Quasi-solid electrolyte: a thixotropic gel of imogolite and an ionic liquid

Shikinaka, Kazuhiro; Taki, Noriyuki; Kaneda, Keisuke; Tominaga, Yoichi

doi:10.1039/c6cc07765j

Cited by 21 publications

(8 citation statements)

References 33 publications

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“…19,20 These recent developments have paved the way for novel imogolitelike nanotubes with fine control of their morphologies and properties either by atomic substitution, 21−23 changing the nature of precursors, 9,24,25 or the synthesis temperature. 26 Therefore, imogolite-like nanotubes could find applications in a wide range of domains, including nanocomposite materials, 27 liquid crystals, 28 stimuli-responsive hydrogels, 29 quasi-solid electrolyte, 30 (co)photocatalysis, 31−33 and molecular separation or storage. 34−36 However, for most of the intended applications, a prerequisite remains the control of nanotubes arrangement in the solid state.…”

Section: ■ Introductionmentioning

confidence: 99%

“…INTs can thus be rendered amphiphilic by replacing their inner silanol or germanol moiety by a functionalized one, or by grafting molecular compounds on the outer aluminum wall. − Whatever their nature (SW or DW) or their nominal composition (OH) 3 Al 2 O 3 Si x Ge 1– x (OH), INTs remain monodisperse in diameter and chirality, a feature ascribed to a unique minimum in the strain energy of the structure. , These recent developments have paved the way for novel imogolite-like nanotubes with fine control of their morphologies and properties either by atomic substitution, − changing the nature of precursors, ,, or the synthesis temperature . Therefore, imogolite-like nanotubes could find applications in a wide range of domains, including nanocomposite materials, liquid crystals, stimuli-responsive hydrogels, quasi-solid electrolyte, (co)photocatalysis, − and molecular separation or storage. − …”

Section: Introductionmentioning

confidence: 99%

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Effect of Ionic Strength on the Bundling of Metal Oxide Imogolite Nanotubes

et al. 2017

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Significant developments have been proposed over the past decade in the synthesis of aluminosilicate and aluminogermanate imogolite-like nanotubes. But, while liquid phase synthesis is well-controlled, it is not the case for the nanotube arrangement in the dry state. In particular, nanotubes are found to self-assemble in bundles of various sizes, which may impact the properties of the final product. Here, we investigate the effect of ionic strength on bundling of aluminogermanate single-walled imogolite nanotubes (Ge-SWINT) in aqueous suspensions and in the resulting powders after solvent evaporation. The nanotube arrangement as a function of salt concentration was studied by X-ray scattering experiments and simulations. In aqueous suspension, nanotubes bundling occurs only at high ionic strength (IS > 8 × 10–2 mol·L–1), while beyond this threshold, the increase of electrostatic repulsions induces a complete stabilization of individual nanotubes. After solvent evaporation, nanotube arrangement is shown to be dictated principally by the initial concentration of salt. Beyond an ionic strength of ∼10–3 mol·L–1 in the starting suspension, all Ge-SWINT samples tend to form large bundles in powder, whose lattice parameters are independent of the initial salt concentrations. These experimental results clearly show that the positive surface charge of imogolite can be used to control nanotubes bundling by anion condensation.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Ionic Strength on the Bundling of Metal Oxide Imogolite Nanotubes

et al. 2017

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“…However, incorporation of PMMA grafted INT into poly(vinyl chloride) (PVC) films reveal that the reinforcement is strongly dependent on the interfacial adhesion between the functionalized nanotubes and the polymer matrix [159]. In addition to reinforcement in solid materials, the combination of imogolite with various polymers also yields homogeneous hydrogels exhibiting thixotropic behaviour, hierarchical ordering as well as reversible isotropicanisotropic structural transitions in response to strain [138,139,161,163,[167][168][169]. Imogolite hydrogels can also be prepared with biomacromolecules [170,171] for encapsulation and/or for sustained release of enzymes or model drugs [172,173].…”

Section: Reinforcement Of Polymer Materialsmentioning

confidence: 99%

Nanomaterials From Imogolite: Structure, Properties, and Functional Materials

Paineau

Launois

2019

Nanomaterials From Clay Minerals

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Hollow cylinders with a diameter in the nanometer range are carving out prime positions in nanoscience. Thanks to their physico-chemical properties, they could be key elements for next-generation nanofluidics devices, for selective molecular sieving, energy conversion or as catalytic nanoreactors. Several difficult problems such as fine diameter and interface control are solved for imogolite nanotubes. This chapter will present an overview of this unique class of clay nanotubes, from their geological occurrence to their synthesis and their applications. In particular, emphasis will be put on providing an up-to-date description of their structure and properties, their synthesis and the strategies developed to modify their interfaces in a controlled manner. Developments on their applications, in particular for polymer/imogolite nanotubes composites, molecular confinement or catalysis, are presented.

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“…In most cases, the mechanical and optical properties of the resulting composite are enhanced, whether in film [84,[128][129][130][131], fiber [132] or membrane form [133][134][135] (Figure 7a). Beyond PVA, INT has been incorporated in a wide variety of polymer matrix (Table 3) either for nanotube-reinforced nanocomposites [90,96,100,138,143,149,150] with anisotropic structural properties (Figure 7b) [93,94,97,136,137,144,148,151,152], fabrication of hierarchical porous structures [139][140][141][142] or the encapsulation/sustained-release of biomolecules for medical applications (Figure 7c) [153][154][155][156][157][158][159]. Adapted with permission from [133].…”

Section: Applicationsmentioning

confidence: 99%

Imogolite Nanotubes: A Flexible Nanoplatform with Multipurpose Applications

Paineau

2018

Applied Sciences

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Among a wide variety of inorganic nanotubes, imogolite nanotubes (INTs) represent a model of nanoplatforms with an untapped potential for advanced technological applications. Easily synthesized by sol-gel methods, these nanotubes are directly obtained with a monodisperse pore size. Coupled with the possibility to adjust their surface properties by using straightforward functionalization processes, INTs form a unique class of diameter-controlled nanotubes with functional interfaces. The purpose of this review is to provide the reader with an overview of the synthesis and functionalization of INTs. The properties of INTs will be stated afterwards into perspective with the recent development on their applications, in particular for polymer/INTs nanocomposites, molecular confinement or catalysis.

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Quasi-solid electrolyte: a thixotropic gel of imogolite and an ionic liquid

Cited by 21 publications

References 33 publications

Effect of Ionic Strength on the Bundling of Metal Oxide Imogolite Nanotubes

Effect of Ionic Strength on the Bundling of Metal Oxide Imogolite Nanotubes

Nanomaterials From Imogolite: Structure, Properties, and Functional Materials

Imogolite Nanotubes: A Flexible Nanoplatform with Multipurpose Applications

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