Heat transfer intensification using polyaniline based nanofluids: Preparation and application

Gurav, Prasad; Naik, S. Srinu; Bhanvase, Bharat A.; Pinjari, Dipak V.; Sonawane, Shirish H.; Ashokkumar, Muthupandian

doi:10.1016/j.cep.2015.06.010

Cited by 29 publications

(9 citation statements)

References 39 publications

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“…Conversely, for the intrinsic PANI spectrum, the weak band appeared around 3444 cm −1 , which may be attributed to the stretching vibration of secondary amine. In addition, the vibration bands observed around 2748.18 1 , 1561.28, 1460.47 and 1296.26 cm −1 were due to the aromatic C─H vibration, CN of quinonoid rings, CC vibration and C─N stretching of benzenoid rings, respectively 31 . Moreover, the intrinsic PANI peaks at 1104.55 and 794.46 cm −1 were tribute to the B─NH + = Q stretching and out of plane C─H bending of 1,4‐distributed benzene ring, respectively 46 .…”

Section: Resultsmentioning

confidence: 94%

“…The improvement was attributed to the fibrous structure of PANI with high surface area and ease of dispersion due to one‐dimensional structure. However, the thermo‐physical properties were not measured experimentally, rather theoretical correlations were implemented to assess the thermal conductivity, viscosity, density and specific heat capacity 31 . Moreover, the fibrous structure of PANI has been synthesized via oxidative polymerization as reported in the literature 16,22,29,31 .…”

Section: Introductionmentioning

confidence: 99%

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Thermal conductivity, rheology and stability analysis of 2D tungsten disulphide‐doped polyaniline‐based nanofluids: An experimental investigation

et al. 2020

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Summary In this study, polyaniline (PANI) nanocomposite‐based nanofluids (NFs) in ethylene glycol were obtained with a two‐step method by varying volume concentrations from 0.005% to 0.02%. Tungsten disulphide (WS2) nanoparticles were doped in PANI having different weight percentage (1%, 2% and 5%) via oxidative in situ polymerization employing ammonium persulphate oxidant in an acidic environment. The nanocomposites were comprehensively characterised using various techniques, such as Fourier transform infrared spectroscopy, thermogravimetric analysis, field emission scanning electron microscopy and high‐resolution transmission electron microscopy. The formulated NFs were extensively investigated with zeta‐sizer, particle size analyzer, thermal property analyzer and rheometer in a temperature range of 25°C to 70°C. The zeta potential results (up to 54.5 mV) were evident of extraordinary stability of NFs at all targeted temperatures along with polydispersity index <30% and mean particle/agglomerate size in the range of 335.8 to 489 nm. Additionally, a remarkable thermal conductivity improvement (~20.7%) was achieved with intrinsic PANI‐based NFs at an operating temperature of 50°C. Subsequently, it varied substantially with WS2 doping within PANI matrix and reached to 117.9%. Furthermore, the rheological measurements have revealed the viscoelastic nature of NFs along with a remarkable reduction in apparent viscosity (up to 8.4%). The temperature sweep viscosity indicated the transition of relative viscosity from high to low at a critical temperature of about 55°C. The NF10 (WS2 + PANI 5, at 0.005 vol%) was found to be the best candidate with 63.8% thermal conductivity enhancement and 6.4% viscosity reduction as compared with the base fluid at an operating temperature of 50°C. Thus, WS2 doping within PANI has proved to be crucial in the proliferation of thermal conductivity and mitigation of viscosity.

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Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Thermal conductivity, rheology and stability analysis of 2D tungsten disulphide‐doped polyaniline‐based nanofluids: An experimental investigation

et al. 2020

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“…Polyaniline (PANI) has developed as nano additives for nanofluid system and has attracted great attention among researchers due to its unique behavior such as good in conductivity, cost effectiveness and nontoxic [19][20][21][22][23]. PANI nanofibers are usually synthesized via oxidative polymerization approach and exhibit fiber like morphology that provides higher surface area [24,25].…”

Section: Pani Conducting Polymer As Nano Additivesmentioning

confidence: 99%

A Brief Review on Thermal Behaviour of PANI as Additive in Heat Transfer Fluid

Sofiah

Samykano

Shahabuddin

et al. 2021

EmAIT

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Since a decade ago, investigation on nanofluids has grown significantly owing to its enhanced thermal properties compared to conventional heat transfer fluids. This engineered nanofluid has been widely used in the thermal engineering system to improve their energy consumption by improving the thermal efficiency of the system. The addition of nano-size particles as additives dispersed in the base fluids proved to significantly either improve or diminish the behaviour of the base fluids. The behaviour of the base fluid highly depends on the properties of the additives material, such as morphology, size, and volume fraction. Among the variety of nanoparticles studied, the conducting polymers have been subject of high interest due to its high environmental stability, good electrical conductivity, antimicrobial, anti-corrosion property and significantly cheap compared to other nanoparticles. As such, the main objective of the present review is to provide an overview of the work performed on thermal properties performance of conducting polymers based nanofluids.

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“…Polyaniline (PANI) based nanofluids have been studied earlier and it has been reported that it gives higher thermal conductivity [29] and a higher heat transfer coefficient [30]. Bhanvase et al [31] studied heat transfer enhancement in vertical helically coiled tube heat exchanger using PANI/water nanofluids.…”

Section: Introductionmentioning

confidence: 99%

“…The higher enhancement offered by PANI-CuO nanofluid is attributed to the PANI encapsulated CuO nanocomposite. The detailed literature review is depicted in the Table 1, which provides the insight of the enhancement in the heat transfer with the use of nanofluids [25][26][27][28][29][30][31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Intensified Thermal Conductivity and Convective Heat Transfer of Ultrasonically Prepared CuO–Polyaniline Nanocomposite Based Nanofluids in Helical Coil Heat Exchanger

M.R.Lanjewar

Bhanvase

Barai

et al. 2019

Period. Polytech. Chem. Eng.

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In this study, investigation of convective heat transfer enhancement with the use of CuO-polyaniline (CuO-PANI) nanocomposite based nanofluid inside vertical helically coiled tube heat exchanger was carried out experimentally. In these experiments, the effects of different parameters such as Reynolds number and volume % of CuO-PANI nanocomposite in nanofluid on the heat transfer coefficient of base fluid have been studied. In order to study the effect of CuO-PANI nanocomposite based nanofluid on heat transfer, CuO nanoparticles loaded in PANI were synthesized in the presence of ultrasound assisted environment at different loading concentration of CuO nanoparticles (1, 3 and 5 wt.%). Then the nanofluids were prepared at different concentrations of CuO-PANI nanocomposite using water as a base fluid. The 1 wt.% CuO-PANI nanocomposite was selected for the heat transfer study for nanofluid concentration in the range of 0.05 to 0.3 volume % and Reynolds number range of was 1080 to 2160 (±5). Around 37 % enhancement in the heat transfer coefficient was observed for 0.2 volume % of 1 wt.% CuO-PANI nanocomposite in the base fluid. In addition, significant enhancement in the heat transfer coefficient was observed with an increase in the Reynolds number and percentage loading of CuO nanoparticle in polyaniline (PANI).

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Heat transfer intensification using polyaniline based nanofluids: Preparation and application

Cited by 29 publications

References 39 publications

Thermal conductivity, rheology and stability analysis of 2D tungsten disulphide‐doped polyaniline‐based nanofluids: An experimental investigation

Thermal conductivity, rheology and stability analysis of 2D tungsten disulphide‐doped polyaniline‐based nanofluids: An experimental investigation

A Brief Review on Thermal Behaviour of PANI as Additive in Heat Transfer Fluid

Intensified Thermal Conductivity and Convective Heat Transfer of Ultrasonically Prepared CuO–Polyaniline Nanocomposite Based Nanofluids in Helical Coil Heat Exchanger

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