Comprehensive characterization of glycerol/ZnO green nanofluids for advances in multifunctional soft material technologies

Sengwa, R. J.; Saraswat, Mukul; Dhatarwal, Priyanka

doi:10.1016/j.molliq.2022.118925

Cited by 16 publications

(4 citation statements)

References 73 publications

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“…Structure and morphology of ZnO nanofluids.-Figure 2 shows the X-ray Diffraction (XRD) spectrum and Transmission electron microscope (TEM) of the prepared ZnO nanoparticles. 37,38 As shown in Fig. 2a, Its diffraction peak is in complete agreement with the peak of the monoclinic structure ZnO (JCPDS card No.…”

Section: Resultssupporting

confidence: 74%

Stability, Thermophysical, Optical and Photothermal Properties of ZnO Nanofluids with Added Anionic/Cationic Mixed Surfactants

Zhang,

Yang,

Shi

et al. 2024

ECS J. Solid State Sci. Technol.

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Metal oxide nanofluid is a new type of heat transfer medium with good thermal performance, which can be used to improve the heat collection and photothermal conversion performance of the collector. The development of new nanofluids with excellent stability, thermophysical and photothermal properties is very important for solar thermal utilization. In this paper, the ZnO nanofluids with SDS/CTAB mixed surfactants were prepared by two-step method. Their stability, thermophysical, optical and photothermal properties were studied based on experimental data. Then, the optimum concentration and preparation conditions of the proposed ZnO nanofluid adding SDS/CTAB with good photothermal performance were obtained. The results showed that the ZnO nanofluid adding SDS/CTAB mixed surfactants has good dispersion stability and thermal physical properties with thermal conductivity up to 0.772 W/(m·K). Moreover, it has the lowest transmittance of 0.10% and the highest extinction coefficient of 7.25 cm-1. Moreover, the addition of SDS/CTAB mixed surfactants makes ZnO nanofluids show better photothermal conversion efficiency, up to 87%. Therefore, ZnO nanofluids with SDS/CTAB added have great potential as working fluids for DASC.

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Section: Resultssupporting

confidence: 74%

Stability, Thermophysical, Optical and Photothermal Properties of ZnO Nanofluids with Added Anionic/Cationic Mixed Surfactants

Zhang,

Yang,

Shi

et al. 2024

ECS J. Solid State Sci. Technol.

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“…TC enhancement of 0.7–11.2% was recorded as temperature and concentration rise directly affected it. The TC of green nanofluids formulated by suspending eco-friendly ZnO in green glycerol at varying mass concentrations (0.01–1 wt%) was found to enhance with increasing concentration [ 28 ]. The influence of mixing ratio (70:30, 50:50, 30:70, and 10:90) and temperature (30–70 °C) on the TC of 0.5 vol% Al 2 O 3 –SiO 2 /water-green glycol (60:40) was investigated [ 47 ].…”

Section: Green Nanofluidsmentioning

confidence: 99%

“…In addition, studies are to be intensified concerning the effect of electric field intensity and orientation on the TC of nanofluids. In terms of sustainability and eco-friendly environment, investigation on less toxic green base fluids, nanoparticles, nanofluids, and synthetic routes marked with increased TC is expected to increase shortly as studies are presently very limited [ 28 , 47 , 140 , 141 , 142 ].…”

Section: Future Perspective and Challengesmentioning

confidence: 99%

“…In this case, two dissimilar nanoparticles (with different physical and chemical properties leading to different TC) were synergized for improved TC, and the duo was suspended in water to formulate a hybrid nanofluid [ 21 ]. Further studies based on these pioneering works have been conducted concerning the thermal properties and performance of hybrid nanofluids [ 22 , 23 , 24 , 25 , 26 , 27 , 28 ]. For both mono-particle and hybrid nanofluids, TC has been the pioneering and focal thermal property.…”

Section: Introductionmentioning

confidence: 99%

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Thermal Conductivity Enhancement of Metal Oxide Nanofluids: A Critical Review

et al. 2023

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Advancements in technology related to energy systems, such as heat exchangers, electronics, and batteries, are associated with the generation of high heat fluxes which requires appropriate thermal management. Presently, conventional thermal fluids have found limited application owing to low thermal conductivity (TC). The need for more efficient fluids has become apparent leading to the development of nanofluids as advanced thermal fluids. Nanofluid synthesis by suspending nano-size materials into conventional thermal fluids to improve thermal properties has been extensively studied. TC is a pivotal property to the utilization of nanofluids in various applications as it is strongly related to improved efficiency and thermal performance. Numerous studies have been conducted on the TC of nanofluids using diverse nanoparticles and base fluids. Different values of TC enhancement have been recorded which depend on various factors, such as nanoparticles size, shape and type, base fluid and surfactant type, temperature, etc. This paper attempts to conduct a state-of-the-art review of the TC enhancement of metal oxide nanofluids owing to the wide attention, chemical stability, low density, and oxidation resistance associated with this type of nanofluid. TC and TC enhancements of metal oxide nanofluids are presented and discussed herein. The influence of several parameters (temperature, volume/weight concentration, nano-size, sonication, shape, surfactants, base fluids, alignment, TC measurement techniques, and mixing ratio (for hybrid nanofluid)) on the TC of metal oil nanofluids have been reviewed. This paper serves as a frontier in the review of the effect of alignment, electric field, and green nanofluid on TC. In addition, the mechanisms/physics behind TC enhancement and techniques for TC measurement have been discussed. Results show that the TC enhancement of metal oxide nanofluids is affected by the aforementioned parameters with temperature and nanoparticle concentration contributing the most. TC of these nanofluids is observed to be actively enhanced using electric and magnetic fields with the former requiring more intense studies. The formulation of green nanofluids and base fluids as sustainable and future thermal fluids is recommended.

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Performance evaluation of an automobile radiator using CuO/glycerol based nanocoolant

Jain,

Kundan,

Singla

2023

Heat Mass Transfer

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Comprehensive characterization of glycerol/ZnO green nanofluids for advances in multifunctional soft material technologies

Cited by 16 publications

References 73 publications

Stability, Thermophysical, Optical and Photothermal Properties of ZnO Nanofluids with Added Anionic/Cationic Mixed Surfactants

Stability, Thermophysical, Optical and Photothermal Properties of ZnO Nanofluids with Added Anionic/Cationic Mixed Surfactants

Thermal Conductivity Enhancement of Metal Oxide Nanofluids: A Critical Review

Performance evaluation of an automobile radiator using CuO/glycerol based nanocoolant

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