双连续颗粒稳定乳液中的基底导向润湿层
Substrate-Directed Wetting Layers in Bicontinuous Particle-Stabilised Emulsions
AI总结：
本研究通过实验结合数值模拟，揭示了STrIPS法制备的负载型bijel薄膜中，基底润湿性和纳米颗粒含量对界面润湿层结构的调控规律，为其功能化应用提供了关键依据。
AI中文摘要：
双连续界面堵塞乳液凝胶（bijel）由于其颗粒稳定的液体通道交织结构，可实现跨多个长度尺度的高效传质。这种独特形态在分离和催化领域具有巨大应用潜力，尤其是通过溶剂转移诱导相分离（STrIPS）制备的bijel。STrIPS可在固体基底上连续大规模生产纳米结构bijel薄膜，但基底性质对其形成动力学和最终形态的影响仍未被充分理解。本研究通过在润湿性可控的硅烷功能化玻璃基底上制备STrIPS bijel薄膜，并使用共聚焦显微镜分析所得结构，阐明了上述关系。结果显示，bijel-基底界面存在显著的润湿层，其厚度可通过纳米颗粒重量分数调控。与数值模拟一致，增加基底疏水性会使层流状富水表面层向斑片状、逐渐富油的结构转变。这些发现为负载型bijel薄膜中基底的结构导向作用提供了关键见解，有助于其作为功能材料的应用。
英文摘要：
Bicontinuous interfacially jammed emulsion gels (bijels) facilitate efficient mass transport across multiple length scales due to their interwoven structure of particle-stabilised liquid channels. This unique morphology imparts considerable potential for applications in separation and catalysis, particularly when fabricated \textit{via} solvent-transfer-induced phase separation (STrIPS). STrIPS enables the continuous, large-scale production of nanostructured bijel films on solid substrates, yet the influence of the substrate properties on the formation dynamics and final morphology remains insufficiently understood. In this study, this relationship is elucidated by preparing STrIPS bijel films on silane-functionalised glass substrates with selectively controlled wettability and analysing the resulting structure with confocal microscopy. The results showed the presence of notable wetting layers at the bijel-substrate interface, whose thicknesses could be tuned through the nanoparticle weight fraction. In line with numerical simulations, increasing the substrate hydrophobicity drove a transition from a laminar, water-rich surface layer to a patch-like, progressively oil-rich structure. These findings provide crucial insight into the structure-directing role of substrates in supported bijel films, which aids their application as functional materials.
