Elucidating the stability dynamics of double emulsions is essential for advancing their sustainable applications in the food industry. This study utilizes microfluidic techniques to investigate the interactions between interfacial components, Tween 80 (Tw80) and zein particles (ZPs), in double emulsions. Our results indicate that the type and concentration of stabilizing agents are critical to emulsion stability with environmental factors further influencing this balance. Specifically, emulsions stabilized by Tw80 primarily exhibited instability through the expulsion of internal droplets (Pe). In contrast, emulsions with ZP concentrations below 0.5% experienced instability due to the coalescence of oil droplets (Po), while those with ZPs concentrations above 0.5% showed instability through Pe, attributed to decreased interfacial relaxation and elasticity. Environmental factors, such as pH, NaCl, and alginate, significantly modulated this stability. Interfacial rheological analyses demonstrated a strong correlation between the emulsion stability and the viscoelastic properties of interfacial films. Lissajous plots revealed that alginate enhanced the elasticity of interface films formed by Tw80 and ZPs, thereby improving the emulsion stability. Additionally, environmental modifications, such as NaCl introduction or pH adjustments, weakened the Tw80 interface strength but accelerated ZP adsorption, ultimately increasing deformation resistance and reducing Pe. This study underscores the potential of microfluidic technologies in advancing colloid and interface science, providing a foundation for the innovative design and precise manipulation of double emulsions.

中文翻译：

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使用微流体技术由玉米醇溶蛋白颗粒和表面活性剂稳定的液的界面动力学和环境响应性


阐明双重乳液的稳定性动力学对于推进其在食品工业中的可持续应用至关重要。本研究利用微流体技术研究液中界面成分 Tween 80 （Tw80） 和玉米醇溶蛋白颗粒 （ZP） 之间的相互作用。我们的结果表明，稳定剂的类型和浓度对乳液稳定性至关重要，环境因素进一步影响这种平衡。具体来说，由 Tw80 稳定的乳液主要通过排出内部液滴 （Pe） 表现出不稳定性。相比之下，ZP 浓度低于 0.5% 的乳液由于油滴 （Po） 的聚结而表现出不稳定，而 ZP 浓度高于 0.5% 的乳液通过 Pe 表现出不稳定性，这归因于界面松弛和弹性降低。环境因素，如 pH 、 NaCl 和藻酸盐，显著调节了这种稳定性。界面流变学分析表明，乳液稳定性与界面膜的粘弹性之间具有很强的相关性。Lissajous 图显示，海藻酸盐增强了 Tw80 和 ZPs 形成的界面膜的弹性，从而提高了乳液的稳定性。此外，环境改性，如 NaCl 引入或 pH 调节，削弱了 Tw80 界面强度，但加速了 ZP 吸附，最终增加了变形阻力并降低了 Pe。本研究强调了微流控技术在推进胶体和界面科学方面的潜力，为液的创新设计和精确操作奠定了基础。