新型功能化离子液微乳液的形成、性质以及应用探索研究

Building novel self-assemblied microemulsion with special functions is one of the aims in the field of colloid and interface chemistry. Ionic liquids have been attracting much attention as a class of new media because of their special physicochemical properties. Therefore，it is of great significance to prepare a microemulsion with functionalized ionic liquids invloved theoretically and practically.In this proposal, we will use a series of ionic liquids with lower critical solution temperature（LCST）to replace traditional organic solvents to prepare functionalized ionic liquid microemulsions, which is based on the fact that temperature can reversibly drive the phase separation between LCST type ionic liquid and water, as such microemulsion can be switched by temperature. We will focus on studying the formation and mechanism of such thermo-stimuli microemulsions and investigating the microstructure and properties by various technologies. Moreover,the effect of temperature, ionic liquid and surfactant type on the microemulsion properties will also be studied. It is also proposed to study the transition process of microemulsion by temperature stimuli. It is expected that such microemulsions may be applied in extraction and separation process. The proposed project will benefit the overlap between colloid and interface chemistry and green chemistry and widen the potential application of both ionic liquids and microemulsions.

构建具有特殊功能的微乳液聚集体是胶体与界面化学界追求的目标之一。离子液体是一类具有诸多优异物理化学性质及功能的新型介质。利用功能化离子液体来制备新型的微乳液体系具有重要的理论意义和实际应用价值。本项目将利用低临界溶液温度（LCST）的温敏性离子液体来构建功能化离子液微乳液体系。根据温度调控LCST型离子液体与水之间单相/两相变化的原理，实现温度诱导的开关型离子液微乳液在微乳液/胶束或微乳液/真溶液之间的转变。探索这种对温度刺激具有响应性的智能型微乳液的形成规律和机理。通过相行为观察、光谱、电化学测定等手段研究微乳液的微观结构和性质以及这些性质与温度、离子液体和表面活性剂结构等因素的关系，揭示这类功能化微乳液的可逆转变规律，并进一步探索这类聚集体在萃取分离领域的应用。开展该课题有利于促进胶体与界面科学、绿色化学领域相互交叉渗透，并拓宽离子液体以及微乳液的应用范围。

构建具有特殊功能的微乳液聚集体是胶体与界面化学界追求的目标之一。离子液体是一类具有诸多优异物理化学性质及功能的新型介质。利用功能化离子液体来制备新型的微乳液体系具有重要的理论意义和实际应用价值。本项目将利用低临界溶液温度（LCST）的温敏性离子液体成功地构建了功能化离子液微乳液体系。通过深入系统地筛选各种离子液体以及表面活性剂，明确了形成离子液微乳液的条件，从而建立了制备新型功能化离子液微乳液的新方法。我们揭示了非离子表面活性剂的亲水基团与离子液体之间的静电相互作用是驱动微乳液形成的驱动力这一机理。基于此机理，成功地解释了离子液体参与的两亲自组装体系具有良好的热稳定性的特点。.此外，根据温度调控LCST型离子液体与水之间单相/两相变化的原理，我们首次实现温度诱导的开关型离子液微乳液在微乳液/胶束或微乳液/真溶液之间的转变。探索了这种对温度刺激具有响应性的智能型微乳液的形成规律和机理，揭示了其本质-亲水小分子在水中的微观异相行为。通过相行为观察、光谱、电化学测定等手段研究微乳液的微观结构和性质以及这些性质与温度、离子液体和表面活性剂结构等因素的关系，揭示这类功能化微乳液的可逆转变规律，并进一步探索这类聚集体在萃取分离领域的应用。开展该课题促进胶体与界面科学、绿色化学领域相互交叉渗透，拓宽离子液体以及微乳液的在材料制备、萃取等领域应用范围。