification: The dynamic compression properties and enhancement mechanism of concrete added with micro-nano hierarchical carbon-based fiber

Lu, Song; Wei, Xia; Bai, Erlei; Ling, Liyun; Du, Yuchen

doi:10.1016/j.compositesb.2022.110340

Cited by 24 publications

(4 citation statements)

References 41 publications

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“…As depicted in Figure B, the characteristic peaks of C, O, and Fe are visible in the survey spectrum of the PEN composite foams. The high-resolution spectra (Figure S4) of C 1 s of the GCF composite foams could be fitted by three distinct deconvolution peaks located at 248.8, 286.3, and 288.4 eV, corresponding to C–C/CC, C–O, and CO, respectively. , The N from −CN of the PEN was not clearly observed, probably due to the low atomic content. Figure C exhibited the XPS spectrum of Fe 2p of the GCF composite foams, in which the intense signals for Fe 2p 3/2 and Fe 2p 1/2 validated the presence of Fe 3 O 4 particles. , Table S1 displays that the atomic percentages of Fe 2p in GCF composite foams range from 10.93 to 16.74%.…”

Section: Resultsmentioning

confidence: 99%

“…As depicted in Figure4B, the characteristic peaks of C, O, and Fe are visible in the survey spectrum of the PEN composite foams. The high-resolution spectra (FigureS4) of C 1 s of the GCF composite foams could be fitted by three distinct deconvolution peaks located at 248.8, 286.3, and 288.4 eV, corresponding to C−C/C�C, C−O, and C�O, respectively 46,47. The N from −CN of the PEN was not clearly observed, probably due to the low atomic content.…”

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confidence: 99%

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In Situ Growth of Fe₃O₄ Nanoparticles in Poly(arylene ether nitrile)/Graphene/Carbon Nanotube Foams for Electromagnetic Interference Shielding

Zhang

Wang

et al. 2023

ACS Appl. Nano Mater.

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Due to the growing severity of electromagnetic radiation pollution, effective and absorption-dominated electromagnetic shielding materials must be developed. In this study, poly(arylene ether nitrile)/ graphene/carbon nanotube (PEN/G/CNT) composite foam was prepared by nonsolvent induced phase separation, and Fe 3 O 4 particles were grown in situ by co-precipitation method, obtaining PEN/G/ CNT/Fe 3 O 4 (GCF) composite foams. The successful incorporation of magnetic Fe 3 O 4 particles was demonstrated by the scanning electron microscope images and the hysteresis loops, which was proved to effectively reduce the impedance mismatch and enhance the dielectric losses and magnetic losses of the composite foams, resulting in improved absorption and reduced secondary electromagnetic pollution. The electromagnetic interference shielding effectiveness (EMI SE) of GCF composite foams rose with the increase of Fe 3 O 4 content and GCF with the Fe 3 O 4 concentration of about 3.55 wt % showed the highest EMI SE of around 38 dB and the highest absorption ratio of about 94%. This effort provides a feasible and effective pathway for the fabrication of lightweight, easily scalable, heat-resistant, and absorption-dominated EMI shielding materials.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

In Situ Growth of Fe₃O₄ Nanoparticles in Poly(arylene ether nitrile)/Graphene/Carbon Nanotube Foams for Electromagnetic Interference Shielding

Zhang

Wang

et al. 2023

ACS Appl. Nano Mater.

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“…The dynamic compression tests were performed using a split Hopkinson pressure bar (SHPB) (Cao et al, 2020; Lu et al, 2022; Markovsky et al, 2022; Soares and Hokka, 2021; Tang et al, 2022). SHPB consists of an impact bar, an incident bar, a transmission bar, and an absorption bar, as shown in Figure 3.…”

Section: Methodsmentioning

confidence: 99%

Dynamic mechanical response and deformation mechanism of poly (ε-caprolactone) (PCL) / epoxy resin(EP) shape memory polymer composites

Wei,

Tan

2024

Journal of Intelligent Material Systems and Structures

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The dynamic mechanical response and deformation mechanism of poly (ε-caprolactone) (PCL) and epoxy resins shape memory polymer (SMP) composites were investigated in this paper. The SMP composites were a blend of PCL and epoxy resins by using the facile melt-mixing method. The distribution of PCL in the composites was observed by SEM, which was in from microparticle morphology to continuous morphology with the increasing PCL content. And the dynamic mechanical analyzer (DMA) tests were performed to demonstrate the viscoelastic properties and shape memory effect of the PCL/EP composites. Based on the above characterization of PCL/EP composites, the split Hopkinson pressure bar (SHPB) tests were performed to study the dynamic mechanical properties at the strain rates of 4000/s to 7000/s. The results showed that the flow stress increased with the increasing strain rate, which exhibited an obvious sensitivity to strain rate. However, the flow stress of PCL/EP decreases with the increasing PCL content due to the low strength of PCL. And PCL/EP composites failed in a typical ductile failure mode under quasi-static loading, whereas an excellent plastic deformation ability was observed at high strain rates, which was attributed to the heat generated by the plastic work during the adiabatic compression. Combining with the experimental results, the corresponding deformation mechanism was also discussed.

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“…Concrete is the most widely used building material in the construction industry and has the greatest impact on total emissions and natural resource consumption in the construction industry [1][2][3][4][5]. Therefore, the construction industry is striving to achieve sustainable development through technological innovation and the use of recycled materials to protect the environment and reduce dependence on natural resources [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Original Concrete Strength and Initial Moisture Condition on the Properties Improvement of Recycled Coarse Aggregate via Accelerated Carbonation Reactions

Ju,

Wu,

Liu

et al. 2024

Materials

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The physical and mechanical properties of recycled coarse aggregate (RCA) are worse than those of natural coarse aggregate (NCA), and the overall performance of recycled concrete prepared from RCA is worse than that of natural aggregate concrete. Treatment of RCA by CO2-accelerated carbonation effectively improves the macroscopic properties of RCA. The degree of influence of raw material factors, i.e., the original concrete strength (OCS) and initial moisture content (IMC) of RCA, on the carbonation of RCAs is very complex. Herein, an accelerated carbonation experiment for RCA with different material factors as variables was carried out to explore the influence of the abovementioned factors on the physical properties of carbonated recycled coarse aggregate (CRCA). By analyzing the microstructure of the RCA with the best modification effect before and after carbonation, the carbonation modification mechanism of the RCA was revealed. The physical performance indexes, including the apparent density, water absorption and carbonation rate, of the dried RCA with an OCS of C40 and C50 were significantly improved. The research results can provide basic data and theoretical support for promoting the popularization and application of RCA and recycled concrete in practical engineering.

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Interfacial modification: The dynamic compression properties and enhancement mechanism of concrete added with micro-nano hierarchical carbon-based fiber

Cited by 24 publications

References 41 publications

In Situ Growth of Fe₃O₄ Nanoparticles in Poly(arylene ether nitrile)/Graphene/Carbon Nanotube Foams for Electromagnetic Interference Shielding

In Situ Growth of Fe₃O₄ Nanoparticles in Poly(arylene ether nitrile)/Graphene/Carbon Nanotube Foams for Electromagnetic Interference Shielding

Dynamic mechanical response and deformation mechanism of poly (ε-caprolactone) (PCL) / epoxy resin(EP) shape memory polymer composites

Influence of the Original Concrete Strength and Initial Moisture Condition on the Properties Improvement of Recycled Coarse Aggregate via Accelerated Carbonation Reactions

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Interfacial modification: The dynamic compression properties and enhancement mechanism of concrete added with micro-nano hierarchical carbon-based fiber

Cited by 24 publications

References 41 publications

In Situ Growth of Fe3O4 Nanoparticles in Poly(arylene ether nitrile)/Graphene/Carbon Nanotube Foams for Electromagnetic Interference Shielding

In Situ Growth of Fe3O4 Nanoparticles in Poly(arylene ether nitrile)/Graphene/Carbon Nanotube Foams for Electromagnetic Interference Shielding

Dynamic mechanical response and deformation mechanism of poly (ε-caprolactone) (PCL) / epoxy resin(EP) shape memory polymer composites

Influence of the Original Concrete Strength and Initial Moisture Condition on the Properties Improvement of Recycled Coarse Aggregate via Accelerated Carbonation Reactions

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In Situ Growth of Fe₃O₄ Nanoparticles in Poly(arylene ether nitrile)/Graphene/Carbon Nanotube Foams for Electromagnetic Interference Shielding

In Situ Growth of Fe₃O₄ Nanoparticles in Poly(arylene ether nitrile)/Graphene/Carbon Nanotube Foams for Electromagnetic Interference Shielding