Liquid emulsion droplet evaporation is of importance for various sensing and imaging applications. The liquid-to-gas phase transformation is typically triggered thermally or acoustically by low–boiling point liquids, or by inclusion of solid structures that pin the vapor/liquid contact line to facilitate heterogeneous nucleation. However, these approaches lack precise tunability in vaporization behavior. Here, we describe a previously unused approach to control vaporization behavior through an endoskeleton that can melt and blend into the liquid core to either enhance or disrupt cohesive intermolecular forces. This effect is demonstrated using perfluoropentane (C₅F₁₂) droplets encapsulating a fluorocarbon (FC) or hydrocarbon (HC) endoskeleton. FC skeletons inhibit vaporization, whereas HC skeletons trigger vaporization near the rotator melting transition. Our findings highlight the importance of skeletal interfacial mixing for initiating droplet vaporization. Tuning molecular interactions between the endoskeleton and droplet phase is generalizable for achieving emulsion or other secondary phase transitions, in emulsions.

液体乳液液滴蒸发对于各种传感和成像应用非常重要。液气相变通常由低沸点液体以热或声学方式触发，或者通过包含固定气/液接触线以促进异质成核的固体结构来触发。然而，这些方法缺乏汽化行为的精确可调性。在这里，我们描述了一种以前未使用过的方法，通过内骨骼控制汽化行为，该内骨骼可以熔化并混合到液体核心中，以增强或破坏分子间的内聚力。使用封装碳氟化合物 (FC) 或碳氢化合物 (HC) 内骨架的全氟戊烷 (C ₅ F ₁₂ ) 液滴证明了这种效应。 FC 骨架抑制汽化，而 HC 骨架在旋转器熔化转变附近引发汽化。我们的研究结果强调了骨架界面混合对于引发液滴汽化的重要性。调节内骨架和液滴相之间的分子相互作用可普遍用于在乳液中实现乳液或其他二次相变。