Synthesis of spherical silica/multiwall carbon nanotubes hybrid nanostructures and investigation of thermal conductivity of related nanofluids

Baghbanzadeh, Mohammadali; Rashidi, Alimorad; Rashtchian, Davood; Lotfi, Roghayyeh; Amrollahi, Azadeh

doi:10.1016/j.tca.2012.09.006

Cited by 214 publications

(44 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Silica is widely used as an inorganic additive in the fabrication of organic membranes due to its convenient operation, mild reactivity, mechanical strength, nontoxic nature, and the availability of its chemical properties [9,40,[58][59][60]. It was reported that using silica nanoparticles in different concentrations resulted in an improvement of mechanical strength [61][62][63][64][65][66] and thermal stability [67][68][69][70][71] of the host polymers.…”

Section: -2-silica (Sio 2 )mentioning

confidence: 99%

Effects of Inorganic Nano-Additives on Properties and Performance of Polymeric Membranes in Water Treatment

Baghbanzadeh

Rana

Lan

et al. 2015

Separation & Purification Reviews

Self Cite

View full text Add to dashboard Cite

Separation using selective polymeric membranes has been well-established as an energy-efficient and cost-effective technology in water treatment and many other applications involving aqueous solutions. However, limited chemical, thermal, and mechanical resistances besides their tendency to fouling and inadequate pure water flux may often restrict their applications. To this end, inorganic materials as additives have been demonstrated to be able to enhance chemical, thermal, and fouling membrane resistances, which demonstrate their great potential for developing novel membranes by using them as additives in polymer matrices. Considering the excellent characteristics of the nano-sized particles, this study reviews the effects of inorganic nanoadditives on properties and performance of polymer/nanoparticle composite membranes. It has been demonstrated that using nanomaterials in a polymer matrix could enhance the mechanical strength and stiffness, wettability, selectivity, water permeability, and antifouling characteristics of the host polymer. Abbreviation ALDAtomic Layer Deposition PAN Polyacrylonitrile AOP Advanced Oxidation Process PAS Polyarylsulfone APTS 3-Aminopropyltriethoxysilane PCTE Polycarbonate BET Brunauer Emmett Teller PDMS Polydimethylsiloxane BP Bucky-Paper PEI Polyethyleneimine BPPO Brominated Poly(phenylene oxide) PES Polyethersulfone BSA Bovine serum albumin PI Polyimide CA Cellulose acetate PMMA Poly(methyl methacrylate) Downloaded by [Deakin University Library] at 01:21 12 August 2015 A c c e p t e d M a n u s c r i p t CNIM Carbon Nanotube Immobilized Membrane PP Polypropylene CNT Carbon Nanotube PSf Polysulfone CTA Cellulose triacetate PTFE Polytetrafluoroethylene DCMD Direct Contact Membrane Distillation PV Pervaporation DLS Dynamic Light Scattering PVA Poly(vinyl alcohol) FO Forward Osmosis PVC Polyvinyl chloride GO Graphene Oxide PVDF Polyvinylidene fluoride ICP Internal Concentration Polarization RO Reverse Osmosis LEP Liquid Entry Pressure SDS Sodium dodecyl sulfate MD Membrane Distillation SEM Scanning Electron Microscopy Downloaded by [Deakin University Library] at 01:21 12 August 2015 A c c e p t e d M a n u s c r i p t MF Microfiltration SGMD Sweep Gas Membrane Distillation MWCNT Multi-Walled Carbon Nanotube SPES SulfonatedPolyethersulfone NF Nanofiltration TMOS Tetramethylorthosilicate NP Nanoparticle TMP Transmembrane Pressure PA Polyamide UF Ultrafiltration PAI Poly(amide-imide) VMD Vacuum Membrane Distillation 1-IntroductionThe increase in water demand for domestic, agricultural and industrial uses resulted in much attention toward water and waste water treatment technologies during the last few decades. The water demand is predicted to increase by 50% over the next few decades [1]. Membrane filtration, advanced oxidation processes (AOPs), and UV irradiation are among the processes that Downloaded by [Deakin University Library] at 01:21 12 August 2015A c c e p t e d M a n u s c r i p t have been used for this purpose [2] and membrane filtration is considered to be one of the most...

show abstract

Section: -2-silica (Sio 2 )mentioning

confidence: 99%

Effects of Inorganic Nano-Additives on Properties and Performance of Polymeric Membranes in Water Treatment

Baghbanzadeh

Rana

Lan

et al. 2015

Separation & Purification Reviews

Self Cite

View full text Add to dashboard Cite

show abstract

“…Their results showed that hybrid nanofluids with spherical particles exhibited a smaller increase in thermal conductivity comparing cylindrical shape particles. Baghbanzadeh et al [19] synthesized a hybrid of SiO 2 /MWCNTs by wet chemical method at room temperature. They investigated the effect of MWCNTs, SiO 2 nanospheres and hybrid nanostructures on the thermal conductivity of distilled water.…”

Section: Introductionmentioning

confidence: 99%

An experimental study on thermal conductivity of F-MWCNTs–Fe 3 O 4 /EG hybrid nanofluid: Effects of temperature and concentration

Harandi

Karimipour

Afrand

et al. 2016

International Communications in Heat and Mass Transfer

319

View full text Add to dashboard Cite

In this paper, an experimental study on the effects of temperature and concentration on the thermal conductivity of f-MWCNTs-Fe 3 O 4 /EG hybrid nanofluid is presented. The experiments were carried out for solid volume fraction range of 0 to 2.3% in temperatures ranging from 25°C to 50°C. The results revealed that the thermal conductivity ratio enhances with increasing the solid volume fraction and temperature. Results also showed that, at higher temperatures, the variation of thermal conductivity ratio with solid volume fraction was more than that at lower temperatures. Moreover, the effect of temperature on the thermal conductivity ratio was more noticeable at higher solid volume fractions. The thermal conductivity measurements also showed that the maximum thermal conductivity ratio was 30%, which occurred at temperature of 50°C for solid volume fraction of 2.3%. Finally, for engineering applications, based on experimental results, a precise correlation was suggested to predict the thermal conductivity of f-MWCNTs-Fe 3 O 4 /EG hybrid nanofluids.

show abstract

“…In fact, the concentration of nanoparticles in large and scattered sites may behave as internal solid structures, increasing the internal resistance to the fluid flow [4].Such a postulation has been both experimentally and theoretically proved by other researchers [38,39]. It can be safely drawn that the clustering phenomenon is one of the most important issues of nanofluids influencing their viscosity, extending from micro to nanoscale [13,20,[40][41][42].…”

Section: Nanoparticle's Concentration Effectmentioning

confidence: 91%

Evaluation of clustering role versus Brownian motion effect on the heat conduction in nanofluids: A novel approach

Daviran

Kasaeian

Tahmooressi

et al. 2017

International Journal of Heat and Mass Transfer

Self Cite

View full text Add to dashboard Cite

In this study, the temperature and viscosity-dependent methods were used to identify the main heat conduction mechanism in nanofluids. Three sets of experiments were conductedto investigate the effects of Brownian motion and aggregation. Image processing approach was used to identify detailed configurations of different nanofluids microstructures. The thermal conductivity of the nanofluids was measured with respect to the dynamic viscosity in the temperature range between 0 and 55 °C. TheResultsclearly indicated thatthe nanoparticle Brownian motion does not play a significant role in heat conduction of nanofluids, which was also supported by the observation that a more viscous sample rendered a higher thermal conductivity. Moreover, the microscopic pictures and the differences in the viscosity between theoretical and experimental valuessuggested the major role of particle aggregation and clustering.

show abstract

Synthesis of spherical silica/multiwall carbon nanotubes hybrid nanostructures and investigation of thermal conductivity of related nanofluids

Cited by 214 publications

References 31 publications

Effects of Inorganic Nano-Additives on Properties and Performance of Polymeric Membranes in Water Treatment

Effects of Inorganic Nano-Additives on Properties and Performance of Polymeric Membranes in Water Treatment

An experimental study on thermal conductivity of F-MWCNTs–Fe 3 O 4 /EG hybrid nanofluid: Effects of temperature and concentration

Evaluation of clustering role versus Brownian motion effect on the heat conduction in nanofluids: A novel approach

Contact Info

Product

Resources

About