Effects of nanoparticles on engineering performance of cementitious composites reinforced with PVA fibers

Ling, Yifeng; Zhang, Peng; Wang, Juan; Taylor, Peter; Hu, Shaowei

doi:10.1515/ntrev-2020-0038

Cited by 28 publications

(21 citation statements)

References 52 publications

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“…Zhang and Ling et al found that adding 0–1.5% nanosilica particles was optimal for enhancing the compressive strength, flexural strength, and fracture energies of reinforced concrete with polyvinyl alcohol fibers. Moreover, 2.5% nanosilica particles was found to be the best for tensile strength; nevertheless, when the content was greater than 2%, the NS was prone to self-desiccation and flocking together, leading to micro cracks and strength losses in the composite [ 21 , 22 ]. According to the experimental results from most researchers on concrete with the addition of NS, it can be concluded that low doses of NS can significantly enhance the mechanical properties of concrete.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nano Silica Particles on Impact Resistance and Durability of Concrete Containing Coal Fly Ash

Zhang

Sha

et al. 2021

Nanomaterials

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In this study, the effect of adding nano-silica (NS) particles on the properties of concrete containing coal fly ash were explored, including the mechanical properties, impact resistance, chloride penetration resistance, and freezing–thawing resistance. The NS particles were added into the concrete at 1%, 2%, 3%, 4%, and 5% of the binder weight. The behavior under an impact load was measured using a drop weight impact method, and the number of blows and impact energy difference was used to assess the impact resistance of the specimens. The durability of the concrete includes its chloride penetration and freezing–thawing resistance; these were calculated based on the chloride diffusion coefficient and relative dynamic elastic modulus (RDEM) of the samples after the freezing–thawing cycles, respectively. The experimental results showed that the addition of NS can considerably improve the mechanical properties of concrete, along with its freezing–thawing resistance and chloride penetration resistance. When NS particles were added at different replacement levels, the compressive, flexural, and splitting tensile strengths of the specimens were increased by 15.5%, 27.3%, and 19%, respectively, as compared with a control concrete. The addition of NS enhanced the impact resistance of the concrete, although the brittleness characteristics of the concrete did not change. When the content of the NS particles was 2%, the number of first crack impacts reached a maximum of 37, 23.3% higher compared with the control concrete. Simultaneously, the chloride penetration resistance and freezing–thawing resistance of the samples increased dramatically. The optimal level of cement replacement by NS in concrete for achieving the best impact resistance and durability was 2–3 wt%. It was found that when the percentage of the NS in the cement paste was excessively high, the improvement from adding NS to the properties of the concrete were reduced, and could even lead to negative impacts on the impact resistance and durability of the concrete.

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Section: Introductionmentioning

confidence: 99%

Effect of Nano Silica Particles on Impact Resistance and Durability of Concrete Containing Coal Fly Ash

Zhang

Sha

et al. 2021

Nanomaterials

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“…When the nano-SiO 2 content varied from 0 to 1.5%, the fracture energy, initiation, and unstable fracture toughness marginally rose, however, they decreased when the nano-SiO 2 content was higher than 1.5%. 30 Due to the strong relationship between the mechanical and biological properties of scaffolds, these approaches have had a significant impact. Cell adhesion, proliferation, and differentiation can all be impacted by the mechanical qualities of the scaffolds.…”

Section: Resultsmentioning

confidence: 99%

“…In comparison to the composite containing the same amount of nano-SiO 2 , the composite including NC had lower strengths. When the nano-SiO 2 content varied from 0 to 1.5%, the fracture energy, initiation, and unstable fracture toughness marginally rose, however, they decreased when the nano-SiO 2 content was higher than 1.5% . Due to the strong relationship between the mechanical and biological properties of scaffolds, these approaches have had a significant impact.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of PEGylated SPIONs-Loaded Niosome for Codelivery of Paclitaxel and Trastuzumab for Breast Cancer Treatment: In Vivo Study

Masoumi Godgaz,

Asefnejad,

Bahrami

2024

ACS Appl. Bio Mater.

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There is a growing appeal for engineering drug delivery systems for controlled and local drug delivery. Conjugation of antibodies on the nanocarriers for targeted chemotherapeutic drugs has always been one of the main techniques. This work aims to develop a polycaprolactone/chitosan electrospun mat incorporated with paclitaxel/Fe 3 O 4 -loaded niosomes (SPNs) decorated with trastuzumab (TbNs) for cancer therapy. SPNs and TbNs were analyzed by DLS, zeta potential, scanning electron microscopy, transmission electron microscopy, and Fourier transform infrared spectroscopy. Fabricated mats with distinct concentrations of TbNs were classified into four groups (G0 (0), G1 (1), G2 (2.5), and G3 (5%)) and were studied physicochemically, mechanically, and biologically. Paclitaxel release was also studied for 7 days under an alternative magnetic field (AMF). The optimized mat was nominated for an in vivo study to evaluate its tumor growth inhibition. Based on the results, the TbNs had a spherical core and shell morphology with a smooth surface. The zeta potential and the mean size of TbNs were equal to −14.7 mV and 221 nm. TbNs did not affect the morphology and quality of nanofibers, but in general, the presence of TbNs increased the elastic modulus, water uptake, and degradation. Regarding the release study, AMF showed a significant increase in accelerating paclitaxel release from mats, and most releases belonged to the mat with 5% of TbNs. Results from the in vivo study showed the effective and synergistic effects of AMF on drug release and significant tumor growth inhibition. To summarize, the proposed nanocarrier under AMF can be a good candidate for cancer therapy.

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“…Li et al [26] found that the fiber volume should not be more than 2% to ensure good performance in ECC blends. Due to their composite performance and economic considerations, PVA fibers are among the types of fibers used by ECC and the other high performance cementitious composites [27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Mechanical, Microstructure and 3D Fractal Analysis of Nanocalcite-Modified Environmentally Friendly and Sustainable Cementitious Composites

et al. 2022

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Unlike conventional concrete materials, Engineered Cementitious Composites (ECC) use a micromechanics-based design theory in the material design process. Recently, the use of nanoparticles in various concretes and mortars has increased. This study used nanocalcite to investigate the mechanical, microstructural fractal analysis of environmentally friendly nanocalcite-doped ECC (NCa-ECC). This paper investigated the effects of nanocalcite (NCa) with different contents (0.5, 1, and 1.5% by mass of binder) on the mechanical properties of engineered cementitious composites (ECC). For this purpose, compressive strength, ultrasonic pulse velocity (UPV), and flexural strength tests were conducted to investigate the mechanical properties of the ECC series. In addition, SEM analyses were carried out to investigate the microstructural properties of the ECC series. The content of nanocalcite improved the mechanical and microstructural properties of the nanocalcite-modified ECC series. In addition, the 1 NCa series (1% nanocalcite modified to the mass of the binder) had the best performance among the series used in this study.

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Effects of nanoparticles on engineering performance of cementitious composites reinforced with PVA fibers

Cited by 28 publications

References 52 publications

Effect of Nano Silica Particles on Impact Resistance and Durability of Concrete Containing Coal Fly Ash

Effect of Nano Silica Particles on Impact Resistance and Durability of Concrete Containing Coal Fly Ash

Fabrication of PEGylated SPIONs-Loaded Niosome for Codelivery of Paclitaxel and Trastuzumab for Breast Cancer Treatment: In Vivo Study

Investigation of the Mechanical, Microstructure and 3D Fractal Analysis of Nanocalcite-Modified Environmentally Friendly and Sustainable Cementitious Composites

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