Research progress on nanoparticle stabilizing Pickering emulsion and droplet coalescence dynamics

doi:10.11949/0438-1157.20230752

Abstract

Abstract:

Emulsion is a good dispersion system, which could be used in medicine, food, materials and other fields. Nanoparticles could effectively improve the stability of the emulsion, accordingly, the studies on nanoparticles stabilizing emulsions and droplet coalescence dynamics are of critical importance for the preparation and application of stable emulsions. The wettability, size, shape, concentration of nanoparticles and charge type carried by nanoparticles all affect the interaction between nanoparticles and droplets, and then affect the coalescence behavior between droplets. This article introduces the interaction mechanism between nanoparticles and droplets, reviews the research progress of droplet aggregation dynamics, and looks forward to future research directions.

Key words: nanoparticles, droplet, coalescence, dynamics, simulation, emulsions

摘要：

乳液是一种良好的分散体系，可用于医药、食品、材料等领域。纳米粒子可以有效提高乳液的稳定性，因此，纳米粒子稳定乳液及液滴聚并动力学研究对于稳定乳液的制备及应用具有重要意义。纳米粒子润湿性、尺寸、形状、浓度、携带电荷类型等均会对颗粒与液滴间的相互作用产生影响，进而影响液滴间的聚并行为。对纳米粒子与液滴间的作用机制进行了介绍，并对液滴的聚并动力学研究进展进行了综述，同时对未来的研究方向进行了展望。

关键词: 纳米粒子, 液滴, 聚并, 动力学, 模拟, 乳液

CLC Number:

TQ 021.1

Wenqi ZHAO, Yanjun DENG, Chunying ZHU, Taotao FU, Youguang MA. Research progress on nanoparticle stabilizing Pickering emulsion and droplet coalescence dynamics[J]. CIESC Journal, 2024, 75(1): 33-46.

赵文琪, 邓燕君, 朱春英, 付涛涛, 马友光. 纳米粒子稳定的Pickering乳液及其液滴聚并动力学研究进展[J]. 化工学报, 2024, 75(1): 33-46.

Figures/Tables 11

Fig.1 Bending behavior of emulsion droplets coated in particles[48]

Fig.2 Adsorption of nanoparticles on the droplet interface[31]

Fig.3 Adsorption of nanoparticles with different shape on surface of droplet

Fig.4 Confocal laser scanning microscopy images show the morphology of microparticles at Pickering emulsion interfaces with solid particles measuring 1.1 μm in diameter[72]

Fig.5 The snapshots of flocculated droplets in emulsions[73]

Fig.6 The droplet flow patterns observed in the T-junction microchannel[98]

Fig.7 Mechanism of the effects of nanoparticles on droplet coalescence[27]

Fig.8 Effect of adsorption of nanoparticles on liquid film drainage process[99]

Fig.9 Shape evolution of coalesced droplets[106]

Fig.10 Evolution of droplet interface morphology[87]

Fig.11 Droplet size evolution and growth mechanism in the absence and presence of NPs (w/d: water in dodecane; w/k: water in kerosene)[114]

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