An investigation on effective thermal conductivity of hybrid-filler polymer composites under effects of random particle distribution, particle size and thermal contact resistance

Ngo, Ich-Long; Truong, Viet Anh

doi:10.1016/j.ijheatmasstransfer.2019.118605

Cited by 38 publications

(15 citation statements)

References 55 publications

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“…Particularly, it was noted at large sizes the particle distribution/orientation significantly alter effective thermal conductivity. However at small size, due to particle packing fraction the orientation/distribution did not show any significant variation in effective thermal conductivity of polymer‐based composites 13 . As far as the results of lowest concentration in NFs are concerned, a number of factors may elaborate the current observations.…”

Section: Resultsmentioning

confidence: 68%

“…However at small size, due to particle packing fraction the orientation/distribution did not show any significant variation in effective thermal conductivity of polymer-based composites. 13 As far as the results of lowest concentration in NFs are concerned, a number of factors may elaborate the current observations. For instance, it has been reported that the temperature increase the mean free path of aggregates which influence to longer length scales at high temperatures.…”

Section: Thermal Conductivity Of Nfsmentioning

confidence: 90%

“…Ngo et al have shown that the hybrid fillers in polymer matrix can significantly improve the thermal conductivity of polymer composites. The guidelines have also been proposed to optimize the fillers concentrations and various other parameters for thermal enhancement 13,14 . Meanwhile conjugated conducting polymers (CPs) have been exploited to tune the thermo‐physical properties of the NFs 15 .…”

Section: Introductionmentioning

confidence: 99%

“…Apart from the use of polymer composite‐based NFs, the construction materials for the heat exchanger are also being replaced with polymer matrixes due to economic feasibilities 17,18 . Therefore, scientific community has initiated to explore the thermal potential of hybrid‐polymer fillers for their thermal conductivity improvements 13,19 . Regarding polymer‐based NFs, among many CP nanomaterials, PANI has got much attention due to its intrinsic conducting properties, non‐toxicity, easy synthesis, cost effectiveness, environmental robustness and unique surface chemistry 16,20 .…”

Section: Introductionmentioning

confidence: 99%

“…17,18 Therefore, scientific community has initiated to explore the thermal potential of hybrid-polymer fillers for their thermal conductivity improvements. 13,19 Regarding polymer-based NFs, among many CP nanomaterials, PANI has got much attention due to its intrinsic conducting properties, non-toxicity, easy synthesis, cost effectiveness, environmental robustness and unique surface chemistry. 16,20 Owing to the high charge mobility (free electrons) at molecular level, PANI has shown anomalous augmentation in electrical conductivity in intrinsic as well as in nanocomposite forms.…”

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: 68%

Section: Thermal Conductivity Of Nfsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

et al. 2020

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Enhanced thermal conductivity and wear resistance of polytetrafluoroethylene via incorporating hexagonal boron nitride and alumina particles

Chen

Yao

et al. 2021

J of Applied Polymer Sci

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Polytetrafluoroethylene (PTFE) receives wide attention in electronic packaging materials due to its excellent dielectric properties, friction properties and thermal stability. However, its extremely low thermal conductivity limits its further application. In this work, hexagonal boron nitride (h-BN) platelets are added into PTFE matrix to improve the thermal conductivity as the expense of largely deteriorated friction property. To make up the loss of friction property, alumina particles (AO) are also added and the effects of filler ratio between h-BN and alumina on the thermal conductivity and tribological performance of PTFE composites are investigated. It is interesting to find that when the filler ratio of h-BN and alumina is fixed at 2:1, the through-plane and in-plane thermal conductivity of PTFE composite filled with 30 vol% hybrid filler can be increased to 1.544 Wm À1 K À1 and 2.029 Wm À1 K À1 (5.5 and 5.7 times that of PTFE), respectively. Furthermore, the coefficient of friction of PTFE composites only increases by 21.32% and the wear rate decreased by 48.09%, compared with that of PTFE. Our work demonstrates a facile method to achieve much improved thermal conductivity of PTFE while maintaining its excellent dielectric properties and friction properties by using hybrid filler of h-BN and AO.

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Experimental and computational study of the thermal conductivity of polymeric micro spheres/polyester thermal insulating coatings

et al. 2022

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An investigation on effective thermal conductivity of hybrid-filler polymer composites under effects of random particle distribution, particle size and thermal contact resistance

Cited by 38 publications

References 55 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

Enhanced thermal conductivity and wear resistance of polytetrafluoroethylene via incorporating hexagonal boron nitride and alumina particles

Experimental and computational study of the thermal conductivity of polymeric micro spheres/polyester thermal insulating coatings

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