Colloidal clay in water suspensions are known to exhibit a multitude of bulk phases depending on initial colloidal concentration and ionic strength, and examples of this include repulsive Wigner colloidal glasses at low ionic strength and attractive gels at higher ionic strength due to screened electrostatic forces by the electrolyte. From confocal Raman microscopy combined with elasticity measurements, we infer that clay trapped at quasi two-dimensional interfaces between oil and water also exhibit confined glass-like or gel-like states. The results can be important for the preparation of particles stabilized colloidal emulsions or colloidal capsules, and a better understanding of this phenomenon may lead to new emulsion or encapsulation technologies.

译文

:已知水悬浮液中的胶体粘土会根据初始胶体浓度和离子强度表现出多种相,例如,低离子强度的排斥性Wigner胶体玻璃和较高离子强度的有吸引力的凝胶(通过筛选静电力可得到)电解质。从共焦拉曼显微镜结合弹性测量,我们可以得出结论,在油和水之间的准二维界面处捕获的粘土也表现出受限的玻璃状或凝胶状状态。结果对于制备颗粒稳定的胶体乳液或胶体胶囊可能很重要,对这种现象的更好理解可能会导致新的乳液或封装技术。

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