ODTMA+ and HDTMA+ organo-montmorillonites characterization: New insight by WAXS, SAXS and surface charge

Bianchi, Ana Elisa; Fernández, Mariela Alejandra; Pantanetti, M.; Viña, R.; Torriani, Iris Concepcion Linares de; Sánchez, Rosa M. Torres; Punte, G.

doi:10.1016/j.clay.2013.08.032

Cited by 52 publications

(58 citation statements)

References 51 publications

(82 reference statements)

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“…This fact can be explained by the incomplete neutralization and/or partial screening of the MMT surface at low BODMA + /BODMA-Cl contents, and the composite uptake of protons on the reactive sites [39]. In contrast, the amount of BODMA-Cl that was added over the CEC could lead to the external surface being covered extensively in the bilayer conformation and/or micelle arrangement with hydrophilic groups facing towards the aqueous phase [27]. This would result in abundant positive charges on the modified MMT surface.…”

Section: Zeta Potential Analysesmentioning

confidence: 84%

“…4. A stable zeta potential of approximately −35 mV was observed for the original MMT independently of pH, because of its predominant charges on the layer surfaces (pH-independent) over the layer edges (pH-dependent) [27,38]. Through the modification of MMT by the addition of BODMA-Cl, the surface charge is reversed from negative to positive.…”

Section: Zeta Potential Analysesmentioning

confidence: 95%

“…This indicates that BODMA + /BODMA-Cl has been incorporated into the interlayer. Assuming that the layer thickness of MMT is 0.97 nm [27], the d 001 -values of 1.96, 2.09, 3.56 and 3.66 nm correspond to interlayer distances of 0.99, 1.12, 2.59 and 2.69 nm for BODMA-0.5-MMT, BODMA-1-MMT, BODMA-2-MMT and BODMA-4-MMT, respectively. Previous studies have reported on several configuration modes for cationic surfactants in the MMT interlamellar space by considering the surfactant molecular size and the interlayer distances, such as lateral monolayer, lateral bilayer, paraffin monolayer, paraffin bilayer and pseudo-trilayer [14,28].…”

Section: Adsorption Experimentsmentioning

confidence: 99%

See 2 more Smart Citations

Surfactant-modified montmorillonite by benzyloctadecyldimethylammonium chloride for removal of perchlorate

Luo

Sasaki

Hirajima

2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Section: Zeta Potential Analysesmentioning

confidence: 84%

Section: Zeta Potential Analysesmentioning

confidence: 95%

Section: Adsorption Experimentsmentioning

confidence: 99%

See 1 more Smart Citation

Surfactant-modified montmorillonite by benzyloctadecyldimethylammonium chloride for removal of perchlorate

Luo

Sasaki

Hirajima

2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…Fig. 1(c) shows the typical morphology of unmodified clay with curved plates either with face-to-edge contacts between particles or covered by small and well-separated particles [29]. Fig.…”

Section: Resultsmentioning

confidence: 99%

Comparison of different modified aluminosilicate networks for the removal of diclofenac

Gamboa

Ramírez-García

Solache‐Ríos

et al. 2016

Desalination and Water Treatment

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A B S T R A C TDifferent modified hexadecyltrimethylammonium (HDTMA) aluminosilicate networks were used to remove diclofenac (DS) from aqueous solutions, in order to know how important the networks of the aluminosilicates in adsorption processes are. HDTMA modified zeolitic tuff and HDTMA modified clay samples were characterized by X-ray Diffraction, Thermal Gravimetric Analysis, Fourier Transform Infrared Spectroscopy, and Scanning Electron Microscopy. The adsorption kinetics data were described by the pseudo-second-order kinetic model, and the Langmuir model described the isotherm of DS by the HDTMA modified zeolitic tuff (SMZ-25 and SMZ-50) which indicated chemical adsorption on homogeneous materials. The equilibrium isotherms for HDTMA modified clay (SMC-50) followed a linear behavior which is characteristic of sorption of organic solutes sorption by the partition mechanism. The maximum sorption capacities were 0.826 ± 0.004 mg/g for SMZ-25 and 0.880 ± 0.012 mg/g for SMC-50. According to the kinetic and isotherm results, SMZ-25 and SMC-50 showed the best properties to remove DS from aqueous solutions.

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“…Among nanofillers, clay minerals such as montmorillonites (Mts) have been of interest for the development or improvement of composite material properties due to their availability, low cost, and rich chemistry on their surfaces . Mts have a 2:1 layer structure.…”

Section: Introductionmentioning

confidence: 99%

Acrylonitrile butadiene nanocomposites containing different clays by latex compounding method

Cova

Fernández

et al. 2018

Polymer Engineering & Sci

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Considering elastomers nanocomposites, most of the works are focused on natural rubber, styrene butadiene rubber and rubber blends, while few of them deal with nitrile butadiene rubber (NBR). This article presents the reinforcing effect of two raw sodic montmorillonites (Mts) and one organoclay on NBR matrix prepared by the latex compounding method. Raw Mts increase the mechanical properties of neat matrices. A pseudoplastic behavior is observed with the incorporation of clays into the NBR latex, indicating interactions between polymer chains and clay sheets, in agreement with the results of zeta potential analysis. X‐ray diffraction evaluates changes in the interlayer distance of the clay, indicating the NBR intercalation phenomenon in all cases. Matrices with different clay proportions present variations in the mechanical properties, depending if the aggregation phenomenon is promoted. Morphological analysis of clays and nanocomposites as well as thermal analysis were performed. The variation in mechanical properties after an aging process was studied, evaluating the effects on the tensile strength, ultimate strain and 300% modulus. POLYM. ENG. SCI., 59:736–744, 2019. © 2018 Society of Plastics Engineers

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ODTMA+ and HDTMA+ organo-montmorillonites characterization: New insight by WAXS, SAXS and surface charge

Cited by 52 publications

References 51 publications

Surfactant-modified montmorillonite by benzyloctadecyldimethylammonium chloride for removal of perchlorate

Surfactant-modified montmorillonite by benzyloctadecyldimethylammonium chloride for removal of perchlorate

Comparison of different modified aluminosilicate networks for the removal of diclofenac

Acrylonitrile butadiene nanocomposites containing different clays by latex compounding method

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