Mixed surfactants under extreme conditions

Previous experiments have shown effects of mixing ionic and non-ionic surfactants over a range of Ts at ambient conditions (RB2210186). The aim of this experiment is to study these systems under extreme Ts/Ps, to model in-engine conditions, using a specialised T/P cell loaned from ILL (pre-agreed between ISIS and ILL instrument scientists). This would explore novel concepts in colloids science. Using this specialised sample environment it will be uniquely possible to achieve “iso-density” solvents (see Figure 1) which would enable us to access new solvent landscapes.

此前已有实验在环境条件下，于一系列温度（Ts）范围内研究了离子型表面活性剂 (ionic surfactants) 与非离子型表面活性剂 (non-ionic surfactants) 复配的效应（RB2210186）。本实验旨在借助由ISIS与劳厄-朗之万研究所 (Institut Laue-Langevin，ILL) 仪器科学家预先商定借用的专用温压池 (specialised T/P cell)，在极端Ts/Ps条件下对上述体系开展研究，以模拟发动机内的实际工况，此举将探索胶体科学 (colloids science) 领域的全新研究理念。依托该专用样品环境，本实验将首次实现等密度溶剂 (iso-density solvents) 的制备（见图1），借此得以开拓全新的溶剂参数空间 (solvent landscapes)。