Intercalation of a block co-polymer in kaolinite

Fafard, Jonathan; Detellier, Christian

doi:10.1016/j.jcis.2015.03.025

Cited by 13 publications

(5 citation statements)

References 69 publications

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“…Kaolinite is much more abundant in nature than smectites and has the ability to form covalent bonds with organic compounds via the hydroxyl groups on the inner and outer surfaces of clay mineral. In contrast to intercalated complexes [31][32][33][34][35], grafted kaolinites [36][37][38][39][40][41][42][43][44] are much more stable, making them suitable for applications in separation sciences [44,45]. Despite these advantages, the use of natural or modified kaolinites in electrochemistry as electrode materials was only very recently developed, and remains an under developed field of study [46][47][48][49][50][51].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Organophilic Nanohybrid Kaolinite and Application to the Electrochemical Detection of Organic Pesticide

2017

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Novel organophilic nanohybrid materials (K‐TDD) were obtained by the grafting of 1,2‐tetradecanediol (TDD) onto the surface of kaolinite (K). XRD, IR, TGA‐DTG, and SEM characterization showed that TDD grafting results in a partial exfoliation of kaolinite layers. This material was used to modify a glassy carbon electrode (GCE/K‐TDD) and applied for the trace analysis of methyl parathion (MP). The signal of MP recorded on GCE/K‐TDD was more intense compared to the unmodified GCE or to one modified with a film of natural kaolinite. Several parameters that can affect the stripping response were systematically investigated to optimize the sensitivity of the organokaolinite‐modified electrode. A linear calibration curve for MP was obtained in the concentration range from 2×10−6 to 14×10−6 mol .L−1 in acetate buffer (pH 6), giving a detection limit of 9×10−8 mol .L−1. The sensitivity of the method was found to be 2.42 μA/μM for the range of concentrations that gives a linear calibration curve. The electrode was shown to be very stable, with the electrochemical response of MP decreasing by only 1.5 % after a series of nine measurements. The interference of various inorganic ions and organic compounds likely to influence the stripping determination of the MP were also examined. The results showed that the GCE/K‐TDD electrode was effective in solutions containing interfering species and could be applied for the quantification of MP pesticide in natural water.

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Section: Introductionmentioning

confidence: 99%

Preparation of Organophilic Nanohybrid Kaolinite and Application to the Electrochemical Detection of Organic Pesticide

2017

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“…Other kaolinite‐based CPN were obtained by polymerization of intercalated monomers, such as, without being exhaustive, polyacrylamide, poly(vinylpyrrolidone), polystyrene, poly(3,4‐ethylenedioxythiophene) (PEDOT), polymethacrylamide or polyaniline . The direct intercalation of poly(vinylpyrrolidone) was also obtained by displacement from a kaolinite‐methanol precursor and an intercalated CPN was reported in the case of a block co‐polymer …”

Section: Intercalation In Kaolinite and Delaminationmentioning

confidence: 93%

Functional Kaolinite

Detellier

2018

The Chemical Record

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The world resources of all clays are extremely large. Among the various types of clays, the world mine production of kaolin in 2016 was 37.0 Mt, the largest mined clay. Kaolin is traditionally used in ceramics, refractories and as paper coating and filling. But kaolin, as it is demonstrated in this paper, has a bright potential for use in non-traditional, high value-added, applications. This is particularly true for its principal component: the mineral species kaolinite which has a chemical structure allowing its functionalization, leading to a variety of potential applications. Kaolinite is a layered 1 : 1 clay mineral, the layer being made of two different sheets, a tetrahedral silica sheet and an octahedral alumina sheet. Large dipole-dipole interactions, in addition to a network of H-bonds, link the siloxane surface of a layer to the aluminol surface of another layer, making intercalation of guest species in kaolinite challenging. There is however a limited number of molecular units (molecules or salts) that can directly intercalate in kaolinite to form "pre-intercalates". Once intercalated these molecular units can be exchanged by a large number and variety of guests, providing access to the interlayer space of kaolinite, and to its reactive aluminol internal surfaces. The intercalation of molecules of pharmacological interest showed the potential of kaolinite to act as a slow-releasing agent for drugs, and the intercalation of polymers resulted in the creation of intercalated nanocomposites. The intercalation of ionic liquids gave materials with ionic conductivity properties in the solid-state. Intercalates are however unstable in water. One needed to make these organo-inorgano nanohybrid materials resistant to hydrolysis and more thermally stable. The network of aluminol groups on the internal surfaces of kaolinite offers the opportunity to design and create controlled organo-inorgano nanohybrid materials, taking advantage of their reactivity, in particular with hydroxyl groups of organic compounds, to form Al-O-C bonds. A functional, two-dimensional, spatially restricted, environment can be created with controlled nanoarchitecture. The grafting of organic groups on the aluminol internal carpets has allowed applications in catalysis, in sensing, in heavy metals adsorption, in exfoliated nanocomposite, in luminescence, and in structural modifications to form nanoscrolls or nanorolls. This paper shows how the future of the use of kaolinite will shift from its traditional uses in ceramics, tiles and paper coating to more sophisticated, high value-added, uses. In particular, research should amplify in the years to come to design an efficient and cost-effective method to produce kaolinite with nanotubular morphology. One can foresee also that efficient, easy-to-use, electrochemical devices based on modified kaolinite, will be created to quantify selectively a variety of pollutants in waste waters.

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“…7 As a biocompatible natural polysaccharide, chitosan enhances not only the plasticity but also the intermolecular force of composites. 10 As one of the most important inorganic fillers with plasticity and agglutination for the fabrication of polymer composites, kaolin is economical and abundant reserves. 9 In order to overcome these difficulties, inorganic filler is applied for inserting into the polymer chains to destroy hydrogen bonds and crystallization.…”

Section: Introductionmentioning

confidence: 99%

“…9 In order to overcome these difficulties, inorganic filler is applied for inserting into the polymer chains to destroy hydrogen bonds and crystallization. 10 As one of the most important inorganic fillers with plasticity and agglutination for the fabrication of polymer composites, kaolin is economical and abundant reserves. 11 It possesses high surface energy and strong interfacial interactions on molecular chains to improve mechanical properties of composites.…”

Section: Introductionmentioning

confidence: 99%

Effects of different silane coupling agents on structure and properties of starch–chitosan–kaolin composites

Zhang

Xing

et al. 2019

J of Applied Polymer Sci

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Effects of different silane coupling agents on clay surface modification were studied. Herein, functionalized superfine kaolin was compounded with starch-chitosan (SCS) to prepare starch-chitosan-functionalized superfine kaolin composite. The characterization results showed that kaolin (K) was successfully modified; the composite formed a dense intercalated structure. The glass-transition temperature (T g ) was measured by differential scanning calorimetry and dynamic mechanical analysis. It decreased by 60 C which attested the crystallinity of SCS. The results of thermogravimetric analysis showed that the fastest weight-loss temperature (T max ) was elevated by over 50 C for composites. Mechanical properties of the composites were explored by electronic universal testing machine. Tensile strength and elongation of composites were improved by 4.7 and 10.9 times.

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Intercalation of a block co-polymer in kaolinite

Cited by 13 publications

References 69 publications

Preparation of Organophilic Nanohybrid Kaolinite and Application to the Electrochemical Detection of Organic Pesticide

Preparation of Organophilic Nanohybrid Kaolinite and Application to the Electrochemical Detection of Organic Pesticide

Functional Kaolinite

Effects of different silane coupling agents on structure and properties of starch–chitosan–kaolin composites

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