Synergistic effect of Laponite RD and oil soluble surfactant in stabilization of miniemulsions

Dungen, Eric T. A. van den; Hartmann, Patrice C.

doi:10.1016/j.clay.2011.10.015

Cited by 12 publications

(8 citation statements)

References 10 publications

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“…The suspensions were prepared44 by first dispersing Laponite in deionized water (0.16 μS/cm at 25 °C) using an IKA WERKE Ultra-Turrax ® T25 basic homogeniser (rotor-stator) with a 1.8 cm head operating at 17,500 rpm for 30 min while cooling the sample in an ice/water bath. Laponite-salt (NaCl) suspensions were prepared by adding salt into Laponite RD ® dispersions using an ultrasonic bath (40 kHz for at least 40 min).…”

Section: Methodsmentioning

confidence: 99%

Transition from glass- to gel-like states in clay at a liquid interface

Gholamipour‐Shirazi

Carvalho

Huila

et al. 2016

Sci Rep

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Colloidal clay in water suspensions are known to exhibit a multitude of bulk phases depending on initial colloidal concentration and ionic strength, and examples of this include repulsive Wigner colloidal glasses at low ionic strength and attractive gels at higher ionic strength due to screened electrostatic forces by the electrolyte. From confocal Raman microscopy combined with elasticity measurements, we infer that clay trapped at quasi two-dimensional interfaces between oil and water also exhibit confined glass-like or gel-like states. The results can be important for the preparation of particles stabilized colloidal emulsions or colloidal capsules, and a better understanding of this phenomenon may lead to new emulsion or encapsulation technologies.

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Section: Methodsmentioning

confidence: 99%

Transition from glass- to gel-like states in clay at a liquid interface

Gholamipour‐Shirazi

Carvalho

Huila

et al. 2016

Sci Rep

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“…Laponite-based hydrogel formation is due to the reticulation that occurs in the polymer. This gel can also be formed if certain components are added to it, such as H 2 SO 4 or KNO 3 [274][275][276][277][278][279][280][281][282][283][284][285][286][287][288]. By means of Lap membranes, another study accomplished the removal of up to 100% of two organic dyes, namely Rhodamine B (cationic dye) and Brilliant Blue (anionic dye) [288].…”

Section: Laponitementioning

confidence: 99%

“…It possesses permanent negative charges due to isomorphic substitution. Depending on the temperature, the concentration it is found at, and the curing time, it can come as a viscous gel that breaks in aqueous solution or forms a translucent fluid[278][279][280][281]. In the textile industry, it can act as a perfect additive for pigments because it protects them from environmental factors, such as temperature and oxygen, and improves the pigment's final stability[282][283][284][285].Some studies have demonstrated the adsorption capacity of laponite-based hydrogels[286] and their CEC is 74 cmol•kg −1[287].…”

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confidence: 99%

Uses of Nanoclays and Adsorbents for Dye Recovery: A Textile Industry Review

et al. 2021

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Wastewater recovery is one of the most pressing contaminant-related subjects in the textile industry. Many cleaning and recovery techniques have been applied in recent decades, from physical separation to chemical separation. This work reviews textile wastewater recovery by focusing on natural or synthetic nanoclays in order to compare their capabilities. Presently, a wide variety of nanoclays are available that can adsorb substances dissolved in water. This review summarizes and describes nanoclay modifications for different structures (laminar, tubular, etc.) to compare adsorption performance under the best conditions. This adsorbent capacity can be used in contaminant industries to recover water that can be used and be recontaminated during a second use to close the production circle. It explores and proposes future perspectives for the nanoclay hybrid compounds generated after certain cleaning steps. This is a critical review of works that have studied adsorption or desorption procedures for different nanoclay structures. Finally, it makes a future application proposal by taking into account the summarized pros and cons of each nanoclay. This work addresses contaminant reuse, where part of the employed dyes can be reused in printing or even dyeing processes, depending on the fixing capacity of the dye in the nanoclay, which is herein discussed.

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“…Laponite is a disc-shaped crystal of about 25 nm in diameter and 1 nm in thickness, extensively used as particle stabilizer of O/W emulsions. [28][29][30][31] Laponite is very pure and possesses small and uniform particle size, all of which favor the preparation of O/W emulsions having small droplet sizes after its wettability is carefully tuned by modification with either cationic surfactants 32 or small surfactant-like molecules. 28,31 Our previous research has also demonstrated that laponite is a competent particle stabilizer for an aqueous emulsion of ASA after inclusion of tetramethylammonium chloride, urea, alanine, and melamine.…”

Section: Introductionmentioning

confidence: 99%

Unique alkyl ketene dimer Pickering‐based dispersions: Preparation and application to paper sizing

Zhao

Liu

et al. 2017

J of Applied Polymer Sci

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Herein, particle-stabilized alkyl ketene dimer (AKD) dispersions were prepared using dodecyl trimethyl ammonium chloride (DTAC)-modified laponite as the stabilizer, and sodium alginate (SA) as the protective colloid. The modification of laponite particles with DTAC, which was characterized by transmission electron microscopy, infrared spectroscopy, and X-ray diffraction technique, moderately decreases the negative zeta potential and causes the dehydration of laponite particles. Consequently, the modification of laponite promotes the absorption of laponite particles on AKD droplets/spherical particle surfaces, leading to formation of AKD dispersions with reduced particle size and enhanced uniformity when DTAC-to-laponite mass ratio is <1%. Meanwhile, SA significantly increases the stability of the AKD dispersions and provides stable AKD dispersions with smaller particles when SA-to-AKD mass ratio is <0.08%. By means of confocal laser scanning microscopy, scanning electron microscope imaging and energy dispersive spectroscopy (EDS)/EDS mapping, the function of DTAC-modified laponite particles in stabilization of AKD dispersions was found to include both formation of a particle barrier around AKD particles and an increase in the moving resistance of AKD particles by laponite particles with SA. AKD dispersions at a DTAC-to-laponite mass ratio 1.0% and SA-to-AKD mass ratio 0.054% provide the smallest droplet size and best sizing performance.

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Synergistic effect of Laponite RD and oil soluble surfactant in stabilization of miniemulsions

Cited by 12 publications

References 10 publications

Transition from glass- to gel-like states in clay at a liquid interface

Transition from glass- to gel-like states in clay at a liquid interface

Uses of Nanoclays and Adsorbents for Dye Recovery: A Textile Industry Review

Unique alkyl ketene dimer Pickering‐based dispersions: Preparation and application to paper sizing

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