Effect of graphene-based additives on mechanical strength and microstructure of gypsum plaster

Dogan, Gokhan Mirza; Arbag, Huseyin; Koyuncu, Dilşad Dolunay Eslek

doi:10.1016/j.mtcomm.2022.104555

Cited by 5 publications

(3 citation statements)

References 57 publications

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“…The characteristic XRD peak of the graphite structure, which corresponded to the (002) crystal phase, was clearly visible at 2θ = 26.5°in the XRD patterns of GC composite foam. 41,42 In addition to the main peak, a small peak at 2θ = 44.2°was also observed, corresponding to the (100) reflection of the hexagonal graphite structure. 41 These facts support the existence of G and CNTs in composite foams.…”

Section: Resultsmentioning

confidence: 93%

“…41,42 In addition to the main peak, a small peak at 2θ = 44.2°was also observed, corresponding to the (100) reflection of the hexagonal graphite structure. 41 These facts support the existence of G and CNTs in composite foams. However, it must be noted that the characteristic peak of G and CNTs could hardly be seen in the XRD patterns of the GCF composite foams, which may be attributed to either the complete exfoliation of G and CNTs in the PEN matrix or the partial exfoliation leaving a limited amount of crystalline G and CNTs.…”

Section: Resultsmentioning

confidence: 93%

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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: 93%

Section: Resultsmentioning

confidence: 93%

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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“…These results are in agreement with values from literature. For gypsum materials, the real density was between 2300 and 2600 kg/m 3 , depending on its hydration [47,48] the apparent density ranges between 940 and 1300 kg/m 3 [49][50][51][52], and the open porosity ranges from 36% to 68%, depending on water/gypsum mass ratio and on hydration [52][53][54]. For cellular concretes, the apparent density ranges from 300 to 600 kg/m 3 , the real density ranges around 2500 and 2600 kg/m 3 , the total and open porosities are close and are about 69%-87% [28][29][30]55,56].…”

Section: Density and Porositymentioning

confidence: 99%

Effect of Air Velocity and Initial Conditioning on the Moisture Buffer Value of Four Different Building Materials

et al. 2023

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Porous materials are able to exchange moisture with the surrounding air. The more hygroscopic they are, the more they contribute to regulate ambient humidity. This ability is characterized by the moisture buffer value (MBV) which is measured under dynamic solicitations according to different protocols. The NORDTEST protocol is the most commonly-used. It gives recommendations regarding the air velocity and the ambient conditions for initial stabilization. The purpose of this article is to measure the MBV according to the NORDTEST protocol and to study the effect of air velocity and of initial conditioning on the MBV results for different materials. Two mineral and two bio-based materials are considered: gypsum (GY), cellular concrete (CC), thermo-hemp (TH) and fine-hemp (FH). Following the NORDTEST classification, GY is a moderate hygric regulator, CC is good, TH and FH are excellent. When the air velocity ranges from 0.1 to 2.6 m/s, the MBV of GY and CC materials remains constant, but the MBV of TH and FH materials is highly affected. The initial conditioning has no effect on the MBV, but has an effect on the water content of the material, whatever the material.

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Electrochemical determination of fenuron herbicide in environmental water samples by electro-reduced graphene oxide sensor

Borges,

Breslin,

Nossol

2024

J Appl Electrochem

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Fenuron (FEN) is a herbicide that acts as a weed growing inhibitor in crops. Due to its persistence and good solubility in water, its presence in water bodies is emerging as a concern for aquatic species. Herein, we propose a simple development of an electrochemically reduced graphene oxide (rGO) sensor for the monitoring of FEN in water samples. The electrochemical determination of FEN showed the best performance in a 0.1 mol L − 1 NaCl solution (pH = 2.5). Differential pulse voltammetry (DPV) was performed using optimal parameters and resulted in two linear ranges (0.4-12 µmol L − 1 and 20 to 50 µmol L − 1 ) with high sensitivities of 6.83 and 1.9 µA µmol − 1 L, respectively, and a low LD of 0.34 µmol L − 1 . Stability, reproducibility, and interference tests showed that rGO is su ciently reliable to be used as a sensor of FEN in real samples. Spiked tap and canal water samples returned recoveries close to 100%, exhibiting no statistically signi cant difference when compared to a UV-Vis method by an average paired t-test, attesting the viability of the rGO modi ed electrode as a promising sensor of FEN in environmental water samples.

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Effect of graphene-based additives on mechanical strength and microstructure of gypsum plaster

Cited by 5 publications

References 57 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

Effect of Air Velocity and Initial Conditioning on the Moisture Buffer Value of Four Different Building Materials

Electrochemical determination of fenuron herbicide in environmental water samples by electro-reduced graphene oxide sensor

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Effect of graphene-based additives on mechanical strength and microstructure of gypsum plaster

Cited by 5 publications

References 57 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

Effect of Air Velocity and Initial Conditioning on the Moisture Buffer Value of Four Different Building Materials

Electrochemical determination of fenuron herbicide in environmental water samples by electro-reduced graphene oxide sensor

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Product

Resources

About

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