Structural, thermal, morphological and surface charge properties of dodecyltrimethylammonium-smectite composites

Çağlar, Bülent; Topçu, Cihan; Çoldur, Fatih; Sarp, Gökhan; Çağlar, Sema; Tabak, Ahmet Fatih; Şahin, Erdal

doi:10.1016/j.molstruc.2015.10.017

Cited by 24 publications

(16 citation statements)

References 57 publications

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“…The primary amide NH2 asymmetric stretching occurred at 3353 cm −1 (SX-1, THAAB) and the symmetric stretching band of NH2 appeared at 3159 cm −1 (AM). The stretching C-H vibrations are present in the region 2970-2850 cm −1 [25]. The bending vibrations of water molecules present in the AMPS and in KBr were identified in the shift range of 1690-1630 cm −1 .…”

Section: Ir Characterization Of Sx-1mentioning

confidence: 92%

“…The second stage took place in the temperature range 225-341 • C with a loss of 44.5 mass (%), and was probably mainly due to the decomposition of amide and quaternary ammonium groups. The third one occurred in the 341-475 • C temperature range with a prodigious loss of 30.6 mass (%), which can be mainly ascribed to the decomposition of SX-1, due to the degradation of C-C bonds in the main chain [25]. The final stage, in the temperature range 475-800 °C, showed the main structure of SX-1 to be mostly destroyed.…”

Section: Tga-dsc Measurementmentioning

confidence: 97%

“…As shown in Figure 9, the particle size of Na-MMT in distilled water was tiny, only 8.05 µm. For copolymer SX-1 (Figure 8, red), the characteristic bands include the primary amide NH2 asymmetric stretching at 3353 cm −1 , and the symmetric stretching band of NH2 at 3159 cm −1 [25,26]. In the spectrum of the Na-MMT/SX-1 composite material (Figure 8, blue) there occurs an absorption band at 1618 cm −1 , assigned to the primary amide C=O stretching (CONH2), while the absorption band at 1400 cm −1 corresponds to COO-stretching, which suggests the successful incorporation of SX-1 into Na-MMT [27][28][29].…”

Section: Particle Distribution Testsmentioning

confidence: 99%

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The Inhibition Property and Mechanism of a Novel Low Molecular Weight Zwitterionic Copolymer for Improving Wellbore Stability

Slaný

Wang

et al. 2020

Polymers

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In this work, a novel low molecular weight zwitterionic copolymer for improving wellbore stability, which is expected to be an alternative to the current shale inhibitors, was obtained by copolymerization of tris hydroxyethyl allyl ammonium bromide (THAAB), 2-acrylamido-2- methyl propane sulfonic acid (AMPS) and acrylamide (AM), initiated by a redox initiation system in an aqueous solution. The copolymer, denoted as SX-1, was characterized by FT-IR, TGA-DSC, and GPC. Results demonstrated that the molecular weight of SX-1 was approximately 13,683 g/mol and it displayed temperature resistance up to 225 °C. Regarding the inhibition performance, evaluation experiments showed the hot rolling recovery of a Longmaxi shale sample in 2.0 wt % SX-1 solutions was up to 90.31% after hot rolling for 16 h at 120 °C. The Linear swelling height of Na-MMT artificial core in 2.0 wt % SX-1 solution was just 4.74 mm after 16 h. Methods including particle size analysis, FTIR, XRD, and SEM were utilized to study the inhibition mechanism of SX-1; results demonstrated that SX-1 had entered into the inner layer of sodium montmorillonite (Na-MMT) and adsorbed on the inner surface, and the micro-structure of Na-MMT was successfully changed by SX-1. The particle size of Na-MMT in distilled water was 8.05 μm, and it was observed that its size had increased to 603 μm after the addition of 2.0 wt % of SX-1. Its superior properties make this novel low molecular weight copolymer promising for ensuring wellbore stability, particularly for high temperature wells.

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Section: Ir Characterization Of Sx-1mentioning

confidence: 92%

Section: Tga-dsc Measurementmentioning

confidence: 97%

Section: Particle Distribution Testsmentioning

confidence: 99%

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The Inhibition Property and Mechanism of a Novel Low Molecular Weight Zwitterionic Copolymer for Improving Wellbore Stability

Slaný

Wang

et al. 2020

Polymers

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“…Four (CH 3 ) 2 N + ions as bromide salts have been used in solid-state intercalation reactions with two natural clays of smectite type collected in the Eastern part of Burkina Faso. Clays modified with quaternary alkylammoniums derivatives such as n-hexadecyltrimethylammonium and ndodecytrimethyl-ammonium bromides have been reported in a number of studies [12,21,24,29,30,31], those intercalated with n-tetradecyltrimethylammonium and di-ndodecyldimethylammonium bromides have only been the subject of a limited number of studies [21,23,24,29,32].…”

Section: Introductionmentioning

confidence: 99%

Solid-state synthesis and physico-chemical characterization of modified smectites using natural clays from Burkina Faso

Garikoé¹,

Sorgho²,

Guel³

et al. 2021

Bull. Chem. Soc. Eth.

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Solid-state intercalation was applied to prepare organo-smectites using cationic surfactants and natural clays containing smectite at various surfactant/smectite ratios. The surfactants enter the interlayers of smectites causing a swelling of the clays. The used clays were collected in Siétougou and Diabari villages located in the eastern part of Burkina Faso. The solid-state intercalation was successful for all four surfactants applied, n-dodecyltrimethylammonium bromide, (n-C12H25(CH3)3NBr), n-tetradecyltrimethylammonium bromide, (n-C14H29(CH3)3NBr), n-hexadecyltrimethylammonium bromide (n-C16H33(CH3)3NBr) and di-n-dodecyldimethylammonium bromide ((n-C12H25)2(CH3)2NBr) at different levels of the cation exchange capacity (CEC). The synthesized organo-smectites were characterized regarding relative density, structural and textural properties. XRPD data showed a systematic increase of the basal spacing of the unit cell of the smectite up to >38 Å at 2.0-CEC loading of the surfactant. This increase indicates that the surfactants penetrated into the smectite interlayers with the surfactants being arranged parallel to the layers at low concentrations and almost perpendicular at high ones. FTIR spectra of the organo-smectites showed a decrease in the intensities of the water bands at around 1630 cm-1 and 3400 cm-1, and new specific bands close to 2920 cm-1 and 2850 cm-1 were assigned to the asymmetric and symmetric stretching of CH2 groups of the surfactants, respectively. KEY WORDS: Smectite, Organo-smectite, Surfactant, Intercalation Bull. Chem. Soc. Ethiop. 2021, 35(1), 43-59. DOI: https://dx.doi.org/10.4314/bcse.v35i1.4

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“…According to the literature data, the thickness of the montmorillonite unit is 9.70 Å and the molecular dimension of DDTMA is approximately 3.8 Å in height and 18.0 Å in length when the alkyl chain of the DDTMA is parallel to the plane of montmorillonite [54,55]. Thus, it is assumed that the obtained d-value indicates a horizontal arrangement of surfactant molecules in the interlayer spaces [56].…”

Section: Discussionmentioning

confidence: 99%

Sorption of Molybdates and Tungstates on Functionalized Montmorillonites: Structural and Textural Features

et al. 2019

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Montmorillonite—the most popular mineral of the smectite group—has been recognized as a low-cost, easily available mineral sorbent of heavy metals and other organic and inorganic compounds that pollute water. The aim of this work was to determine the sorption mechanism and to identify the reaction products formed on the surface of montmorillonite and organo-montmorillonite after sorption of molybdates (Mo(VI)) and tungstates (W(VI)). Montmorillonites are often modified to generate a negative charge on the surface. The main objective of the study was to investigate and compare the features of Na-montmorillonite (Na-M), montmorillonite modified with dodecyl trimethyl ammonium bromide (DDTMA-M), and montmorillonite modified with didodecyl dimethyl ammonium bromide (DDDDMA-M) before and after sorption experiments. The material obtained after sorption was studied by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The XRD pattern showed the presence of a new crystallic phase in the sample that was observed under an SEM as an accumulation of crystals. The FTIR spectra showed bands related to Mo–O and W–O vibration (840 and 940 cm−1, respectively). The obtained results suggest that molybdenum(VI) and tungsten(VI) ions sorb onto the organo-montmorillonite in the form of alkylammonium molybdates and tungstates.

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Structural, thermal, morphological and surface charge properties of dodecyltrimethylammonium-smectite composites

Cited by 24 publications

References 57 publications

The Inhibition Property and Mechanism of a Novel Low Molecular Weight Zwitterionic Copolymer for Improving Wellbore Stability

The Inhibition Property and Mechanism of a Novel Low Molecular Weight Zwitterionic Copolymer for Improving Wellbore Stability

Solid-state synthesis and physico-chemical characterization of modified smectites using natural clays from Burkina Faso

Sorption of Molybdates and Tungstates on Functionalized Montmorillonites: Structural and Textural Features

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