Abnormal wetting behavior of supercooled deep eutectic solvents

Chang, Sheng-Hsiung; Sheng, Yu Jane; Tsao, Heng Kwong

doi:10.1016/j.molliq.2023.122617

Cited by 1 publication

(2 citation statements)

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“…However, a recent report indicates that it remains in a liquid state stably at room temperature below the eutectic point. 51 Therefore, the combination of choline chloride and citric acid is utilized as the solvent for gel-like materials. The influence of Carbopol concentration on the rheological behavior of the eutectogel is systematically explored.…”

Section: ■ Introductionmentioning

confidence: 99%

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Formation of Self-Healing Granular Eutectogels through Jammed Carbopol Microgels in Supercooled Deep Eutectic Solvent

Arjunan,

Weng,

Sheng

et al. 2024

Langmuir

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Typically, gel-like materials consist of a polymer network structure in a solvent. In this work, a gel-like material is developed in a deep eutectic solvent (DES) without the presence of a polymer network, achieved simply by adding microgels. The DES is composed of choline chloride and citric acid and remains stably in a supercooled state at room temperature, exhibiting Newtonian fluid behavior with high viscosity. When the microgel (Carbopol) concentration exceeds 2 wt %, the DES undergoes a transition from a liquid to a soft gel state, characterized as a granular eutectogel. The soft gel characteristics of eutectogels exhibit a yield stress, and their storage moduli exceed the loss moduli. The yield stress and storage moduli are observed to increase with increasing microgel concentration. In contrast, the ion conductivity decreases with increasing microgel concentration but eventually levels off. Because the eutectogel can dissolve completely in excess water, it is a physical gel-like material, attributed to the densely packed structure of microgels in the supercooled DES. Due to the absence of networks, the granular eutectogel has the capability to self-heal simply by being pushed together after being cut into two pieces.

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Section: ■ Introductionmentioning

confidence: 99%

“…The eutectic point of this DES was approximately 76 °C at a 3:1 molar ratio. However, a recent report indicates that it remains in a liquid state stably at room temperature below the eutectic point . Therefore, the combination of choline chloride and citric acid is utilized as the solvent for gel-like materials.…”

Section: Introductionmentioning

confidence: 99%