Controlling the macroscopic liquid-like behaviour of halloysite-based solvent-free nanofluids via a facile core pretreatment

Du, Peixin; Liu, Dong; Yuan, Peng; Deng, Liangliang; Wang, Shun; Zhou, Junming; Zhong, Xuemin

doi:10.1016/j.clay.2018.01.037

Cited by 15 publications

(3 citation statements)

References 45 publications

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“…Therefore, the reactivities of the outer and inner surfaces are different [38]. Because of these properties, there are many different applications of halloysite, such as solvent-free nanofluids [39,40], nanoreactors [41], drug delivery [42], energy storage devices, etc. [43].…”

Section: Introductionmentioning

confidence: 99%

A Novel Experimental Study on the Rheological Properties and Thermal Conductivity of Halloysite Nanofluids

Alkurdi

Lukács

et al. 2020

Nanomaterials

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Nanofluids obtained from halloysite and de-ionized water (DI) were prepared by using surfactants and changing pH for heat-transfer applications. The halloysite nanotubes (HNTs) nanofluids were studied for several volume fractions (0.5, 1.0, and 1.5 vol%) and temperatures (20, 30, 40, 50, and 60 °C). The properties of HNTs were studied with a scanning electron microscope (SEM), energy-dispersive X-ray analysis (EDX), Fourier-transform infrared (FT-IR) spectroscopy, X-ray powder diffraction (XRD), Raman spectroscopy and thermogravimetry/differential thermal analysis (TG/DTA). The stability of the nanofluids was proven by zeta potentials measurements and visual observation. With surfactants, the HNT nanofluids had the highest thermal conductivity increment of 18.30% for 1.5 vol% concentration in comparison with the base fluid. The thermal conductivity enhancement of nanofluids containing surfactant was slightly higher than nanofluids with pH = 12. The prepared nanofluids were Newtonian. The viscosity enhancements of the nanofluid were 11% and 12.8% at 30 °C for 0.5% volume concentration with surfactants and at pH = 12, respectively. Empirical correlations of viscosity and thermal conductivity for these nanofluids were proposed for practical applications.

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Section: Introductionmentioning

confidence: 99%

A Novel Experimental Study on the Rheological Properties and Thermal Conductivity of Halloysite Nanofluids

Alkurdi

Lukács

et al. 2020

Nanomaterials

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“…A similar synthetic approach, via tertiary amine (N,N-decyl-N-methyl-N trimethylsilyl propyl ammonium chloride: DMAC) and sulfonate PEG anion canopy (nonylphenoxy poly(ethyleneoxy) ethanol sodium sulfonate: NPES), was used to functionalize sepiolite (magnesium silicate of fibrous morphology) nanoparticles, which also presented liquid-like behavior at room temperature [ 114 ]. Halloysite-based solvent-free ionic nanofluids were prepared, and had a polysiloxane quaternary ammonium corona ionically tethered to sulfonated functionalized PEG [ 115 ]. This ionic nanofluid also exhibited a liquid-like behavior at room temperature but with different dispersion and stability in different solvents.…”

Section: Methodsmentioning

confidence: 99%

“…This ionic nanofluid also exhibited a liquid-like behavior at room temperature but with different dispersion and stability in different solvents. The fluidity could be tuned by altering the graft density of the shell to the core and the shell–core, interaction which can be tuned by core preheating or by changing the surface functional moieties of the core by acid or alkaline etching [ 115 ]. In other types of materials, by controlling the electrostatic attraction between positively charged poly(ethylene imine) (PEI) and negatively charged sodium alginate (SA) dispersion, the charge density of SA can be tuned to enable the good dispersion of Ca

perovskite nanosheets in SA [ 116 ].…”

Section: Methodsmentioning

confidence: 99%

From Ionic Nanoparticle Organic Hybrids to Ionic Nanocomposites: Structure, Dynamics, and Properties: A Review

Karatrantos

Mugemana²,

Bouhala³

et al. 2022

Nanomaterials

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Ionic nanoparticle organic hybrids have been the focus of research for almost 20 years, however the substitution of ionic canopy by an ionic-entangled polymer matrix was implemented only recently, and can lead to the formulation of ionic nanocomposites. The functionalization of nanoparticle surface by covalently grafting a charged ligand (corona) interacting electrostatically with the oppositely charged canopy (polymer matrix) can promote the dispersion state and stability which are prerequisites for property “tuning”, polymer reinforcement, and fabrication of high-performance nanocomposites. Different types of nanoparticle, shape (spherical or anisotropic), loading, graft corona, polymer matrix type, charge density, molecular weight, can influence the nanoparticle dispersion state, and can alter the rheological, mechanical, electrical, self-healing, and shape-memory behavior of ionic nanocomposites. Such ionic nanocomposites can offer new properties and design possibilities in comparison to traditional polymer nanocomposites. However, to achieve a technological breakthrough by designing and developing such ionic nanomaterials, a synergy between experiments and simulation methods is necessary in order to obtain a fundamental understanding of the underlying physics and chemistry. Although there are a few coarse-grained simulation efforts to disclose the underlying physics, atomistic models and simulations that could shed light on the interphase, effect of polymer and nanoparticle chemistry on behavior, are completely absent.

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Toxic influence of pristine and surfactant modified halloysite nanotubes on phytopathogenic bacteria

Abhinayaa

Jeevitha

Mangalaraj

et al. 2019

Applied Clay Science

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Controlling the macroscopic liquid-like behaviour of halloysite-based solvent-free nanofluids via a facile core pretreatment

Cited by 15 publications

References 45 publications

A Novel Experimental Study on the Rheological Properties and Thermal Conductivity of Halloysite Nanofluids

A Novel Experimental Study on the Rheological Properties and Thermal Conductivity of Halloysite Nanofluids

From Ionic Nanoparticle Organic Hybrids to Ionic Nanocomposites: Structure, Dynamics, and Properties: A Review

Toxic influence of pristine and surfactant modified halloysite nanotubes on phytopathogenic bacteria

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