Structured liquids with interfacial robust assemblies of a nonionic crystalline surfactant
| Autor: | Shoki Tanaka, Yuuki Hata, Toshiki Sawada, Shohei Yoneda, Takeshi Serizawa |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Drop (liquid) Ionic bonding Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials Solvent Colloid and Surface Chemistry Pulmonary surfactant Chemical engineering Phase (matter) Monolayer Self-assembly 0210 nano-technology |
| Zdroj: | Journal of Colloid and Interface Science. 590:487-494 |
| ISSN: | 0021-9797 |
| DOI: | 10.1016/j.jcis.2021.01.064 |
| Popis: | Hypothesis The structuring of liquids, that is, the kinetic trapping of nonequilibrium shapes of liquid–liquid interfaces, shows great promise for various applications, especially all-liquid devices. The strategies reported thus far to stabilize such unstable states include interfacial jamming of large colloidal particles and interfacial coassembly of elaborate molecules and/or nanoparticles. However, the structuring of liquids using a simple molecular surfactant has not been sufficiently demonstrated. We hypothesized that a surfactant with strong intermolecular interactions would form interfacial assemblies that behave substantially as solid particles for the structuring of liquids. Experiments n-Octyl cello-oligosaccharide, a novel nonionic surfactant developed recently was explored as a candidate because of the ability of cello-oligosaccharides to form robust crystalline assemblies. Interfacial assembly of the nonionic crystalline surfactant was investigated for various water–organic solvent interfaces via pendant drop tensiometry and emulsification. Findings The crystalline surfactant was found to self-assemble and form a crystalline monolayer at water–organic solvent interfaces, allowing arrested shape changes of the liquid–liquid interfaces. Irregular-shaped liquid droplets were successfully created under various solution conditions, such as various organic solvents for the oil phase and the water phase with high ionic strengths and harsh pH values. |
| Databáze: | OpenAIRE |
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