发表机构
University of Amsterdam; Wageningen University and Research; IFP Energies nouvelles; ESPCI Paris, Université PSL, CNRS（阿姆斯特丹大学; 瓦赫宁根大学和研究中心; IFP能源新动力; 巴黎高等物理化工学院，巴黎文理研究大学，法国国家科学研究中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究结合微流控EDGE张力计与非平衡热力学描述，确定表面活性剂传质、吸附等参数，实现对动态界面张力的预测，为解析表面活性剂吸附动力学提供定量框架。
AI 中文摘要
在短时间内，界面张力取决于实验几何结构，因为表面活性剂向界面的传输依赖于传质条件。因此，要获得预测性描述，仅靠动态张力曲线或拟合的吸附常数是不够的，必须分别确定界面热力学、扩散和吸附动力学。本研究将平衡与扩散测量与微流控EDGE张力计相结合，该张力计可提供近乎静止的界面及可控的微米级传输。平衡性质与扩散被独立确定，吸附动力学成为关键未知量。随后，采用非平衡热力学描述计算动态张力，不假设吸附层与亚表面溶液间存在瞬时平衡。对于非离子表面活性剂C₁₀E₈，平衡热力学与传质被独立约束，单一本征吸附速率常数可描述多种浓度的情况。研究将该框架扩展至SDS，纳入静电相互作用与亚表面浓度动力学，成功捕捉瞬态耗尽与补充现象。一旦确定热力学、传质及动力学参数，模型即可预测超出确定参数所用几何结构与条件的动态界面张力。因此，微流控EDGE张力计既提供了可靠的短时间张力测量方法，又为识别界面表面活性剂传质的物理机制提供了定量框架。
英文摘要
At short times, interfacial tension depends on experimental geometry because surfactant transport to the interface depends on the mass-transfer conditions.A predictive description therefore requires more than a dynamic tension curve or a fitted adsorption constant: interfacial thermodynamics, diffusion, and adsorption kinetics must be identified separately. Here, we combine equilibrium and diffusion measurements with a microfluidic EDGE tensiometer that provides a nearly stationary interface and controlled micrometer-scale transport. Equilibrium properties and diffusion are determined independently, leaving adsorption kinetics as the key unknown. Dynamic tension is then calculated using a nonequilibrium thermodynamic description, without assuming instantaneous equilibrium between the adsorbed layer and the subsurface solution. For the nonionic surfactant C$_{10}$E$_{8}$, equilibrium thermodynamics and transport are independently constrained, and a single intrinsic adsorption rate constant describes several concentrations. We extend the framework to SDS by including electrostatic interactions and subsurface-concentration dynamics, capturing transient depletion and replenishment. Once thermodynamic, transport, and kinetic parameters are identified, the model predicts dynamic interfacial tension beyond the geometry and conditions used to determine them. The microfluidic EDGE tensiometer thus provides both a reliable short-time tensiometry method and a quantitative framework for identifying the physical mechanisms governing surfactant mass transfer at interfaces.
