Stability of Aqueous Nanofluids Containing PVP-Coated Silver Nanoparticles

Iyahraja, S.; Rajadurai, J. Selwin

doi:10.1007/s13369-015-1707-9

Cited by 21 publications

(14 citation statements)

References 26 publications

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“…According to Stokes's law, sedimentation velocity is positively correlated to particle size, so reducing this size can improve nanofluid stability. Iyahraja and Rajadurai (2016) also obtained similar results, with smaller particle size leading to more stable nanofluids. It must be taken into account that smaller particles have a higher surface area and increase the probability of aggregation (Wu et al, 2009).…”

Section: Nanofluid Stability Evaluationsupporting

confidence: 58%

Synthesis of Zno Nanoparticles and their Nanofluid Stability in the Presence of a Palm Oil-Based Primary Alkyl Sulphate Surfactant for Detergent Application

Adiwibowo

Ibadurrohman

Slamet³

2018

IJTech

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ZnO nanoparticles were successfully synthesized by a solochemical method using zinc chloride as the precursor in a sodium hydroxide solution with ZnCl2:NaOH ratios of 1:2 and 1:3. The effects of the thermal treatment on the functionalities of the nanoparticles were investigated by comparing calcined ZnO with uncalcined ZnO. Calcined ZnO underwent a drying process at 120°C, followed by calcination at 500°C, while uncalcined ZnO underwent the drying process only. The synthesized nanoparticles were characterized by XRD and FESEM-EDX analysis. The photoactivity of synthesized ZnO was evaluated through methylene blue degradation. In addition, ZnO nanofluids were synthesized by dispersing nanoparticles into the base fluid. The nanofluidic stability in the presence of a Palm Oil-Based Primary Alkyl Sulphate (palmPAS) surfactant were investigated using a spectrophotometer UV-vis with varied PalmPAS concentrations. XRD and FESEM analysis showed that the nanoparticles exhibited a hexagonal wurtzite structure, and confirmed that the particle size increased on calcination. All the synthesized ZnO nanoparticles exhibited good photoactivity under UV light irradiation due, to some extent, to their good crystallinity. The calcined ZnO from the ZnCl2:NaOH ratio of 1:3 offered the best photocatalytic performance compared to its ZnO counterparts. It was also found that the nanofluids of uncalcined ZnO from the ZnCl2:NaOH ratio of 1:3, at a ZnO:palmPAS ratio of 1:9, offered the best stability.

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Section: Nanofluid Stability Evaluationsupporting

confidence: 58%

Synthesis of Zno Nanoparticles and their Nanofluid Stability in the Presence of a Palm Oil-Based Primary Alkyl Sulphate Surfactant for Detergent Application

Adiwibowo

Ibadurrohman

Slamet³

2018

IJTech

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“…The zeta potential reading of ionic surfactant was higher (>30mV) compare with a non-ionic surfactant. Iyahraja et al [5] had found that the PVP-Coated Silver/distilled water with SDS had a higher zeta potential value compare with without SDS.…”

Section: Effect Of Surfactant On Nanofluid Stability 311 Ionic Surfactantsmentioning

confidence: 99%

“…Furthermore, super-saturation of surfactant materials can worsen heat transfer performance by creating a thermal resistance layer on nanoparticles or by limiting the movement of the particles during the heat transfer process. Other than that, some type of surfactant will produce foam which can decrease the heat transfer performance by creating a barrier between the heated surface and the heat transfer fluid [5,26]. Furthermore, with the optimum amount of surfactant, Gallego et al [14] mentioned that Newtonian behavior and values close to those of water were found with the use of SDBS.…”

Section: Effect Of Surfactant On Heat Transfer Performancementioning

confidence: 99%

“…Chemical stabilization consists of using surfactants. Adding surfactant can prevent agglomeration without affecting the sedimentation velocity based on Stokes law [5] Furthermore, there are two types of surfactants which are ionic surfactant and non-ionic surfactant. Both types of surfactants had been widely used with various nanoparticles in the preparation of nanofluid.…”

Section: Introductionmentioning

confidence: 99%

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A Review on Stability and Heat Transfer Performance of Nanofluid Using Surfactants

Harun¹,

Sidik²,

Rohaizan³

2020

ARMS

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Nanofluid had been widely used in heat transfer applications due to its better thermophysical properties. However, nanofluid had a problem in the stability of nanoparticles suspended in the based fluid. Several ways had been done to increase the stability of nanofluids including using surfactants. The purpose of this review is to uncover the stability and heat transfer performance of nanofluid using surfactants. A systematic review was used to collect the related articles for this review. This review shows the mechanism of two types of surfactants that had been used which are ionic and non-ionic. Furthermore, the stability of nanofluid is very important to enhance the thermal performance of nanofluid. The recommendations are highlighted to study the optimum amount of surfactant for respective nanofluids.

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“…Meanwhile, Iyahraja et al researched on the properties of silver nanofluid with polyvinylpyrrolidone and sodium dodecyl sulfate and study the size of the particle and the surfactant characteristics. They showed that by increment of particle size, the stability would be decreased [34]. Koca et al also studied the properties of silver nanofluid without any surfactant and compare with water [35].…”

Section: -Introductionmentioning

confidence: 99%

The Impact of Tilt Angle and Flowrate on Performance of Nanofluid Based Photovoltaic/ Thermal (PV/T) Solar Collectors

Naderi

Gazori²,

Bozegi³

2020

Preprint

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Background Today, by the arrival of new sustainable energy technology, the provision of energy for the global population has turned into a significant issue for societies. Meanwhile, photovoltaic/thermal (PV/T) solar collectors, as one of the most advanced types to produce electricity and heat simultaneously, can be applied with nanofluid as the working fluid. Methods In this research, PVP coated silver nanofluid was prepared in three volume concentrations being 250, 500 and 1000 ppm by two-step method to determine the stability and thermal conductivity, experimentally. Then, the performance of PV/T solar collector is analyzed by TRNSYS software to study electrical and thermal efficiency and also output electrical and thermal energy in different months, flowrates (25, 50, 75, 100, 150 and 200 l/h) and nanofluid’s concentration. Results Based on the results, the optimum flowrate and nanofluid’s concentration are obtained 50 l/h and 1000 ppm PVP coated silver nanofluid. At last, the effect of tilt angle on the output thermal and electrical energy is determined. According to the results, by changing tilt angle in different months, the performance of PV/T solar collector can be ameliorated. Conclusion This paper can be heeded as a novel approach to overcome the lack of solar radiation in winters by improving the performance of PV/T solar collectors.

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Stability of Aqueous Nanofluids Containing PVP-Coated Silver Nanoparticles

Cited by 21 publications

References 26 publications

Synthesis of Zno Nanoparticles and their Nanofluid Stability in the Presence of a Palm Oil-Based Primary Alkyl Sulphate Surfactant for Detergent Application

Synthesis of Zno Nanoparticles and their Nanofluid Stability in the Presence of a Palm Oil-Based Primary Alkyl Sulphate Surfactant for Detergent Application

A Review on Stability and Heat Transfer Performance of Nanofluid Using Surfactants

The Impact of Tilt Angle and Flowrate on Performance of Nanofluid Based Photovoltaic/ Thermal (PV/T) Solar Collectors

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