基于离子液体反应性的“点击”催化剂设计及环氧可控聚合

Ionic liquids, as a new type of green medium, provide new opportunities for the efficient transformation of resources. Using the reactivity of ionic liquid to design catalytic system to promote the reaction is the new direction and development trend of its industrial application. In the present project, the synthesis of polyether polyol, which is the most important epoxy downstream products, through the epoxy compounds polymerization is selected as the representative reaction process. In order to solve the problems of the present catalysts existed such as broad molecular weight distribution of polyether products, pollution and recycling, poor stability, we will explore the nature of the reactivity of ionic liquids and epoxy compounds, and clarify the relationship between the structure of ionic liquids and their reactivity. A innovative strategy for the design and synthesis of a new type of polyionic liquid "click" catalyst for the synthesis of a reactive ionic liquid - epoxy compound, a novel catalytic active center monomer, is proposed. Combined with the experimental and simulation calculation, disclose the influence of the chemical properties, nano micro structure of "click" polymeric ionic liquid catalyst on its catalytic performance, establish the coupling mechanism of polymerization degree and molecular weight of polyether and polymeric ionic liquid, to realize the precise regulation of epoxy controllable polymerization of polyether polyol molecular weight. So as to provide new ideas and scientific basis for epoxy downstream high value chemicals synthesis.

离子液体作为一种新型的绿色介质为资源的高效转化提供了新机遇，利用离子液体反应性设计催化体系促进反应进行是推进离子液体工业化应用的新方向和发展趋势。本项目以环氧化合物重要的下游产物聚醚多元醇合成为典型反应过程，针对现有催化剂存在的聚醚分子量分布宽、催化剂污染、回收难、稳定性差等问题，从分子层次阐明离子液体与环氧化合物反应性的本质，明确离子液体结构与其反应性之间的关系，提出设计合成含有反应性离子液体-环氧化合物的新型催化活性中心单体的聚离子液体“点击”催化剂的新策略。结合实验和模拟计算，揭示聚离子液体催化剂的物化性质、纳微结构与离子液体阴阳离子结构及其催化性能之间的影响规律，阐明离子液体催化环氧聚合的反应机理；建立功能化多相聚离子液体聚合度与聚醚分子量的耦合机制，实现反应原子经济性可控分子拼接，从而精准调控聚醚分子量分布，为环氧下游高值含氧化学品的合成提供新思路和科学依据。

离子液体作为一种新型的绿色介质为资源的高效转化提供了新机遇，设计离子液体催化体系是推进离子液体工业化应用的新方向和发展趋势。本项目以环氧化合物重要的下游产物醇醚合成为典型反应过程，针对现有催化剂存在的聚催化剂污染、回收难、稳定性差等问题，从分子层次阐明离子液体与环氧化合物反应性的本质，明确离子液体结构与其性能之间的关系，提出设计新型离子液体催化剂的新策略。结合实验和模拟计算，揭示离子液体催化剂的物化性质、纳微结构与离子液体阴阳离子结构及其催化性能之间的影响规律，阐明离子液体催化环氧开环的反应机理；建立功能化多相聚离子液体聚合度催化制备醇醚新工艺，实现反应原子经济性可控分子拼接，为环氧下游高值含氧化学品的合成提供新思路和科学依据。