Preparation of colloidal carbon nanotube dispersions and their characterisation using a disc centrifuge

Nadler, Michael; Mahrholz, Thorsten; Riedel, Ulrich; Schilde, Carsten; Kwade, Arno

doi:10.1016/j.carbon.2008.05.024

Cited by 72 publications

(55 citation statements)

References 24 publications

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“…It should be mentioned that the addition of surfactant which affect the thermophysical properties of nanofluids. (3) Using ultrasonic vibration: Ultrasonication is an accepted physical technique to disperse agglomerated NPs into the basefluid [86][87][88]. To disperse the aggregates of NPs, ultrasonication bath-or probe-based ultrasonic devices are most commonly used.…”

Section: Preparation Of Nanofluidsmentioning

confidence: 99%

Application of Nanoparticles in Enhanced Oil Recovery: A Critical Review of Recent Progress

et al. 2017

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Abstract:The injected fluids in secondary processes supplement the natural energy present in the reservoir to displace oil. The recovery efficiency mainly depends on the mechanism of pressure maintenance. However, the injected fluids in tertiary or enhanced oil recovery (EOR) processes interact with the reservoir rock/oil system. Thus, EOR techniques are receiving substantial attention worldwide as the available oil resources are declining. However, some challenges, such as low sweep efficiency, high costs and potential formation damage, still hinder the further application of these EOR technologies. Current studies on nanoparticles are seen as potential solutions to most of the challenges associated with these traditional EOR techniques. This paper provides an overview of the latest studies about the use of nanoparticles to enhance oil recovery and paves the way for researchers who are interested in the integration of these progresses. The first part of this paper addresses studies about the major EOR mechanisms of nanoparticles used in the forms of nanofluids, nanoemulsions and nanocatalysts, including disjoining pressure, viscosity increase of injection fluids, preventing asphaltene precipitation, wettability alteration and interfacial tension reduction. This part is followed by a review of the most important research regarding various novel nano-assisted EOR methods where nanoparticles are used to target various existing thermal, chemical and gas methods. Finally, this review identifies the challenges and opportunities for future study regarding application of nanoparticles in EOR processes.

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Section: Preparation Of Nanofluidsmentioning

confidence: 99%

Application of Nanoparticles in Enhanced Oil Recovery: A Critical Review of Recent Progress

et al. 2017

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“…DCP is a high resolution particle sizing technique that has been widely used in colloid science to size a range of lyophobic colloids including silica, 53 carbon nanotubes, 54 a range of copolymer latexes, 55,56 gold sols 57,58 and various nanocomposite particles. 10,14,16,18,29,32,39,59,60 In addition, DCP can be used to probe the colloidal stability of particulate dispersions.…”

Section: Particle Formation Mechanismmentioning

confidence: 99%

All-Acrylic Film-Forming Colloidal Polymer/Silica Nanocomposite Particles Prepared by Aqueous Emulsion Polymerization

2011

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Article:Fielding, L.A., Tonnar, J. and Armes, S.P. (2011) All-acrylic film-forming colloidal polymer/silica nanocomposite particles prepared by aqueous emulsion polymerization. Langmuir, 27 (17). 11129 -11144. ISSN 0743-7463 https://doi.org/10.1021/la202066n eprints@whiterose.ac.uk https://eprints.whiterose.ac.uk/ Reuse Unless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. Abstract. The efficient synthesis of all-acrylic, film-forming, core-shell colloidal nanocomposite particles via in situ aqueous emulsion copolymerization of methyl methacrylate with n-butyl methacrylate in the presence of a glycerol-functionalized ultrafine silica sol using a cationic azo initiator at 60 °C is reported. It is shown that relatively monodisperse nanocomposite particles can be produced with typical mean weight-average diameters of 140 -330 nm and silica contents of up to 39 wt. %. The importance of surface functionalization of the silica sol is highlighted and it is demonstrated that systematic variation of parameters such as the initial silica sol concentration and initiator concentration affect both the mean particle diameter and the silica aggregation efficiency. The nanocomposite morphology comprises a copolymer core and a particulate silica shell, as determined by aqueous electrophoresis, x-ray photoelectron spectroscopy and electron microscopy. Moreover, it is shown that films cast from n-butyl acrylate-rich copolymer/silica nanocomposite dispersions are significantly more transparent than those prepared from the poly(styrene-co-n-butyl acrylate)/silica nanocomposite particles reported previously. In the case of the aqueous emulsion homopolymerization of methyl methacrylate in the presence of ultrafine silica, a particle formation mechanism is proposed to account for the various experimental observations made when periodically sampling such nanocomposite syntheses at intermediate comonomer conversions.

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“…Chemical modification involves formation of covalent bonds and adding functional groups (-COOH) on the surface of CNT. Functionalisation of CNTs has been carried out by oxidation process under extensive sonication with mixture of sulphuric acid and nitric acid [15]. Physical methods include addition of variety of dispersants, surfactants, polymers and aromatic compounds [16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Stability and thermal conductivity enhancement of carbon nanotube nanofluid using gum arabic

Rashmi

Ismail

Sopyan

et al. 2011

Journal of Experimental Nanoscience

123

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Preparation of colloidal carbon nanotube dispersions and their characterisation using a disc centrifuge

Cited by 72 publications

References 24 publications

Application of Nanoparticles in Enhanced Oil Recovery: A Critical Review of Recent Progress

Application of Nanoparticles in Enhanced Oil Recovery: A Critical Review of Recent Progress

All-Acrylic Film-Forming Colloidal Polymer/Silica Nanocomposite Particles Prepared by Aqueous Emulsion Polymerization

Stability and thermal conductivity enhancement of carbon nanotube nanofluid using gum arabic

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