Effect of taurate surfactant and polyvinylpyrrolidone on kaolinite suspension

Kwan, Chang‐Chin; Chiu, Wen-Huei; Chang, Nai-Fang; Wu, Pey-Shiuan; Huang, Keh‐Feng

doi:10.1016/j.colsurfa.2010.12.039

Cited by 9 publications

(4 citation statements)

References 35 publications

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“…This effect may have resulted from bridging flocculation, wherein nanosheets are connected to one another by PVP strands. 34,35 This effect may also have been due to centrifugation retardation due to higher viscosity of the suspension with increasing PVP and increasing nanosheet concentration. 36−38 By keeping PVP concentration constant at 1 mg mL −1 , C BP was measured versus C I .…”

Section: Resultsmentioning

confidence: 98%

“…However, C BP decreased when the polymer concentration was beyond 1 mg mL –1 . This effect may have resulted from bridging flocculation, wherein nanosheets are connected to one another by PVP strands. , This effect may also have been due to centrifugation retardation due to higher viscosity of the suspension with increasing PVP and increasing nanosheet concentration. − …”

Section: Results and Discussionmentioning

confidence: 99%

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Exfoliation of Stable 2D Black Phosphorus for Device Fabrication

et al. 2017

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Discovering stabilizers that protect phosphorene from oxidative degradation is critically required for dispersion processing of black phosphorus (BP). It is equally important to also find environmentally friendly, low-cost, and practical exfoliating media. Herein, we demonstrate the yield of remarkably stable phosphorene by coating with a polymer to shield the nanosheets from reaction with water and air. The polymer shell suppresses the rate of BP degradation more efficiently than previously reported systems. We present for the first time a simple kinetic model for exfoliation of BP in polyvinylpyrrolidone (PVP) ethanol solution that appears to quantitatively fit BP exfoliation data, and it illuminates mechanistic aspects of exfoliation. Exfoliated flakes consist of a high level of 51% crystalline single layers that are free from structural disorder or oxidation. A successive centrifugation and redispersion strategy is developed affording dispersions with high phophorene-to-stabilizer ratio, which is very useful for further applications. We also demonstrate that PVP-stabilized phosphorene dispersions possess saturable absorption at both 515 and 1030 nm, which have potential use as ultrafast broadband absorbers. Furthermore, such phosphorene dispersions were processed to prepare new metal/phosphorene nanocomposites that have potential for use as electrocatalysts in electrolytic cells.

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Section: Resultsmentioning

confidence: 98%

Section: Results and Discussionmentioning

confidence: 99%

Exfoliation of Stable 2D Black Phosphorus for Device Fabrication

et al. 2017

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“…The studies have usually focused on the achievement of rheologically stable dispersion (Husband, 1998;Mpofu et al, 2003;Ma, 2011;Rao et al, 2011), the electrokinetic properties of the system (Braggs et al 1994;Alkan et al, 2005;Lagaly, 2006;Chassagne et al, 2009;Amorós et al, 2010;Duman et al, 2012;Leong et al, 2012), the adsorption isotherms (Backfolk et al, 2001;Marco and Llorens, 2005;Hoch and Bandara, 2005;Backfolk et al, 2006;Kwan et al, 2006Kwan et al, , 2011Totland et al, 2011), and the identification of the reaction mechanism causing the dissolution of metal ions from the particles (Huertas et al, 1998(Huertas et al, , 1999Yuan et al, 1998;Zaman et al, 2003). Dodson and Somasundaran (1983) studied the desorption of polyacrylamide and hydrolyzed polyacrylamide from the kaolinite surface.…”

Section: Introductionmentioning

confidence: 99%

Experimental studies on the desorption of adsorbed sodium poly(acrylic acid) from crude kaolin particles

Demir

2015

Applied Clay Science

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“…Most of the industrial applications of clay minerals depend on the adsorption of polymers on clay raw material [1][2][3]. The clay-polymers interactions modify the physico-chemical properties of the clay particles.…”

Section: Introductionmentioning

confidence: 99%

Stabilizing Na-bentonite by Poly(Diallyl Dimethyl Ammonium Chloride) Adsorption

Khalek

El‐Midany

2021

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Clay minerals have been modified by polymers for different applications. The polymer addition affects not only the surface propertiesbut also the rheological properties and the stability of the clay-polymer suspension as a whole. In the current study, the electro-chemical properties of bentonite particles in presence of poly diallyl dimethyl ammonium chloride (PDDACl) were investigated. Theseproperties were characterized by as zeta potential, adsorption isotherm, Fourier transform infrared (FTIR) and the apparent viscosityat different solid percent. The results indicated that the viscosity of the bentonite-PDDACl suspension not only increases by raising thepolymer concentration but also by increasing solids %. Adsorption of PDDACl polymer increases the positivity of bentonite surfaceas a function of polymer concentration, which could be explained mainly by electrostatic interaction of deficient metal ions at theoctahedral sheets of bentonite with the cationic head group of the polymer. The PDDACl adsorption isotherm on bentonite fits moreprobably Langmuir than Freundlich isotherm

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Effect of taurate surfactant and polyvinylpyrrolidone on kaolinite suspension

Cited by 9 publications

References 35 publications

Exfoliation of Stable 2D Black Phosphorus for Device Fabrication

Exfoliation of Stable 2D Black Phosphorus for Device Fabrication

Experimental studies on the desorption of adsorbed sodium poly(acrylic acid) from crude kaolin particles

Stabilizing Na-bentonite by Poly(Diallyl Dimethyl Ammonium Chloride) Adsorption

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