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首页> 外文期刊>The European physical journal, E. Soft matter >The effect of flow on viscoelastic emulsion microstructure
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The effect of flow on viscoelastic emulsion microstructure

机译：流动对粘弹性乳液微观结构的影响

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摘要

Emulsions made of oil, water and surfactants are widespread soft materials with complex structures depending on composition and temperature. Emulsion phase behavior at rest has been widely investigated but flow-induced effects, which are very relevant in many applications, can still be further explored towards improved emulsion microstructural design. In this work, we use low energy emulsification processing to create small-sized emulsions. In a previous report, we showed the emulsion morphology development and the effect of flow on the microstructure of a highly viscoelastic attractive emulsion which result in a concentrated nanoemulsion after viscoelastic droplet filaments are disrupted. Here, we show that upon stopping the flow, the filaments slowly buckle, recoil and finally form clusters of randomly flocculated droplets. We thus obtain two completely different emulsion morphologies simply induced by the action of flow, where in both cases attractive interactions play a key role. The emulsion high interfacial area represents a valuable feature for several applications such as upstream operations, microreaction media and drug delivery.
机译：由油，水和表面活性剂制成的乳液是具有复杂结构的广泛柔软的材料，这取决于组合物和温度。静止的乳液相行为已被广泛研究，但在许多应用中，流动诱导的效果仍然可以进一步探索改善乳液微观结构设计。在这项工作中，我们使用低能量乳化处理来产生小尺寸的乳液。在上一份报告中，我们展示了乳液形态的发展和流动对高粘弹性乳液的微观结构的影响，从而粘弹性液滴丝后导致浓缩纳米乳液被破坏。在这里，我们表明，在停止流动时，长丝缓慢地扣，反冲并最终形成随机絮凝的液滴的簇。因此，我们通过流量的作用获得了两个完全不同的乳液形态，在两种情况下有吸引力的相互作用发挥着关键作用。乳液高界面区域代表了诸如上游操作，微孔介质和药物递送的若干应用的有价值的特征。

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