Magnetically activated chemical equilibrium and separations using recyclable magnetic surfactants and polymers

建议编号：1605894 PI：Scovazzo，P.标题：磁激活化学平衡和使用可回收磁性表面活性剂和聚合物的分离该项目将开发低能量磁驱动方法，以满足化学和生物分离日益增长的能源需求。分离方法将使用可回收的磁性化学表面活性剂来驱动磁增强吸附和液-液相萃取。该项目的技术被设想为一种磁控摆动操作，类似于温度和压力摆动吸附系统。为了完成分离体系的研究，该项目将需要合成新型的小分子和大分子磁性表面活性剂，并对磁辅助吸附和液/液分配进行基础探索。该项目将产生用于低能量分离的磁场操纵的关键数据，并提供传统分离技术的绿色替代方案。该项目将为研究生和本科生提供基于项目的学习体验。此外，该项目还将设计和实施一个面向K-12推广的迷你课程，通过实践战略思维、工程问题解决和工程经济来加强STEM教育。与之前研究的由纳米到微米大小的永磁体悬浮液组成的顺磁材料不同，该项目的顺磁材料是分子尺度上的磁性分子。该项目将需要合成三种新的磁性响应性物种：带有磁性反离子的离子表面活性剂；氧化还原响应性磁性表面活性剂；以及具有多个磁性部分的嵌段共聚两亲化合物。随后，将表征表面活性剂的性质(例如，临界胶束浓度、接触角和表面张力)对磁场的响应。使用设计的表面活性剂，研究小组将开发磁辅助吸附和磁控液/液分配过程。将对三个磁响应类别中的每一个进行评估，以进行模型有机化合物(如苯、苯酚和布洛芬)的化学分离，包括热力学(增溶)和传输现象(通过打开/关闭磁场来捕获/释放胶束)的可控变化。开发的磁力驱动分离过程将对照当前的分离技术和能源效率进行评估。

Proposal Number: 1605894 PI: Scovazzo, P.Title: Magnetically activated chemical equilibrium and separations using recyclable magnetic surfactants and polymersThis project will develop low energy magnetically driven methods to address the growing energy demands for chemical and biological separations. The separation methods will use recyclable magnetic chemical surfactants to drive magnetically enhanced adsorption and liquid-liquid phase extractions. The project's technology is envisioned as a magnetic controlled swing operation akin to temperature and pressure swing adsorption systems. In order to complete the research of the separation systems, the project will require the synthesis of novel small-molecule and macromolecular magnetic surfactants, along with the fundamental exploration of magnetically-aided adsorption and liquid/liquid partitioning. The project will generate key data for the manipulation of magnetic fields for low energy separations and provide a green alternative to traditional separation techniques. The project will provide project-based learning experiences graduate and undergraduate students. Additionally, the project will design and implement a mini-course for K-12 outreach to enhance STEM education through hands-on strategic thinking, engineering problem solving, and engineering economics.Unlike the previously studied paramagnetic materials comprised of suspensions of nanometer- to micrometer-sized permanent magnets, this project's paramagnetic materials are magnetic molecules where the "magnets" are on the molecular scale. The project will require the synthesis of three types of novel magnetically responsive species: ionic surfactants with magnetic counter ions; redox-responsive magnetic surfactants; and block copolymer amphiphiles with multiple magnetic moieties. Subsequently, the surfactant properties (e.g., critical micelle concentrations, contact angles, and surface tensions) will be characterized in response to a magnetic field. Using the designed surfactants, the research team will develop magnetically-aided adsorption and magnetically-controlled liquid/liquid partitioning processes. Each of the three magnetically responsive classes will be evaluated for chemical separations of model organic compounds such as benzene, phenol and ibuprofen, including controllable changes in thermodynamics (solubilization) and transport phenomena (micelle capture/release by turning a magnetic field on/off). The developed magnetically driven separation processes will be evaluated against current technologies for separation and energy efficiency.