Stable pickering emulsions using multi-walled carbon nanotubes of varying wettability

Briggs, Nicholas M.; Raman, Ashwin Kumar Yegya; Barrett, Lawrence; Brown, Chase; Li, Brian; Leavitt, Devlin; Aichele, Clint P.; Crossley, Steven

doi:10.1016/j.colsurfa.2017.10.010

Cited by 69 publications

(43 citation statements)

References 41 publications

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“…The effective and economical strategy is to bring in Pickering stabilizer, which can even substitute classical organic surfactants. 18,19 Various types of particles, such as SiO 2, 20 CNTs, 21 nanocellulose, 22,23 and so on, can be served as Pickering stabilizer. According to several innovative reports, [24][25][26][27] graphene oxide (GO), an excellent two-dimensional material with amphipathy, can be worked as a Pickering stabilizer.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional phase change microcapsules based on graphene oxide Pickering emulsion for photothermal energy conversion and superhydrophobicity

Zhao

Yang

et al. 2020

Int J Energy Res

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Summary In order to enlarge the applications of microencapsulated phase change materials (microPCMs), the novel stearic acid (SA)@graphene oxide (GO)/melamine‐formaldehyde (MF) multifunctional superhydrophobic microPCMs were prepared with the method of condensation polymerization. We have made a systematical study of the effects of GO content on the SA@GO/MF microPCMs. The morphology and chemical composition characterizations showed the successful fabrication of microcapsules. The differential scanning calorimeter (DSC) identified that microPCMs could store latent heat energy. According to the contact angles (CA) measurement, the microPCMs displayed the water contact angle of 160.2°, which possessed the superhydrophobic property. Moreover, the self‐cleaning property of SA@GO/MF microPCMs was demonstrated by designing self‐cleaning experiment. The simulated irradiation experiment showed the good photothermal conversion performance of microPCMs. Owing to photothermal energy conversion performance and superhydrophobicity, multifunctional phase change microcapsules could have vital potentials in energy conversion and self‐cleaning.

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Section: Introductionmentioning

confidence: 99%

Multifunctional phase change microcapsules based on graphene oxide Pickering emulsion for photothermal energy conversion and superhydrophobicity

Zhao

Yang

et al. 2020

Int J Energy Res

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“…Compared to emulsions stabilized by conventional molecular surfactants, Pickering emulsions are more stable due to their resistance to coalescence and Oswald ripening 3–5 , which makes them perfect candidates for industrial application in foods 6,7 , mining 8,9 , pharmaceuticals 10 and cosmetics 11 . In related research, a variety of nanoparticles with different morphologies have been used to stabilize Pickering emulsions, such as zero-dimensional nanoparticles 12 , one-dimensional nanowires 13 , and one-dimensional nanotubes 14 . Among different particle morphologies, the idea of applying two-dimensional disks or platelets to stabilize emulsion attracts more attention 15–17 .…”

Section: Introductionmentioning

confidence: 99%

Natural Halloysites-Based Janus Platelet Surfactants for the Formation of Pickering Emulsion and Enhanced Oil Recovery

Zhang

Lei

Luo

et al. 2019

Sci Rep

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Janus colloidal surfactants with opposing wettabilities are receiving attention for their practical application in industry. Combining the advantages of molecular surfactants and particle-stabilized Pickering emulsions, Janus colloidal surfactants generate remarkably stable emulsions. Here we report a straightforward and cost-efficient strategy to develop Janus nanoplate surfactants (JNPS) from an aluminosilicate nanoclay, halloysite, by stepwise surface modification, including an innovative selective surface modification step. Such colloidal surfactants are found to be able to stabilize Pickering emulsions of different oil/water systems. The microstructural characterization of solidified polystyrene emulsions indicates that the emulsion interface is evenly covered by JNPS. The phase behaviors of water/oil emulsion generated by these novel platelet surfactants were also investigated. Furthermore, we demonstrate the application of JNPS for enhanced oil recovery with a microfluidic flooding test, showing a dramatic increase of oil recovery ratio. This research provides important insights for the design and synthesis of two-dimensional Janus colloidal surfactants, which could be utilized in biomedical, food and mining industries, especially for circumstances where high salinity and high temperature are involved.

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“…This process could also be explained by the classical disperse system instability theory: Ostwald ripening. According to this theory, smaller drops have higher chemical potential, and larger droplets will grow at the cost of the smaller ones to reduce the potential energy of the whole system [22,23,24,25,26]. Asma Chebil et al have reported similar results [26].…”

Section: Resultsmentioning

confidence: 98%

Preparation and Property of Perfluoropolyether Emulsions

Zhang

Zhang²,

Bai³

et al. 2019

Polymers

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Perfluoropolyether (PFPE) glycerol emulsions were prepared. Three different green surfactants (AES (sodium laureth sulfate), APG (alkyl polyglycoside), and SDS (sodium dodecyl sulfate)) were chosen to emulsify the PFPE. Their properties and performance in shampoo were also investigated. Centrifuge stability measurements show that three PFPE emulsions have good stability. They are stable for 60 min when the centrifugal speed is 6000 r/min. In addition, a change of droplet size was observed with time. Moreover, its rheological properties and application performance was studied. The AES emulsion was the most stable emulsion and it was found to improve the slip and lubricity performance of the cotton, so it has potential applications in shampoo.

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Stable pickering emulsions using multi-walled carbon nanotubes of varying wettability

Cited by 69 publications

References 41 publications

Multifunctional phase change microcapsules based on graphene oxide Pickering emulsion for photothermal energy conversion and superhydrophobicity

Multifunctional phase change microcapsules based on graphene oxide Pickering emulsion for photothermal energy conversion and superhydrophobicity

Natural Halloysites-Based Janus Platelet Surfactants for the Formation of Pickering Emulsion and Enhanced Oil Recovery

Preparation and Property of Perfluoropolyether Emulsions

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