Effects of ultrasonication on the microstructures and mechanical properties of carbon nanotube films and their based composites

Zhang, Xuebing; Jiang, Xinrong; Qu, Shuxuan; Zhang, Han; Yang, Wengang; Lu, Weibang

doi:10.1016/j.compscitech.2021.109136

Cited by 16 publications

(4 citation statements)

References 39 publications

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“…In Fig. 6d , the film surface morphology exhibits a loose structure after ultrasonic treatment, making it challenging to identify the presence of SWCNTs and suggest potential damage to SWCNTs by ultrasonication 62 . Figure 6e shows an image of an undamaged SWCNT with rough lattice information found after ultrasonication, confirmed by its tube diameter.…”

Section: Resultsmentioning

confidence: 99%

Boosting thermoelectric performance of single-walled carbon nanotubes-based films through rational triple treatments

Liu,

Shi,

et al. 2024

Nat Commun

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Single-walled carbon nanotubes (SWCNTs)-based thermoelectric materials, valued for their flexibility, lightweight, and cost-effectiveness, show promise for wearable thermoelectric devices. However, their thermoelectric performance requires significant enhancement for practical applications. To achieve this goal, in this work, we introduce rational “triple treatments” to improve the overall performance of flexible SWCNT-based films, achieving a high power factor of 20.29 µW cm−1 K−2 at room temperature. Ultrasonic dispersion enhances the conductivity, NaBH4 treatment reduces defects and enhances the Seebeck coefficient, and cold pressing significantly densifies the SWCNT films while preserving the high Seebeck coefficient. Also, bending tests confirm structural stability and exceptional flexibility, and a six-legged flexible device demonstrates a maximum power density of 2996 μW cm−2 at a 40 K temperature difference, showing great application potential. This advancement positions SWCNT films as promising flexible thermoelectric materials, providing insights into high-performance carbon-based thermoelectrics.

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Section: Resultsmentioning

confidence: 99%

Boosting thermoelectric performance of single-walled carbon nanotubes-based films through rational triple treatments

Liu,

Shi,

et al. 2024

Nat Commun

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“…S quently, the copper powder was added to the crystallizer and ultrasonic mixing was tinued for another 15 min. Agglomerates of modified carbon nanotubes can be sepa before or during mixing with the copper matrix using ultrasound [24]. Ultrasonic w produce rapidly collapsing cavitation bubbles, causing separation and shear forces tangled nanotubes cut into shorter lengths mix more easily with the copper powde anchor around its grains.…”

Section: Preparation Of the Powder Mixtures And Ultrasonicationmentioning

confidence: 99%

The Influence of the Modification of Carbon Nanotubes on the Properties of Copper Matrix Sintered Materials

Piasecki,

Sobkowiak,

Boroński

et al. 2024

Materials

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This paper presents the results of research on the microstructure, mechanical, and tribological properties of Cu/0.5 wt.% MWCNT (multi-walled carbon nanotube) sintered composite materials produced by powder metallurgy. The purpose of this research was to investigate the impact of carbon nanotube modifications on the uniformity of their dispersion and the effectiveness of their bonding with the matrix. The MWCNTs were modified by chemical oxidation. Additionally, a modification of the ingredient mixing method utilizing ultrasonic frequencies was employed. The tests were carried out using scanning electron microscopy (SEM), transmission electron microscopy (TEM), Vickers hardness tests, static compression tests, and wear tests using the pin-on-disc method. Furthermore, mechanical properties and strain distribution analyses of the micro-specimens were conducted using the Micro-Fatigue System (MFS). The implemented modifications had a positive effect on the dispersion of MWCNTs in the copper matrix and on the mechanical and tribological properties of the sinters.

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“…To enhance the strength of CNT-based composites, preventing aggregation is crucial. This can be achieved by ultrasonication of the nanocomposite solution [11]. The properties of these composites are influenced by factors such as the weight percentage of CNTs, their orientation, and the bond formed between CNTs and the polymer matrix [12].…”

Section: Introductionmentioning

confidence: 99%

A Sensitive Strain Sensor Based on Multi-Walled Carbon Nanotubes/Polyaniline/Silicone Rubber Nanocomposite for Human Motion Detection

Hosseini,

Norouzi,

2023

Sci

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Strain sensors play a pivotal role in quantifying stress and strain across diverse domains, encompassing engineering, industry, and medicine. Their applicability has recently extended into the realm of wearable electronics, enabling real-time monitoring of body movements. However, conventional strain sensors, while extensively employed, grapple with limitations such as diminished sensitivity, suboptimal tensile strength, and susceptibility to environmental factors. In contrast, polymer-based composite strain sensors have gained prominence for their capability to surmount these challenges. The integration of carbon nanotubes (CNTs) as reinforcing agents within the polymer matrix ushers in a transformative era, bolstering mechanical strength, electrical conductivity, and thermal stability. This study comprises three primary components: simulation, synthesis of nanocomposites for strain sensor fabrication, and preparation of a comprehensive measurement set for testing purposes. The fabricated strain sensors, incorporating a robust polymer matrix of polyaniline known for its exceptional conductivity and reinforced with carbon nanotubes as strengthening agents, demonstrate good characteristics, including a high gauge factor, stability, and low hysteresis. Moreover, they exhibit high strain sensitivity and show linearity in resistance changes concerning applied strain. Comparative analysis reveals that the resulting gauge factors for composite strain sensors consisting of carbon nanotubes/polyaniline and carbon nanotubes/polyaniline/silicone rubber are 144.5 and 167.94, respectively.

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Effects of ultrasonication on the microstructures and mechanical properties of carbon nanotube films and their based composites

Cited by 16 publications

References 39 publications

Boosting thermoelectric performance of single-walled carbon nanotubes-based films through rational triple treatments

Boosting thermoelectric performance of single-walled carbon nanotubes-based films through rational triple treatments

The Influence of the Modification of Carbon Nanotubes on the Properties of Copper Matrix Sintered Materials

A Sensitive Strain Sensor Based on Multi-Walled Carbon Nanotubes/Polyaniline/Silicone Rubber Nanocomposite for Human Motion Detection

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