Preparation, characterization, and analysis of multi-walled carbon nanotube-based nanofluid: an aggregate based interpretation

Abubakr, Mohamed; Osman, T. A.; Kishawy, Hossam A.; Elharouni, Farida; Hegab, Hussien; Esawi, Amal M. K.

doi:10.1039/d1ra03780c

Cited by 10 publications

(3 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The PI/MWCNT fiber surface becomes rough and has some tiny cracks, which may be caused by MWCNT aggregation. In general, MWCNTs clump together in solution due to the existence of the nano-size effect . Sequentially, the uniformity of MWCNTs in the fiber has an unpleasant adverse effect.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Polyimide/Carboxylated Multi-walled Carbon Nanotube Hybrid Aerogel Fibers for Fabric Sensors: Implications for Information Acquisition and Joule Heating in Harsh Environments

Guo

Zhang

et al. 2023

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Polymeric hybrid sensors have garnered great interest in health monitoring, human−computer interaction, and soft robotics for their lightweight, flexibility, and feasible fabrication process. However, polymeric hybrid sensors suitable for harsh environments remain a considerable challenge, limiting further application. Herein, polyimide (PI)/carboxylated multi-walled carbon nanotube (c-MWCNT) hybrid aerogel fibers with a micro-porous structure were fabricated via wet-spinning and chemical thermal imidization. The fabricated PI/c-MWCNT hybrid aerogel fibers' conductivity and the change of current in response to the bending degree were tested, in which the relative current change achieved 4.78% with a bending degree of 150°. The fibers possessed a density of 0.41 ± 0.06 g/cm 3 , a conductivity of 17.8 ± 2.9 μS/m, and a tensile strength of 13.0 ± 1.1 MPa. In addition, they exhibited excellent heat/cold durability, whose decomposition temperature, cold resistance, and service life were 367 °C, −196 °C, and 300 cycles, respectively. Furthermore, the fabric sensor woven with PI/c-MWCNT hybrid aerogel fibers demonstrated two sensitivity stages of stage 1 (S 1 ) = 6.04 and stage 2 (S 2 ) = 0.55 under various pressures. Besides, it could be heated to 62 °C at a voltage of 30 V in 90 s with a changing resistance. The above properties demonstrate that the as-prepared fabric sensor exhibited great application potential for information acquisition and joule heating in harsh environments.

show abstract

Section: Resultsmentioning

confidence: 99%

“…In general, MWCNTs clump together in solution due to the existence of the nano-size effect. 25 Sequentially, the uniformity of MWCNTs in the fiber has an unpleasant adverse effect. Therefore, we introduced carboxylic groups into hybrid aerogel fibers via replacing MWCNTs with c-MWCNTs.…”

Section: Microstructure and Formation Mechanismmentioning

confidence: 99%

Polyimide/Carboxylated Multi-walled Carbon Nanotube Hybrid Aerogel Fibers for Fabric Sensors: Implications for Information Acquisition and Joule Heating in Harsh Environments

Guo

Zhang

et al. 2023

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…A different optimum sonication time is observed for the thermal properties with 20 min (0.1 vol%), 20 min (0.3 vol%), 120 min (0.1 vol%), and 120 min (0.1 vol%) for κ, C p , θ, and σ, respectively. A study on the influence of surfactant quantity, volume concentration, and sonication duration (5-30 min) on the stability, dispersion, wettability, and viscosity of oil-based MWCNT NFs was conducted[170]. The results demonstrate the use of a high sonication time (30 min), low surfactant quantity (1:10), and moderate concentration (0.4 vol%) to achieve optimum stability, dispersion, wettability, and viscosity.…”

mentioning

confidence: 99%

Influence of Preparation Characteristics on Stability, Properties, and Performance of Mono- and Hybrid Nanofluids: Current and Future Perspective

et al. 2023

View full text Add to dashboard Cite

Nanofluids (NFs) synthesized via the suspension of diverse nanoparticles into conventional thermal fluids are known to exhibit better thermal, optical, tribological, and convective properties, photothermal conversion, and heat transfer performance in comparison with traditional thermal fluids. Stability is pivotal to NF preparation, properties, performance, and application. NF preparation is not as easy as it appears, but complex in that obtaining a stable NF comes with the harnessing of different preparation parameters. These parameters include stirring duration and speed, volume, density, base fluid type, weight/volume concentration, density, nano-size, type of mono or hybrid nanoparticles used, type and quantity of surfactant used, and sonication time, temperature, mode, frequency, and amplitude. The effect of these preparation parameters on the stability of mono and hybrid NFs consequently affects the thermal, optical, rheological, and convective properties, and photothermal conversion and heat transfer performances of NFs in various applications. A comprehensive overview of the influence of these preparation characteristics on the thermal, optical, rheological, and properties, photothermal conversion, and heat transfer performance is presented in this paper. This is imperative due to the extensive study on mono and hybrid NFs and their acceptance as advanced thermal fluids along with the critical importance of stability to their properties and performance. The various preparation, characterization, and stability methods deployed in NF studies have been compiled and discussed herein. In addition, the effect of the various preparation characteristics on the properties (thermal, optical, rheological, and convective), photothermal conversion, and heat transfer performances of mono and hybrid NFs have been reviewed. The need to achieve optimum stability of NFs by optimizing the preparation characteristics is observed to be critical to the obtained results for the properties, photothermal conversion, and heat transfer performance studies. As noticed that the preparation characteristics data are not detailed in most of the published works and thus making it mostly impossible to reproduce NF experimental studies, stability, and results; future research is expected to address this gap. In addition, the research community should be concerned about the aging and reusability of NFs (mono and hybrid) in the nearest future.

show abstract

Enhanced pool boiling heat transfer characteristics on microstructured copper surfaces coated with hybrid nanofluid

Rahul,

Kalita,

Sen

et al. 2024

J Therm Anal Calorim

View full text Add to dashboard Cite

Preparation, characterization, and analysis of multi-walled carbon nanotube-based nanofluid: an aggregate based interpretation

Abstract: Multiprespective analysis of MWCNTs nanofluids.

Cited by 10 publications

References 32 publications

Polyimide/Carboxylated Multi-walled Carbon Nanotube Hybrid Aerogel Fibers for Fabric Sensors: Implications for Information Acquisition and Joule Heating in Harsh Environments

Polyimide/Carboxylated Multi-walled Carbon Nanotube Hybrid Aerogel Fibers for Fabric Sensors: Implications for Information Acquisition and Joule Heating in Harsh Environments

Influence of Preparation Characteristics on Stability, Properties, and Performance of Mono- and Hybrid Nanofluids: Current and Future Perspective

Enhanced pool boiling heat transfer characteristics on microstructured copper surfaces coated with hybrid nanofluid

Contact Info

Product

Resources

About