The micellar and thermophysical studies of a surfactant, sodium dodecyl sulfate with a hydrotrope, 3-Nitrobenzene sulfonic acid sodium salt

Alam, Md. Sayem; Rajendran, Sumitha Kanniappan; Mondal, Julfikar Hassan; Linda, Evangeline; Siddiq, A. Mohammed

doi:10.1016/j.molliq.2020.113815

Cited by 11 publications

(4 citation statements)

References 36 publications

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“…To explain the observed structural preservation of the fractionated lignin by 4-Cl-BSA, we proposed two preliminary mechanisms accordingly: segregation (the solubilized lignin) and coexistence (the deposited lignin) (Figure ). The proposed two preservation mechanisms were logically deduced from the experimental results (Figure and Table ) and the previous studies on lignin ,− and other substances. − The liquid phase was composed of water, 4-Cl-BSA, the solubilized lignin, and hemicellulose sugars. At the mesoscale level, the liquid phase is divided into the hydrophobic domain and the aqueous domain .…”

Section: Results and Discussionmentioning

confidence: 84%

“…Owing to the nature of amphiphilicity, the aggregation/clustering behavior of 4-Cl-BSA in water is affected by the hydrophobic hydration of the chloro-substituted benzene ring and the hydrophilic hydration of the sulfonic acid group . With an increase in temperature, the hydrophobic hydration decreases while the hydrophilic hydration increases, causing a slight increase in the critical aggregation concentration . Although the measured critical aggregation concentrations indirectly verified the occurrence of the aggregation/clustering of 4-Cl-BSA in water, further studies are necessary to accurately determine the number of molecules required to form aggregate, and the type and size of the formed aggregate …”

Section: Results and Discussionmentioning

confidence: 90%

“…37 With an increase in temperature, the hydrophobic hydration decreases while the hydrophilic hydration increases, causing a slight increase in the critical aggregation concentration. 38 Although the measured critical aggregation concentrations indirectly verified the occurrence of the aggregation/clustering of 4-Cl-BSA in water, further studies are necessary to accurately determine the number of molecules required to form aggregate, and the type and size of the formed aggregate. 30 Mesoscale Solubilization of Lignin by 4-Cl-BSA.…”

Section: ■ Experimental Sectionmentioning

confidence: 92%

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Fractionation of Poplar Wood Using a Bifunctional Aromatic Acid under Mild Conditions

Zhuang

Jiang

et al. 2021

ACS Sustainable Chem. Eng.

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The development of an energy-efficient fractionation process as well as the preservation of the fractionated cellulose, hemicellulose sugars, and lignin are the key to the valorization of lignocellulose. This study presents a mild-condition fractionation process based on a recyclable and bifunctional 4-chlorobenzenesulfonic acid (4-Cl-BSA). The aqueous (e.g., 72%) 4-Cl-BSA solution near-completely fractionated unmilled poplar chips at 50–80 °C for 18–180 min and successively preserved the theoretical maximum yields and key structures of the fractionated cellulose, lignin, and hemicellulose sugars. Around 21.3–27.8% lignin was hydrotropically dissolved at a mesoscale level through accumulation by and complexation with 4-Cl-BSA and its aggregates. The solubilized lignin preserved about 24.7–50.7% of the 61% β-O-4 linkages in the native lignin and about 48.3–82% aromatic units uncondensed. About 72.2–78.7% lignin was insolubilized and quickly deposited on the surfaces of cellulose fibers. Remarkably, the deposited lignin preserved about 61.9–81.1% of the β-O-4 linkages in the native lignin and about 78.2–86.2% aromatic units uncondensed. Hemicellulose sugars and cellulose (millimeter-size, CrI: 71–75, DPv: 910–1022) had high purity and high quality. Compared to the other selected aryl sulfonic acids whether they have or do not have substituents (dichloro, bromo, hydroxyl, and methyl) and mineral acids, 4-Cl-BSA performed better in fractionating unmilled poplar chips and preserving the β-O-4 linkages and aromatic units of lignin. The results indicate that both acidity and hydrophobicity of aryl sulfonic acid greatly influence its fractionation and preservation performances.

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Section: Results and Discussionmentioning

confidence: 84%

Section: Results and Discussionmentioning

confidence: 90%

Section: ■ Experimental Sectionmentioning

confidence: 92%

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Fractionation of Poplar Wood Using a Bifunctional Aromatic Acid under Mild Conditions

Zhuang

Jiang

et al. 2021

ACS Sustainable Chem. Eng.

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“…Akin to surfactants that aggregate into micelles above the critical micellar concentration (CMC), hydrotropes self-associate above their minimum hydrotrope concentration (HMC) , and can reduce the surface tension of water . The hydrophobic portion of hydrotropes is either short alkyl groups or aromatic rings as opposed to long hydrocarbon chains in surfactants (C 16 –C 18 ), resulting in higher hydrophilic/lipophilic balance (HLB)a factor that accounts for the higher concentration of hydrotrope (μmolL –1 to mmolL –1 ) required for solubilization. ,,, Hydrotropes have been utilized, since their inception, to improve the water solubility of a wide range of organic compounds, namely, drugs and biochemicals. − They often improve the micellization property of surfactants through synergistic noncovalent interactions. − The differential solvent affinity of the constituent ions has been exploited for various extraction-related applications. − The dissolved solute can be precipitated and recovered effortlessly by diluting the hydrotropic solution. , …”

Section: Introductionmentioning

confidence: 99%

Elucidating the Hydrotropic Mechanism of the Antagonistic Salt PPh₄Cl

2023

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PPh4Cl is an antagonistic salt that recently showed promise as a hydrotropic agent. Here, we give mechanistic insights into the PPh4Cl-assisted solubility of a dye molecule using molecular dynamics simulations. Our findings reveal that dye molecules aggregate into a cluster which leads to an accumulation of PPh4 + ions in its vicinity and subsequent exclusion of water molecules from the region. The structural organization is attributed to the preferential interaction of dye molecules and PPh4Cl. The origin of such preference arises from the difference in π–π and CH–π interaction among the pairs. The hydrodynamic radius of PPh4Cl indicates a low propensity for cluster formation, which enhances its hydrotropic behavior. The process of dye dissolution is thermodynamically favored and occurs through a cooperative mechanism. Our studies provide molecular insight into experimental observations crucial for the design of novel hydrotropes with enhanced solubilizing properties.

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Micellization Behavior and Thermodynamic Characteristics of Saponin and SDS: The Impact of Silica Nanoparticles for Subsurface Formation Interaction Studies

Muneer,

Alimkulov,

Eghtesadi

et al. 2024

ChemistrySelect

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This study investigates the temperature‐dependent micellization behaviors of saponin and sodium dodecyl sulfate (SDS) surfactants, which are both important for chemical enhanced oil recovery (CEOR). It also evaluates the effect of silica nanoparticles (SiO2) on these behaviors, given the growing interest in nanoparticle‐enhanced surfactants. The research focuses on the tunable properties of nanoparticle‐surfactant combinations. The structural differences between saponin and SDS were identified using FT‐IR and H‐NMR. The Du Noüy ring method was used to measure surface tension at various concentrations and temperatures (25–75 °C). FTIR analysis showed distinct differences between SDS and Saponin, associated with head group where there is hydroxyl groups in SDS solution. H‐NMR showed higher complexity of Saponin's structure, evidenced by its diverse sugar‐related proton peaks. Both SDS and Saponin reduce surface tension with temperature; SDS is more effective, lowering it to 42.1 mN/m versus 48.5 mN/m for Saponin. With SiO2, tensions drop to 39.2 mN/m for SDS and 45.5 mN/m for Saponin. Both surfactants maintain CMCs under reservoir temperature in the 0.05–0.1 wt % range. Saponin exhibited a more negative ΔG° and consistently negative ΔH°, indicating a thermodynamically favorable exothermic reaction. The novelty of this study lies in its focus on both anionic and nonionic surfactants under simulated reservoir conditions. The study focuses on the role of nanoparticles in enhancing surfactant stability and efficiency by addressing thermodynamic parameters.

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The micellar and thermophysical studies of a surfactant, sodium dodecyl sulfate with a hydrotrope, 3-Nitrobenzene sulfonic acid sodium salt

Cited by 11 publications

References 36 publications

Fractionation of Poplar Wood Using a Bifunctional Aromatic Acid under Mild Conditions

Fractionation of Poplar Wood Using a Bifunctional Aromatic Acid under Mild Conditions

Elucidating the Hydrotropic Mechanism of the Antagonistic Salt PPh₄Cl

Micellization Behavior and Thermodynamic Characteristics of Saponin and SDS: The Impact of Silica Nanoparticles for Subsurface Formation Interaction Studies

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The micellar and thermophysical studies of a surfactant, sodium dodecyl sulfate with a hydrotrope, 3-Nitrobenzene sulfonic acid sodium salt

Cited by 11 publications

References 36 publications

Fractionation of Poplar Wood Using a Bifunctional Aromatic Acid under Mild Conditions

Fractionation of Poplar Wood Using a Bifunctional Aromatic Acid under Mild Conditions

Elucidating the Hydrotropic Mechanism of the Antagonistic Salt PPh4Cl

Micellization Behavior and Thermodynamic Characteristics of Saponin and SDS: The Impact of Silica Nanoparticles for Subsurface Formation Interaction Studies

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Product

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Elucidating the Hydrotropic Mechanism of the Antagonistic Salt PPh₄Cl