Enhanced thermal conductivity of ethylene glycol with single-walled carbon nanotube inclusions

Harish, Sivasankaran; Ishikawa, Kiichiro; Einarsson, Erik; Aikawa, Satoru; Chiashi, Shohei; Shiomi, Junichiro; Maruyama, Shigeo

doi:10.1016/j.ijheatmasstransfer.2012.03.001

Cited by 131 publications

(52 citation statements)

References 53 publications

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“…This generated heat, if not dissipated, might potentially affect the structural integrity of the composite structure. Therefore, it is of great importance and urgent to develop PC composite with high thermal conductivity [1][2][3]. Taking account of the low thermal conductivity of PC matrix, one approach to improving the thermal conductivity is adding thermal conductive materials.…”

Section: Introductionmentioning

confidence: 99%

Improved thermal conductivity of polycarbonate composites filled with hybrid exfoliated graphite/multi-walled carbon nanotube fillers

Zhang

Liu

et al. 2015

J Therm Anal Calorim

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The thermal conductivities of polycarbonate (PC) composites filled with carbon fillers, including carbon black (CB), multi-walled carbon nanotubes (MWCNTs) and exfoliated graphite (EG), were studied. EG filler provided substantially greater thermal conductivity enhancement when embedded into PC matrix compared with CB and MWCNTs at the same loading. To further improve the thermal conductivity of PC composite, a hybrid EG/ MWCNTs filler was used. When the hybrid filler loading was 10 mass%, the radio of EG: MWCNTs was 9:1, and the thermal conductivity of PC composite showed a maximum value of 1.19 W m -1 K -1 higher than that filled with EG or MWCNTs alone, indicating that the combination of EG and MWCNTs demonstrated a synergistic effect for the thermal conductivity enhancement of PC. EG/MWCNTs/PC composite with thermal conductivity [5 W m -1 K -1 was fabricated when the filler content was 40 mass%, which would widen its field of applications in electrons, LED lamps and aerospace.

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Section: Introductionmentioning

confidence: 99%

Improved thermal conductivity of polycarbonate composites filled with hybrid exfoliated graphite/multi-walled carbon nanotube fillers

Zhang

Liu

et al. 2015

J Therm Anal Calorim

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“…Furthermore, the authors added that the heat transfer is more effective via carbon nanotubes due to the increased straightness ratio. Harish et al (2012) studied the thermal conductivity of ethylene glycol containing single-walled carbon nanotubes. Bile salt was used as surfactant in the study.…”

Section: Introductionmentioning

confidence: 99%

Stability and Thermal Conductivity Characteristics of Carbon Nanotube based Nanofluids

M.¹,

Leong²,

Risby³

2013

Int J Automot Mech Eng

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Water, ethylene glycol and engine oil are commonly used in heat exchanger applications. However, these fluids possess low thermal conductivity. The technology advancement in nanotechnology has enabled nano size particles to be included in a base fluid. This new generation of fluids is known as nanofluids. Producing a stable nanofluid with improved thermal conductivity is a challenging process. In the present study, multiwalled carbon nanotubes (MWCNT) based nanofluids with or without surfactant were investigated for their stability and thermal conductivity. The study indicates that nanofluids with added polyvinylpyrrolidone (PVP) surfactant exhibit better stability than nanofluids without surfactant. About 22.2% thermal conductivity improvement was observed for water containing 0.5wt% of MWCNT and 0.01wt% of PVP surfactant. The thermal conductivity also increases with increase of the MWCNT's weight fraction. It can be concluded that the addition of PVP and MWCNT into base fluid (water) is vital to produce a stable nanofluid with improved thermal conductivity.

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“…In recent years, numerous studies of materials such as nanocarbons, carbon nanotubes, and graphene have been conducted and have discovered that these materials have high thermal conductivity [25][26][27][28], excellent heat transfer performance [29,30], and physical properties that are unique for such materials [21][22][23][24][25][26][27][28][29][30][31][32][33][34]. Therefore, carbon-based nanomaterials are one of the most popular research areas.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Carbon-Based Nanofluids through the Water Vortex Trap Method

Cheng

Teng

2018

Journal of Nanomaterials

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This study designed an efficient one-step method for synthesizing carbon-based nanofluids (CBNFs). The method employs the vortex trap method (VTM) and an oxygen-acetylene flame, serving as a carbon source, in a manufacturing system of the VTM (MSVTM). The flow rate ratio of O 2 and C 2 H 2 was adjusted to form suitable combustion conditions for the reduced flame. Four flow rate ratios of O 2 and C 2 H 2 were used: 1.5 : 2.5 (V1), 1.0 : 2.5 (V2), 0.5 : 2.5 (V3), and 0 : 2.5 (V4). The morphology, structure, particle size, stability, and basic physicochemical characteristics of the obtained carbon-based nanomaterials (CBNMs) and CBNFs were investigated using transmission electron microscopy, field-emission scanning electron microscopy, X-ray diffraction, Raman spectrometry, ultraviolet-visible-near-infrared spectrophotometry, and a particle size-zeta potential analyzer. The static positioning method was utilized to evaluate the stability of the CBNFs with added EP dispersants. The evaluation results revealed the morphologies, compositions, and concentrations of the CBNFs obtained using various process parameters, and the relation between processing time and production rate was determined. Among the CBNMs synthesized, those obtained using the V4-0 flow rate ratio had the highest stability when no EP dispersant was added. Moreover, the maximum enhancement ratios of the viscosity and thermal conductivity were also obtained for V4-0: 4.65% and 1.29%, respectively. Different types and concentrations of dispersants should be considered in future research to enhance the stability of CBNFs for further application.

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Enhanced thermal conductivity of ethylene glycol with single-walled carbon nanotube inclusions

Cited by 131 publications

References 53 publications

Improved thermal conductivity of polycarbonate composites filled with hybrid exfoliated graphite/multi-walled carbon nanotube fillers

Improved thermal conductivity of polycarbonate composites filled with hybrid exfoliated graphite/multi-walled carbon nanotube fillers

Stability and Thermal Conductivity Characteristics of Carbon Nanotube based Nanofluids

Fabrication and Characterization of Carbon-Based Nanofluids through the Water Vortex Trap Method

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