Terahertz time domain detection of imidazolium ionic liquid reactivity in nanohybrid materials based on Kaolinite and Halloysite

Zacher, Tomáš; Hronský, Viktor; Naftaly, Mira; Čaplovičová, Mária; Emmerich, Katja; Steudel, Annett; Mečiarová, Mária; Janek, M.

doi:10.1016/j.clay.2016.10.036

Cited by 6 publications

(4 citation statements)

References 44 publications

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“…The most representative approach is to form kaolinite‐dimethyl sulfoxide (DMSO) intercalation compound, which is typically obtained by mixing kaolinite with DMSO under agitation at 60 °C for 3 d in a reactor equipped with a refluxer. The suspension is centrifuged to obtain kaolinite‐DMSO intercalation compound, which is washed several times with acetone and then dried, ready for exfoliation . But usually clays intercalated by polar molecules can only be exfoliated into “large particles” assembled with dozens of monolayers.…”

Section: Design and Fabricationmentioning

confidence: 99%

Strategic Design of Clay‐Based Multifunctional Materials: From Natural Minerals to Nanostructured Membranes

Zhou

LaChance

Smith

et al. 2019

Adv Funct Materials

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Nature not only carefully prepares ingenious raw materials but also continuously inspires and guides human beings to create a wide variety of intelligent materials. As the most abundant mineral resource on earth, clay minerals are no longer synonymous with ceramics and cements. Many natural clay minerals can be exfoliated into single-or few-layered nanosheets with exquisite physicochemical properties, which can be reassembled into functional membranes with a macroscopic controllable size and microscopic ordered structure. They are thus used in many fields including chemistry, biology, energy, and environmental science. Strategic design represents one of the key processes to enhance the value of clay minerals and broaden their applications. In this work, the three frequently used approaches of exfoliation are highlighted and the six routes of assembly including casting, dip-coating, spray coating, vacuum filtration, electrophoretic deposition, and 3D printing are compared. The corresponding principles and advantages are summarized. Representative applications of clay-based multifunctional membranes in protection, separation, responsiveness, flexible electronics, and energy conversion are presented. The challenges and future perspectives of the claybased multifunctional membranes are discussed.

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Section: Design and Fabricationmentioning

confidence: 99%

Strategic Design of Clay‐Based Multifunctional Materials: From Natural Minerals to Nanostructured Membranes

Zhou

LaChance

Smith

et al. 2019

Adv Funct Materials

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“…A molecular dynamics study on the interface between imidazolium‐based ILs and kaolinite was recently performed, relating the degree of confinement to the type of packing, going from ordered to liquid‐like structures . Terahertz time‐domain spectroscopy was demonstrated to afford useful information on the structural configurations of an imidazolium IL intercalated in kaolinite and in halloysite, indicating different configurations in the two intercalates …”

Section: Ils Modified Kaolinitementioning

confidence: 99%

Clay Minerals—Ionic Liquids, Nanoarchitectures, and Applications

Dedzo

Detellier

2017

Adv Funct Materials

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Clay minerals, whose world resources are extremely large, have the potential to be more exploited as the basis for functional materials. Of interest are their interactions with ionic liquids (ILs). These compounds have found a large number of applications in the last few decades due to unique properties, such as low vapor pressure, high thermal stability, and remarkable solvation abilities. In the case of the swelling smectites, the organic cation of ILs can replace interlayer cations and find applications in the preparation of nanocomposites. This feature article is mainly focused on kaolinite, a nonswelling 1:1 phyllosilicate, whose layers are essentially neutral. Consequently, the intercalation of ILs involves both cation and anion. The organic cations can be designed to bear hydroxyl groups that will react with the aluminol internal surface of kaolinite, resulting in ionic liquids not only intercalated but also grafted. The resulting nanohybrid materials are characterized by a fixed, rigid, constrained 2D structure, whose dimension can be tuned by the size of the organic cation, whereas the anion is exchangeable. These materials are used for sensing applications such as the specific detection of anions as well as their quantitative analysis. They are also used as catalyst support for nanoparticles.

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“…Other authors also reported the good thermal stability of pyridinium ILs . Such materials appear promising for applications as ionic conductors at high temperatures …”

Section: Modification Of Kaolinite By Ilsmentioning

confidence: 90%

“…Other authors also reported the good thermal stability of pyridinium ILs. [62] Such materials appear promising for applications as ionic conductors at high temperatures. [61,63] The potential of kaolinite when used as polymer filler is not fully expressed because of its poor dispersion within the polymer matrices, as a consequence of its strong tendency to form large aggregates.…”

Section: Intercalation and Grafting Of Imidazolium-ilsmentioning

confidence: 99%

Kaolinite Clay Mineral Reactivity Improvement through Ionic Liquid Functionalization

Dedzo

2018

Israel Journal of Chemistry

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Since the intercalation of 1‐ethylpyridinium chloride in the interlayer space of kaolinite in 2005, several other ionic liquids (ILs) have been successfully intercalated. Unlike other clay minerals that display charged structural units, kaolinite is almost neutral. ILs intercalation in kaolinite results in both the cation and the anion in the interlayer space. The confinement of ILs in this two‐dimensional polarized space is of numerous interests, with certainly the most important to be discovered. Moreover, kaolinite interlayer space is decorated by a dense network of hydroxyl functions that can be easily functionalized. Recent study demonstrates that it is possible to synthesize ILs from simple organic molecules whose cations can be permanently grafted into the interlayer space of kaolinite. This review presents the results obtained in kaolinite functionalization by ILs, by focusing on the synthesis, applications and potential perspectives offered by these new nanohybrid materials.

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Terahertz time domain detection of imidazolium ionic liquid reactivity in nanohybrid materials based on Kaolinite and Halloysite

Cited by 6 publications

References 44 publications

Strategic Design of Clay‐Based Multifunctional Materials: From Natural Minerals to Nanostructured Membranes

Strategic Design of Clay‐Based Multifunctional Materials: From Natural Minerals to Nanostructured Membranes

Clay Minerals—Ionic Liquids, Nanoarchitectures, and Applications

Kaolinite Clay Mineral Reactivity Improvement through Ionic Liquid Functionalization

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