Gemini surfactant modified clays: Effect of surfactant loading and spacer length

Taleb, Khadidja; Pillin, Isabelle; Grohens, Yves; Saïdi-Besbes, Salima

doi:10.1016/j.clay.2018.03.015

Cited by 57 publications

(34 citation statements)

References 42 publications

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“…The first mass loss associated with the desorption of interlayer water was lower for the organobentonites (<1%) than the pristine sample, which was attributed to the hydrophilic character of the samples after the organofunctionalization (Moslemizadeh et al, 2016;Santos et al, 2018). The thermal elimination of alkyl surfactants proceeded at temperatures above 473 K. The second, third, fourth and fifth events in the TG curves of the hybrids were attributed to loss of the surfactant moieties and are in agreement with the literature (Park et al, 2011;Zhu et al, 2012;Taleb et al, 2018). Ma et al (2015) observed a single mass loss with a maximum at 579 K in the DTG curve and attributed the mass loss to the desorption of the surfactant.…”

Section: Thermogravimetry (Tg)supporting

confidence: 87%

“…For example, for the solids modified with C 18 , the difference was 0.98 nm, which corresponds to the arrangement of the surfactant ions in a bilayer parallel to plane of the layers (Figure 2). The obtained thicknesses of the intercalated surfactants were, therefore, 0.98 nm, and this value is approximately double the thickness of the 14 surfactant, which is known to be 0.51-0.67 nm for the hydrophilic head group from other studies, thus confirming a bilayer arrangement (Daoudi et al, 2013;Park et al, 2017;Taleb et al, 2018). Therefore, the obtained values were higher than 0.95 nm for all of the prepared organobentonites, indicating a bilayer arrangement of the alkyl ammonium cations with charged surfactant head groups disposed alternatively in the interlayer spacing of the montmorillonite.…”

Section: Xrdsupporting

confidence: 62%

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Organophilic bentonites obtained by microwave heating as adsorbents for anionic dyes

Brito

Filho²,

Fonseca

et al. 2018

Journal of Environmental Chemical Engineering

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Section: Thermogravimetry (Tg)supporting

confidence: 87%

Section: Xrdsupporting

confidence: 62%

Organophilic bentonites obtained by microwave heating as adsorbents for anionic dyes

Brito

Filho²,

Fonseca

et al. 2018

Journal of Environmental Chemical Engineering

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Section: Introductionmentioning

confidence: 99%

“…Although these and several similar studies have been conducted over the years and may appear to be satisfactory, a concern was recently raised by Taleb et al with regard to the insufficient information available on the effect of structural parameters on the arrangement of gemini surfactant molecules into the interlayer space (Taleb et al, ). While this concern was subjected to the adsorption mechanism of surfactants on silicate‐layered materials, an equivalent issue of sporadic information on dimeric surfactants in the field of textile wet and finishing processing has been witnessed.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of A‐B‐A‐Type Nonionic Dimeric Dispersants for Pigment Dispersion

Acheampong

Zhang

Agbo

et al. 2019

J Surfact & Detergents

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An acid‐catalyzed esterification method was employed to synthesize five A‐B‐A‐type nonionic dimeric surfactants (XOP‐3, XOP‐4, XOP‐6, XOP‐9, and XOP‐10) comprising of octyl phenyl ether (OP‐10) and a homologous series of α, ω‐dicarboxylic acids (C3, C4, C6, C9, and C10) as the spacer molecules. The various surfactants produced were characterized based on Fourier transform infrared (FT‐IR) spectroscopy, mass spectra (MS), and 1H NMR spectra. The newly synthesized series of surfactants were used for the dispersion of Hostaperm Pink E (Pigment Red 122) in an ultrasonic disruptor. Based on the selected pigment, the interfacial, colloidal, and rheological properties of the pigment dispersion were examined. The dispersion performances and properties of the surfactants produced differed based on the number of carbon atoms in hydrocarbon chains of the various spacer molecules. Due to this, surfactants created with short to moderate hydrocarbon chain spacer molecules exhibited a better dispersion performance than that of surfactants created with long hydrocarbon chain spacer molecules. The calculated cross‐sectional area values of the various surfactants synthesized confirmed their differences in dispersion performance and properties.

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“…Yunfei Xi and his co-writers reported that variation in the d (001) was a step function of octadecyl trimethyl ammonium bromide concentration, the arrangement of surfactant between MT layers changed stepwise from monolayer to pseudo trimolecular layer with the increase of concentration of surfactant [7]. Taleb et al proposed that the thermal stability of organo-MT was better when Na-MT is modified by surfactant with higher concentration and longer carbon chain [23]. Zhuang et al concluded that organo-MT prepared by surfactant with bigger size and lower Hydrophile-Lipophile Balance value could be easier to exfoliate in oil [17].…”

mentioning

confidence: 99%

Comprehensive Characterization of the Structure and Gel Property of Organo-Montmorillonite: Effect of Layer Charge Density of Montmorillonite and Carbon Chain Length of Alkyl Ammonium

et al. 2020

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In this work, the effect of layer charge density of Na-montmorillonite (Na-MT) and carbon chain length of alkyl ammonium on the structure and gel property of organo-montmorillonite (organo-MT) was studied by using X-ray diffraction (XRD), Fourier transform infrared (FTIR), thermogravimetric (TG) analysis, contact angle test, molecular dynamics (MD) simulation, and gel apparent viscosity determination experiment. The results of XRD show that Na-MT with lower layer charge density is easier to swell after intercalation of alkyl ammonium, and the basal spacing of organo-MT increases with the increase of carbon chain length. The results of FTIR show that the absorption bands at 2924 cm −1 and 2853 cm −1 shift towards low frequency region with the increase of carbon chain length, and the absorption bands at 515 cm −1 and 463 cm −1 move towards high frequency region when the layer charge density increases. The mass loss of organo-MT evidently increases with the increase of layer charge density of Na-MT or carbon chain length of alkyl ammonium. The contact angle test results are well in line with the TG data and reveal that alkyl ammonium with longer carbon chain can significantly improve the hydrophobicity of organo-MT. MD simulation indicates that, when the layer charge density is low, the distribution of alkyl ammonium gradually changes from parallel double layers to partially inclined distribution with the increase of carbon chain length, but when the layer charge density is high, the distribution of alkyl ammonium gradually changes from three layers into four layers. The test results of the apparent viscosity of the gel formed by organo-MT in xylene show that the apparent viscosity of organo-MT gel is negatively correlated with the layer charge density of Na-MT and positively correlated with the carbon chain length of alkyl ammonium. ability in aqueous solution, MT has attracted wide attention both in academia and in industry [3][4][5][6]. The occurrence of non-equivalent isomorphic substitution of Al 3+ for Si 4+ in the tetrahedral sheets and Mg 2+ for Al 3+ in the octahedral layers makes MT layers negatively charged [7]. To balance the negative layer charge density of MT, some hydrophilic exchangeable cations, such as Na + , K + , and Ca 2+ , are usually attracted into the interlayer domain, and due to the hydration of inorganic cation [8,9], confined basal spacing, and high surface energy, natural MT performs badly in organic phase environment [6,10].In order to expand the application of MT in industry, organo-MT is synthesized by intercalating surfactant into interlayer space of natural MT [11]. In this way, interlayer distance of MT obviously increase and new sorption sites can be formed [12], besides, inorganic cation can be exchanged by surfactant, which results in that the surface property of MT converts from hydrophilic to hydrophobic. As a result, the organo-MT can be applied in many fields, such as polymer MT nanocomposite [13,14], adsorbent for organic contaminant [15,16], oil-based drilling fluid [17], ...

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Gemini surfactant modified clays: Effect of surfactant loading and spacer length

Cited by 57 publications

References 42 publications

Organophilic bentonites obtained by microwave heating as adsorbents for anionic dyes

Organophilic bentonites obtained by microwave heating as adsorbents for anionic dyes

Synthesis and Characterization of A‐B‐A‐Type Nonionic Dimeric Dispersants for Pigment Dispersion

Comprehensive Characterization of the Structure and Gel Property of Organo-Montmorillonite: Effect of Layer Charge Density of Montmorillonite and Carbon Chain Length of Alkyl Ammonium

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