Structural and thermal characterization of multiwall carbon nanotubes (MWCNTs) / aluminum (Al) nanocomposites

Saadallah, S.; Cablé, Axel; Hamamda, S.; Chetehouna, Khaled; Sahli, Mounir; Boubertakh, A; Рево, С. Л.; Gascoin, Nicolas

doi:10.1016/j.compositesb.2018.06.019

“…This dissimilarity in behavior between the Al and composite samples could be attributed to oxidation. 43 The linear TGA behavior and minimal weight loss indicated that the nanocomposite exhibited high thermal stability, further enhanced by the inclusion of CNTs as reinforcement in aluminum. Notably, at high temperatures, a slight downward slope in the TGA curve of the solution-mixed composite suggested a change in the rate, likely associated with the rapid evaporation of organic molecules, resulting in weight loss.…”

Section: Thermal Stabilitymentioning

confidence: 96%

Distribution of Carbon Nanotubes in an Aluminum Matrix by a Solution-Mixing Process

Kumar,

Soren,

Nirala

et al. 2023

ACS Omega

6

0

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In order to overcome the limitations of standard ball-mill mixing processes to fabricate a uniformly dispersed carbon nanotube (CNT) reinforcement composite without damaging CNTs in matrix powder, a unique and easy solution-mixing process was developed. The present study aims to synthesize Al-0.5 wt % CNT composites using ball-milling and solution-mixing processes and compares their CNT dispersion and structural and thermal properties. Compared with the ball-milling process, the solution-mixing process was simple and effective for the uniform distribution of CNTs without structural damage. Various methods were utilized to examine the structural characteristics of the composite powder. These techniques included high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Raman spectroscopy, and particle size analysis. Raman spectroscopy observes an increase of defects in ball-milled composites, and the particle size analyzer confirms the structural deformation, resulting in the degradation of composite powder mechanical properties. In the solution-mixing process, aluminum particles and the structure of CNTs are well-preserved even after mixing. Thermogravimetric analysis (TGA) was used to research the thermal stability of the composite materials. The results validated the impact of CNTs on thermal characteristics enhancement (improved thermal resistance) when compared with pure aluminum, suggesting potential uses in the aerospace industry, transport, and construction sectors.

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“…The use of powdered reinforcing particles continues to be an important approach in the development of new composites [10]. Many researchers have shown the effectiveness of reinforcing the aluminum matrix with carbon materials [11][12][13][14][15]. There is a growing trend of using carbon nanomaterials in composites.…”

Section: Introductionmentioning

confidence: 99%

Peculiarities of chemical interaction of some carbon nanoreinforcements with aluminum matrix in metal matrix composite (MMC)

Попов

¹

,

Борунова

²

,

Шелехов

³

et al. 2022

Materialwissenschaft Werkst

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The possibility of applying globular carbon for reinforcing the aluminum matrix when using mechanical alloying to produce composites was shown by investigating specific properties of chemical interaction of nanocarbon with the aluminum matrix. The structure of the initial particles of globular carbon and composite granules was studied. Mechanical alloying can significantly crush the initial particles of globular carbon. The use of the method of differential scanning calorimetry allowed the temperature of the start of the reaction between globular carbon nanoparticles and aluminum matrix with the formation of aluminum carbide to be determine as 320 °C-350 °C. Aluminum matrix composites with reinforcing particles of globular carbon can be used up to these temperatures without risk of the formation of aluminum carbide.

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“…e extraordinary potencies of CNTs, including high elasticity [30], high thermal and electrical conductivity [31,32], remarkable optical properties [33], and extreme aspect ratio, made them suitable for a wide range of applications such as energy storage systems, composites, sensors [34,35], molecule transportation and protein carriers [36], tissue engineering, and photothermal therapy [37][38][39][40][41]. In light of the enormous advantages of CNTs in biological applications, the carbon-based nanomedicine has been considered by many multidisciplinary researchers.…”

Section: Introductionmentioning

confidence: 99%

Au-O-MWCNTs and TiO2-O-MWCNTs as Efficient Nanocarriers for Dexamethasone: Adsorption Isotherms and Kinetic Studies

Haghighi

¹

,

Khoshfetrat

²

2021

International Journal of Chemical Engineering

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In this research, the fabrication of drug delivery systems based on oxidized multiwall carbon nanotubes (O-MWCNTs) was studied. Herein, TiO2 and Au were conjugated with O-MWCNTs to prepare efficient nanocarriers for dexamethasone (dex). The samples were characterized by Fourier transform infrared (FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD). In addition, dex loading was studied using adsorption isotherms including Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich. The results show that dex adsorption agreed well with the Freundlich isotherm. Increasing the TiO2 to O-MWCNT ratio from (1 : 4) to (1 : 2) can improve the adsorption capacity from 290 mg ⋅ g − 1 to 320 320 mg ⋅ g − 1 . The increasing Au amount increases the adsorption capacity from 437.78 mg ⋅ g − 1 (SA1) to maximum 476.19 mg ⋅ g − 1 (SA6). The maximum equilibrium binding energy A T 1.67 L ⋅ mg − 1 was obtained for SA2, and SA7 shows high binding strength between dex and the nanoadsorbent. Carbon nanotubes (CNTs) show good affinity with high loading capabilities for dexamethasone adsorption. The synthesized TiO2-O-MWCNTs:1/2 with the maximum removal percent (80%) was proposed as an appropriate nanocarrier for dexamethasone. Pseudo-first order, pseudo-second order, Elovich, and intraparticle diffusion models were investigated for all synthesized drug nanocarriers. According to regression coefficients, experimental data are in good agreement with the pseudo-second order model for all adsorbents except O-MWCNT/CTAB. Experimental results revealed that the Elovich model could account for the O-MWCNT/CTAB adsorbent.

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Structural and thermal characterization of multiwall carbon nanotubes (MWCNTs) / aluminum (Al) nanocomposites

Cited by 30 publications

References 31 publications

Distribution of Carbon Nanotubes in an Aluminum Matrix by a Solution-Mixing Process

Distribution of Carbon Nanotubes in an Aluminum Matrix by a Solution-Mixing Process

Peculiarities of chemical interaction of some carbon nanoreinforcements with aluminum matrix in metal matrix composite (MMC)

Au-O-MWCNTs and TiO2-O-MWCNTs as Efficient Nanocarriers for Dexamethasone: Adsorption Isotherms and Kinetic Studies

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