Equilibrium and dynamic interfacial behavior of tetra (2-ethyl hexyl) diglycolamide (TEHDGA) - TritonX-100 mixtures

Basu, M.; Choudhury, Sharmistha Dutta; Sharma, J. N.; Hassan, P. A.

doi:10.1016/j.molliq.2016.06.070

Cited by 4 publications

(4 citation statements)

References 26 publications

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“…Liquid‐liquid extraction procedure has been extensively employed for the separation and purification of target metal ions from the aqueous feed solution containing host of other metal ions . The aqueous solution employed in liquid‐liquid extraction is usually a nitric acid or hydrochloric acid medium and the organic phase is generally composed of a ligand or extractant diluted in an inert, hydrophobic medium known as diluent, in order to make a biphasic extraction system . n ‐Dodecane is generally used as a diluent in solvent extraction procedures.…”

Section: Introductionmentioning

confidence: 99%

“…n ‐Dodecane is generally used as a diluent in solvent extraction procedures. In contrast to the “inert” nature of diluent, the extractant requires polar functionalities, such as etheric, amidic or phosphoryl moieties etc., for coordination and subsequent separation of target metal ions from aqueous solution . However, to dissolve the polar extractants in a non‐polar diluent medium, the organic ligands are made with sufficiently organophilic character by attaching a long chain alkyl or aryl groups.…”

Section: Introductionmentioning

confidence: 99%

“…However, to dissolve the polar extractants in a non‐polar diluent medium, the organic ligands are made with sufficiently organophilic character by attaching a long chain alkyl or aryl groups. In view of this, the ligands employed in liquid–liquid extractions are usually amphiphilic, containing both polar metal coordinating functional groups and non‐polar organophilic moieties …”

Section: Introductionmentioning

confidence: 99%

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Dynamic Light Scattering and FTIR Spectroscopic Investigations on the Reverse Micelles Produced During the Extraction of Nd(III) and Nitric Acid in Tetra Ethylhexyl Diglycolamide

et al. 2017

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The aggregation behaviour of reverse micelles, formed during the extraction of neodymium nitrate and nitric acid, in an organic phase composed of tetra‐bis(2‐ethylhexyl) diglycolamide (TEHDGA) in n‐dodecane (n‐DD) was studied, at various temperatures. The organic phase, 0.2 M TEHDGA/n‐DD was equilibrated with aqueous solutions of nitric acid in the presence and absence of neodymium nitrate. At certain nitric acid and Nd(III) concentration in aqueous phase, the organic phase underwent splitting into two phases, with top phase known as “diluent rich phase”, the other one known as “third phase” or “metal ion rich phase”. Dynamic light scattering, attenuated total reflectance (ATR) ‐Fourier transform infrared (FTIR) spectroscopy and Raman spectroscopic methods were employed for probing the size and distribution of aggregates present in the organic phase before and after splitting. The investigations revealed that the aggregates, formed in organic phase, interact efficiently with the extracted metal ions and these interactions increased with increase in the concentration of nitric acid and neodymium nitrate in organic phase. In addition, the interaction among the reverse micelles in third phase appear to be very strong as compared to that observed in the organic phase before third phase formation, and such strong interactions resulted in a merger and narrow distribution of reverse micelles in third phase.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dynamic Light Scattering and FTIR Spectroscopic Investigations on the Reverse Micelles Produced During the Extraction of Nd(III) and Nitric Acid in Tetra Ethylhexyl Diglycolamide

et al. 2017

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“…However, the results show that the hydrophilic modification ability of PEG400 is weaker compared with the other two treatment methods. This is because given the condition of 25 • C and a standard atmospheric pressure, the surface tension of four concentrations of PEG400 is between 45-50 mN•m −1 , the surface tension of four concentrations of TritonX-100 is 40 ± 1 mN•m −1 , the surface tension of Tween-20 (0.5-1.0% v/v) is 20-30 and the surface tension of Tween-20 (1.5-2.0% v/v) is 5-10 mN•m −1 [20]. The reason for this phenomenon is that TritonX-100 and Tween-20 are amphiphilic compounds, and their hydrophobic ends will be arranged on the water surface, which destroys the interaction between water molecules on the liquid surface and reduces the surface tension of the liquid, while PEG400 is a high hydrophilic compound, which has no hydrophobic chain segment to destroy the interaction between water molecules on the liquid surface, resulting in high surface tension of the solution.…”

Section: Contact Angle Testmentioning

confidence: 99%

Surface Hydrophilic Modification for Chip of Centrifugal Microfluidic Immunoassay System

Shi

Wang

et al. 2022

Micromachines

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The surface of a centrifugal microfluidic immunoassay system chip such as polymethyl methacrylate (PMMA) is often hydrophobic, which leads to problems such as poor liquid transfer efficiency and easy-to-block siphon channels, leading to bad fluid control. Therefore, surface hydrophilic modification for such chips is necessary to improve the rapidity and sensitivity of the system. Chemical modification is commonly used, but there is little research on the hydrophilic effect of different concentrations of hydrophilic reagents. According to function requirements for different microchannels of the chip (some only need to ensure the liquid can flow into the next chamber, and some also need to ensure the function of “closing the door” during immunoassay incubation), we explored the best combination of hydrophilic reagent and concentration through experiments. Firstly, three hydrophilic reagents were used for modification. Secondly, the hydrophilic effects of different reagents and concentrations were explored by contact angle test, the influence of different modification methods on liquid transfer efficiency was characterized by residual liquid calculation in the chamber. Finally, the effect of different hydrophilic reagents on absorbance was also tested. By experimental results and comprehensively considering the stability of the modification effect and the function requirements, Tween-20 (2.0% v/v) was chosen as the modifying reagents of the first siphon valve and the second siphon valve, and TritonX-100 (2.0% v/v) was chosen for the third siphon valve, which effectively reduces the contact angle and improves the liquid transfer efficiency, leading to further improvement of the rapidity and sensitivity of the centrifugal microfluidic immunoassay system by efficient siphoning and high plasma separation efficiency (99%).

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Thermodynamics of Mixing of TEHDGA with Isodecanol in Dodecane: Effect of Equilibration with Aqueous Nitric Acid

et al. 2019

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Equilibrium and dynamic interfacial behavior of tetra (2-ethyl hexyl) diglycolamide (TEHDGA) - TritonX-100 mixtures

Cited by 4 publications

References 26 publications

Dynamic Light Scattering and FTIR Spectroscopic Investigations on the Reverse Micelles Produced During the Extraction of Nd(III) and Nitric Acid in Tetra Ethylhexyl Diglycolamide

Dynamic Light Scattering and FTIR Spectroscopic Investigations on the Reverse Micelles Produced During the Extraction of Nd(III) and Nitric Acid in Tetra Ethylhexyl Diglycolamide

Surface Hydrophilic Modification for Chip of Centrifugal Microfluidic Immunoassay System

Thermodynamics of Mixing of TEHDGA with Isodecanol in Dodecane: Effect of Equilibration with Aqueous Nitric Acid

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