A High Thermal Conductivity of MgO-H2O Nanofluid Prepared by Two-Step Technique

Judran, Hadia Kadhim; Al-Hasnawi, Adnan Ghareeb Tuaamah; Zubaidi, Faten N. Al; Al-Maliki, Wisam Abed Kattea; Alobaid, Falah; Epple, Bernd

doi:10.3390/app12052655

Cited by 26 publications

(6 citation statements)

References 82 publications

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“…The two-step preparation involves the preparation and dispersion of nano-enhanced phases into the base fluid [81]. First, nano-enhanced phases are prepared via vapor deposition, chemical reduction, or mechanical milling and then dispersed into the base liquid via the mechanical dispersion method, ultrasonication, and addition of dispersants [82][83][84][85].…”

Section: Preparationmentioning

confidence: 99%

Nanoparticle-enhanced coolants in machining: mechanism, application, and prospects

Hu,

Li,

Zhou

et al. 2023

Front. Mech. Eng.

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Nanoparticle-enhanced coolants (NPECs) are increasingly used in minimum quantity lubrication (MQL) machining as a green lubricant to replace conventional cutting fluids to meet the urgent need for carbon emissions and achieve sustainable manufacturing. However, the thermophysical properties of NPEC during processing remain unclear, making it difficult to provide precise guidance and selection principles for industrial applications. Therefore, this paper reviews the action mechanism, processing properties, and future development directions of NPEC. First, the laws of influence of nano-enhanced phases and base fluids on the processing performance are revealed, and the dispersion stabilization mechanism of NPEC in the preparation process is elaborated. Then, the unique molecular structure and physical properties of NPECs are combined to elucidate their unique mechanisms of heat transfer, penetration, and antifriction effects. Furthermore, the effect of NPECs is investigated on the basis of their excellent lubricating and cooling properties by comprehensively and quantitatively evaluating the material removal characteristics during machining in turning, milling, and grinding applications. Results showed that turning of Ti–6Al–4V with multi-walled carbon nanotube NPECs with a volume fraction of 0.2% resulted in a 34% reduction in tool wear, an average decrease in cutting force of 28%, and a 7% decrease in surface roughness Ra, compared with the conventional flood process. Finally, research gaps and future directions for further applications of NPECs in the industry are presented.

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Section: Preparationmentioning

confidence: 99%

Nanoparticle-enhanced coolants in machining: mechanism, application, and prospects

Hu,

Li,

Zhou

et al. 2023

Front. Mech. Eng.

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“…All samples exhibited stability for more To prepare stable nanoparticles, researchers not only extended the stirring and mixing time but also added surfactants to the carrier fluid to increase the stability of the nanofluids. Judran et al [109] synthesized MgO nanoparticles in deionized water with volume concentrations ranging from 0.05% to 0.25%. The mixture of nanoparticles and base liquid was mechanically stirred for 30 min and then subjected to ultrasonic treatment, with durations ranging from 45 min to 180 min.…”

Section: Two Stepsmentioning

confidence: 99%

Nanofluids Minimal Quantity Lubrication Machining: From Mechanisms to Application

Chu,

Li,

Zhou

et al. 2023

Lubricants

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Minimizing the negative effects of the manufacturing process on the environment, employees, and costs while maintaining machining accuracy has long been a pursuit of the manufacturing industry. Currently, the nanofluid minimum quantity lubrication (NMQL) used in cutting and grinding has been studied as a useful technique for enhancing machinability and empowering sustainability. Previous reviews have concluded the beneficial effects of NMQL on the machining process and the factors affecting them, including nanofluid volume fraction and nanoparticle species. Nevertheless, the summary of the machining mechanism and performance evaluation of NMQL in processing different materials is deficient, which limits preparation of process specifications and popularity in factories. To fill this gap, this paper concentrates on the comprehensive assessment of processability based on tribological, thermal, and machined surface quality aspects for nanofluids. The present work attempts to reveal the mechanism of nanofluids in processing different materials from the viewpoint of nanofluids’ physicochemical properties and atomization performance. Firstly, the present study contrasts the distinctions in structure and functional mechanisms between different types of base fluids and nanoparticle molecules, providing a comprehensive and quantitative comparative assessment for the preparation of nanofluids. Secondly, this paper reviews the factors and theoretical models that affect the stability and various thermophysical properties of nanofluids, revealing that nanoparticles endow nanofluids with unique lubrication and heat transfer mechanisms. Finally, the mapping relationship between the parameters of nanofluids and material cutting performance has been analyzed, providing theoretical guidance and technical support for the industrial application and scientific research of nanofluids.

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“…MgO nanofluids based on different base fluids, such as water [20,21], ethylene glycol [22], kerosene [23], engine oil [10], and insulating oil [24][25][26], have been studied. MgO nanofluids in ethylene glycol and water are applied to produce coolants [20,27,28]; the dispersion of MgO nanoparticles in engine oil improves thermal conductivity [10]; dispersing MgO nanoparticles in ester oil increases the electrical insulation and heat dissipation of oil [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Highly Improved Dielectric and Thermal Performance of Polyalphaolefin Oil-Based Fluids Using MgO Nanoparticles

Thanh,

Ngoc,

Thuy

et al. 2023

Coatings

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Polyalphaolefin (PAO) oil is widely used as a dielectric liquid due to its outstanding dielectric strength, high flash point, good oxidation resistance, and stability. The dispersion of MgO nanoparticles in PAO yields nanofluids with many properties superior to base oils. This study clarifies the influence of MgO nanoparticles on the dielectric properties (breakdown voltage, volume resistivity, and relative permittivity) and heat transfer properties of PAO/MgO nanofluids. Changes in the concentration and size and the modification of MgO nanoparticles with surfactants change the dielectric and thermal performance of PAO/MgO nanofluids. Using PAO/MgO nanofluids as raw material to prepare dielectric fluid obtains a product with higher dielectric strength and thermal conductivity than those using PAO. The results show that PAO/MgO nanofluid-based dielectric fluid has the potential to be applied as a soft coating to protect electronic equipment in industries.

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A High Thermal Conductivity of MgO-H2O Nanofluid Prepared by Two-Step Technique

Cited by 26 publications

References 82 publications

Nanoparticle-enhanced coolants in machining: mechanism, application, and prospects

Nanoparticle-enhanced coolants in machining: mechanism, application, and prospects

Nanofluids Minimal Quantity Lubrication Machining: From Mechanisms to Application

Highly Improved Dielectric and Thermal Performance of Polyalphaolefin Oil-Based Fluids Using MgO Nanoparticles

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