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Gardolinski, J. E. F. C.; Carrera, Luiz Carlos Marques; Cantão, Maurício Pereira

doi:10.1023/a:1004820003253

Cited by 120 publications

(53 citation statements)

References 12 publications

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“…Many studies have been recently focusing on the development and characterization of new nanocomposites exhibiting anisotropic morphologies [8][9][10][11][12][13][14]. Specific mechanical and physical properties are expected when the filler particles are plateletshaped [15,16].…”

Section: Introductionmentioning

confidence: 99%

Morphological study of magnesium hydroxide nanoparticles precipitated in dilute aqueous solution

Henrist

Mathieu

Vogels

et al. 2003

Journal of Crystal Growth

330

216

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Among other applications, magnesium hydroxide is commonly used as a flame-retardant filler in composite materials, as well as a precursor for magnesium oxide refractory ceramic. The microstructure of the powder is of prime importance in both technical applications. The influence of synthesis parameters on the morphological characteristics of magnesium hydroxide nanoparticles precipitated in dilute aqueous medium was studied. Several parameters were envisaged such as chemical nature of the base precipitant, type of counter-ion, temperature and hydrothermal treatment. Special attention was given to the obtaining of platelet-shaped, nanometric and de-agglomerated powders. The powders were characterized in terms of particle size distribution, crystal habits, morphology and ability to be redispersed in water. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption and laser diffusion analyses were used for this purpose. r

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Section: Introductionmentioning

confidence: 99%

Morphological study of magnesium hydroxide nanoparticles precipitated in dilute aqueous solution

Henrist

Mathieu

Vogels

et al. 2003

Journal of Crystal Growth

330

216

View full text Add to dashboard Cite

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“…This can be done either by mixing them together at a temperature above the melting of the polymer, or by using an aqueous suspension of the inorganic filler in the case of emulsion polymerization. Besides, many studies have been recently devoted to the development and characterization of new nanocomposites exhibiting anisotropic morphologies [1][2][3][4][5][6][7]. Specific mechanical and physical properties are expected when the filler particles are not spherical but elongated in one dimension (fibers) or two dimensions (platelets) [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…The Cu 2 (OH) 3 NO 3 structure has been recently re-examined by Guillou et al [23] and belongs to the P2 1 + . Consequently, NO 3 À ions stand between the positive layers for charge balancing and are linked by hydrogen bonding to the hydroxyl groups belonging to the copper octahedra layers (Fig.…”

Section: Introductionmentioning

confidence: 99%

Study of the morphology of copper hydroxynitrate nanoplatelets obtained by controlled double jet precipitation and urea hydrolysis

Henrist

Traina

Hubert

et al. 2003

Journal of Crystal Growth

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A copper hydroxynitrate of stoichiometry Cu 2 (OH) 3 NO 3 , analogous to the layered double hydroxide family, was synthesized by the so-called controlled double jet precipitation technique, and by hydrolysis of urea in the presence of copper nitrate. Special attention has been focused on the size, morphology and agglomeration tendency of the particles. The aim of this work is to define the optimum precipitation conditions in terms of quality and dispersability of the recovered product. Such platelet-like particles can be used as anisotropic fillers in nanocomposite materials. Several reaction parameters such as flow and concentration of the reactant solutions, design of the reactor and addition of a growth modifier were studied. r

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“…Fabrication of nano-kaolinite composites is an important approach to enlarge the application range of kaolinite and intercalation is the most effective method to prepare nano-kaolinite currently. 6,7 Because the adjacent layers of kaolinite are linked by hydrogen bonds without exchangeable positive ions between layers, only a few varieties of micromolecules (e.g., dimethyl sulfoxide, 8,9 urea, 10 potassium acetate [11][12][13] and hydrazine hydrate 14 ) can enter into the interlayer directly, whereas the other non-polar micromolecules and macromolecules enter into the interlayer through "displacement". In 1999, Komori et al 15 prepared a kaolinite-alkylamine intercalation compound through secondary displacement and tentatively studied the property of this compound.…”

Section: Introductionmentioning

confidence: 99%

Structural Model and De-Intercalation Kinetics of Kaolinite-Methanol-Sodium Stearate Intercalation Compound

Sen¹,

Zuo²,

Cheng³

et al. 2016

Journal of the Brazilian Chemical Society

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Kaolinite-methanol-sodium stearate intercalation compound (Ka-MeOH-SS) was prepared by intercalation of kaolinite with dimethyl sulfoxide (DMSO) followed by displacing of DMSO with methanol and methanol by sodium stearate. The sample was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermal analysis (thermogravimetry (TGA) and differential scanning calorimetry (DSC)) and transmission electron microscopy (TEM). The results show that the basal spacing of Ka-MeOH-SS was enlarged to 45.5-47.9 Å and parts of its layers cocked and curled. Stearate ions were grafted on the methoxy groups and arrayed aslant in the interlayer space of kaolinite with an inclination angle of 47.45° to 52.17°. Sodium ions were adsorbed around the SiO 4 tetrahedron and interlayer carboxylate anions, whereas some of them entered into the ditrigonal hole of tetrahedral sheets. The thermal de-intercalation of Ka-MeOH-SS includes three steps and the activation energy E is 98.3 kJ mol −1 , logarithm of pre-exponential factor lg(A / s -1 ) is 9.71 and the mechanism function is f(α) = −ln (1 − α) and G(α) = 1 − α.

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Cited by 120 publications

References 12 publications

Morphological study of magnesium hydroxide nanoparticles precipitated in dilute aqueous solution

Morphological study of magnesium hydroxide nanoparticles precipitated in dilute aqueous solution

Study of the morphology of copper hydroxynitrate nanoplatelets obtained by controlled double jet precipitation and urea hydrolysis

Structural Model and De-Intercalation Kinetics of Kaolinite-Methanol-Sodium Stearate Intercalation Compound

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