Mixtures of cationic guar gum and anionic surfactants as stabilizers of zirconia suspensions

Grządka, E.; Matusiak, Jakub; Godek, E.; Maciołek, Urszula

doi:10.1016/j.molliq.2021.117677

Cited by 9 publications

(9 citation statements)

References 49 publications

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“…Besides, the complexes formed through electrostatic interactions were stable at oil–water interfaces, as the surfactant could partially solubilize in dodecane while anchoring ChNC nanoparticles at the interface. This is the first evidence of ChNC/surfactant colloidal interactions, which follow similar trends to those observed in polyelectrolyte–surfactant systems. ,,,− …”

Section: Resultssupporting

confidence: 78%

Control of the Colloidal and Adsorption Behaviors of Chitin Nanocrystals and an Oppositely Charged Surfactant at Solid, Liquid, and Gas Interfaces

Su,

Wan,

et al. 2024

Langmuir

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Chitin has a unique hierarchical structure, spanning the macro-and nanoscales, and presents chemical characteristics that make it a suitable component of multiphase systems. Herein, we elucidate the colloidal interactions between partially deacetylated chitin nanocrystals (cationic ChNC) and an anionic surfactant, sodium dodecyl sulfate (SDS). We investigate charge neutralization and association (electrophoretic mobility, surface tensiometry, and quartz crystal microgravimetry) and their role in the stabilization of Pickering emulsions. We find SDS adsorption and association with ChNC under distinctive regimes: At low SDS concentration, submonolayer assemblies form on ChNC, driven by the hydrophobic effect and electrostatic interactions. With the increased SDS concentration, bilayers or patchy bilayers form, followed by adsorbed hemimicelles and micelles. We further suggested the role of hydrophobic effects in the observed colloidal transitions and complex conformations. At the highest SDS concentration tested, charge neutralization and SDS/ChNC flocculation take place. Remarkably, at given concentrations, adsorbed SDS endows the chitin nanoparticles with an effective hydrophobicity that opens the opportunity to achieve tailorable Pickering stabilization. Hence, a facile route is proposed by in situ modification by SDS physisorption, which extends the potential of renewable nanoparticles in the formulation of complex fluids, for instance, those relevant to household and healthcare products.

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Section: Resultssupporting

confidence: 78%

Control of the Colloidal and Adsorption Behaviors of Chitin Nanocrystals and an Oppositely Charged Surfactant at Solid, Liquid, and Gas Interfaces

Su,

Wan,

et al. 2024

Langmuir

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“…Among various cationic biopolymers, quaternized derivative of guar gum is reported as one of the most important derivatives that is used for diverse applications such as flocculant, [19,20] in-vitro drug release, [21] paper strengthening, [22] suspension stabilization, [23] hydrogel preparation, [24] multilayer [25] and nano-biocomposite [26] and bioadhesive [27] films, etc.…”

Section: Introductionmentioning

confidence: 99%

Efficient Synthesis of Quaternised Guar Gum using Tri‐alkylamine and Epichlorohydrin Condensate by Taguchi L9 Orthogonal Array

2022

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Glycidyltrimethylammonium chloride (GLYTAC) is an efficient quaternizing reagent, easy to synthesize, and causes lesser degradation to the polymer backbone than other reagents. Quaternization of guar gum was carried out using condensate of trimethylamine and epichlorohydrin as etherifying reagents adopting Taguchi's L9 orthogonal array design of experiment to optimize the reaction conditions to attain a higher degree of substitution (DS). The set of optimized levels of selected control factors are as follows; 2.5 mL and 1.2 g of condensate and sodium hydroxide respectively at 30 °C and time 6 h. The DS of the quaternized derivative prepared under optimized reaction conditions was determined as 0.046. The appearance of an additional signal at 3.06 ppm and 54.62 in 1 H and 13 C and the corresponding cross signal inHSQC ( 1 HÀ 13 C) confirmed the synthesis of quaternized guar gum. The study demonstrated that Taguchi L 9 orthogonal array is a reliable statistical approach for efficient and green synthesis of quaternized derivatives.

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“…However, considering the neutral character of the surfactant, it could not be clearly stated whether the working concentrations at the phase-separation region had already been exceeded or whether it had not yet been reached, but it was clear that the phase separation, if it occurs, could not be mediated through the neutralization of the polymer charges. Further insights on the complex formation process may be obtained from electrophoretic mobility and surface tension measurements, especially for diluted mixtures [ 50 , 51 , 52 ]. However, the use of the interpretation of the results obtained from these techniques in concentrated mixtures such as those studied in this work remains challenging.…”

Section: Resultsmentioning

confidence: 99%

Study of the Dilution-Induced Deposition of Concentrated Mixtures of Polyelectrolytes and Surfactants

et al. 2022

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Mixtures of polyelectrolytes and surfactants are commonly used in many technological applications where the challenge is to provide well-defined modifications of the surface properties, as is the case of washing formulations in cosmetics. However, if contemporary experimental and theoretical methods can provide insights on their behavior in concentrated formulations, less is known on their behavior under practical use conditions, e.g., under dilution and vectorization of deposits. This makes it difficult to make predictions for specific performance, as, for example, good hair manageability after a shampoo or a comfortable sensorial appreciation after a skin cleanser. This is especially important when considering the formulation of new, more eco-friendly formulations. In this work, a detailed study of the phase separation process induced by dilution is described, as well as the impact on the deposition of conditioning material on negatively charged surfaces. In order to gain a more detailed physical insight, several polyelectrolyte–surfactant pairs, formed by two different polymers and five surfactants that, although non-natural or eco-friendly, can be considered as models of classical formulations, have been studied. The results evidenced that upon dilution the behavior, and hence its deposition onto the surface, cannot be predicted in terms of the behavior of simpler pseudo-binary (mixtures of a polymer and a surfactant) or pseudo-ternary mixtures (two polymers and a surfactant). In many cases, phase separation was observed for concentrations similar to those corresponding to the components in some technological formulations, whereas the latter appeared as monophasic systems. Therefore, it may be assumed that the behavior in multicomponent formulations is the result of a complex interplay of synergistic interactions between the different components that will require revisiting when new, more eco-sustainable ingredients are considered.

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Mixtures of cationic guar gum and anionic surfactants as stabilizers of zirconia suspensions

Cited by 9 publications

References 49 publications

Control of the Colloidal and Adsorption Behaviors of Chitin Nanocrystals and an Oppositely Charged Surfactant at Solid, Liquid, and Gas Interfaces

Control of the Colloidal and Adsorption Behaviors of Chitin Nanocrystals and an Oppositely Charged Surfactant at Solid, Liquid, and Gas Interfaces

Efficient Synthesis of Quaternised Guar Gum using Tri‐alkylamine and Epichlorohydrin Condensate by Taguchi L9 Orthogonal Array

Study of the Dilution-Induced Deposition of Concentrated Mixtures of Polyelectrolytes and Surfactants

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