Functional nanohybrid materials derived from kaolinite

Dedzo, Gustave Kenne; Detellier, Christian

doi:10.1016/j.clay.2016.01.010

Cited by 69 publications

(54 citation statements)

References 64 publications

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“…The strong tendency to form aggregates (book‐like structure) of micrometric size by stacking of clay platelets (Figure ). This structuration also explains the poor specific surface area of kaolinte (In the range 8–12 m 2 g −1 ) . Recent work shows that this trend is favored by the presence of organic matter adsorbed at the basal surface of kaolinite platelets …”

Section: Brief Statement On Kaolinite Chemistrymentioning

confidence: 95%

“…These are polar compounds and/or hydrogen bonds acceptors and donors (dimethylsulfoxide (DMSO), hydrazine, urea, N‐methylformamide (NMF), etc.) and few salts (acetates) . The intercalation of other compounds requires a guest‐displacement strategy, using a pre‐intercalate as starting material.…”

Section: Brief Statement On Kaolinite Chemistrymentioning

confidence: 99%

“…If these processes occur with some delay, the expanded layers will collapse and the parent kaolinite regenerated. Using this approach, several compounds were successfully intercalated and used for several environmental, energy and medical applications As other clay minerals, kaolinite displays functional groups (silanol (Si‐OH) and mainly aluminol (Al‐OH) functions) on particles basal surfaces and borders that can be functionalized.…”

Section: Brief Statement On Kaolinite Chemistrymentioning

confidence: 99%

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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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Section: Brief Statement On Kaolinite Chemistrymentioning

confidence: 95%

Section: Brief Statement On Kaolinite Chemistrymentioning

confidence: 99%

Section: Brief Statement On Kaolinite Chemistrymentioning

confidence: 99%

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Kaolinite Clay Mineral Reactivity Improvement through Ionic Liquid Functionalization

Dedzo

2018

Israel Journal of Chemistry

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“…11.2 Å indicating the intercalation of DMSO . The intercalation efficiency (E i ) is possible to be appreciated by comparing the d 001 intensities of the kaolinite original spacing (I KOS ) with that of the DMSO-KC spacing (I KC ) (Dedzo and Detellier, 2016) according to the equation:…”

Section: X-ray Diffractionmentioning

confidence: 99%

Evaluation of some intercalation methods of dimethylsulphoxide onto HCl-treated and untreated Egyptian kaolinite

Abou‐El‐Sherbini

Elzahany

Wahba

et al. 2017

Applied Clay Science

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“…8,13–15 The studies on kaolinite intercalation by surfactants with relatively large molecular size are rare due to the challenge of the intercalation process. However, the methanol intercalated kaolinite has been proven to be a versatile precursor that can be used for further intercalation and surface modification by surfactants as mentioned above.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Mechanism and Interfacial Structure of Kaolinite Intercalation and Surface Modification by Alkane Surfactants with Neutral and Ionic Head Groups

et al. 2017

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Intercalation and surface modification of clays with surfactants are the essential process to tailor the clays’ surface chemistry for their extended applications. A full understanding of the interaction mechanism of surfactants with clay surfaces is crucial to engineer clay surfaces for meeting a particular requirement of industrial applications. In this study, the thermodynamic mechanism involved in the intercalation and surface modification of methanol preintercalated kaolinite by three representative alkane surfactants with different head groups, dodecylamine, cetyltrimethylammonium chloride (CTAC), and sodium stearate, were investigated using the adaptive biasing force accelerated molecular dynamics simulations. In addition, the interaction energies of surfactants with an interlayer environment (alumina surface, siloxane surface, and interlayer methanol) of methanol preintercalated kaolinite were also calculated. It was found that the intercalation free energy of CTAC with a cationic head group was relatively larger than that of stearate with an anionic head group and dodecylamine with a neutral head group. The attractive electrostatic and van der Waals interactions of surfactants with an interlayer environment contributed to the intercalation and surface modification process with the electrostatic force playing the significant role. This study revealed the underlying mechanism involved in the intercalation and surface modification process of methanol preintercalated kaolinite by surfactants, which can help in further design of kaolinite-based organic clays with desired properties for specific applications.

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Functional nanohybrid materials derived from kaolinite

Cited by 69 publications

References 64 publications

Kaolinite Clay Mineral Reactivity Improvement through Ionic Liquid Functionalization

Kaolinite Clay Mineral Reactivity Improvement through Ionic Liquid Functionalization

Evaluation of some intercalation methods of dimethylsulphoxide onto HCl-treated and untreated Egyptian kaolinite

Thermodynamic Mechanism and Interfacial Structure of Kaolinite Intercalation and Surface Modification by Alkane Surfactants with Neutral and Ionic Head Groups

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