Modeling of copolymer solubility in supercritical CO2 for the development of environmental-friendly cleaning processes

CO2是一种环境友好的溶剂，可用作传统溶剂（水性或有机溶剂）的替代品。然而，使用超临界CO2的新清洁工艺的设计可能需要添加表面活性剂。这些添加剂的目的是增加CO2的溶剂力，CO2是非极性分子，因此对于工业设施中通常遇到的任何极性污染物（例如金属、金属氧化物或有机金属化合物）而言是不良溶剂。本工作中研究的表面活性剂是氟化硅氧烷聚合物和烃化共聚物。虽然氟化分子与超临界CO2具有更好的相容性，但纯烃化分子与现有的最终废物处理设施具有完美的相容性。最终的目标是建立一个可靠的方法，在表面活性剂的性能和CCb的效率方面的工艺设计。该项目将与法国的两个研究小组合作进行。第一组将在超临界CO2中进行表面活性剂溶解度的实验测量。这些数据将在多特蒙德进行建模。第二组将使用前两组的结果来开发工业清洗工艺。

CO2 is an environment-friendly solvent that can be used as a substitute for classical solvents (aqueous or organic). However, the design of a new cleaning process using supercritical CO2 may require the addition of surfactants. The aim of these additives is to increase the solvent power of CO2 which is a non-polar molecule and thus a poor solvent for any polar contamination that is generally encountered in industrial facilities, such as metals, metal oxides or organo-metallic compounds. Surfactants studied in this work are fluorinated siloxane polymers and hydrocarbonated copolymers. Whereas fluorinated molecules exhibit a better compatibility with supercritical CO2, purely hydrocarbonated molecules show a perfect compatibility with existing ultimate waste-treatment facilities. The final goal is to establish a reliable methodology for the process design in terms of surfactants properties and CCb-efficiency. The project will be carried out in cooperation with two research groups from France. The first group will perform experimental solubility measurements of surfactants in supercritical CO2 - These data will be modeled in Dortmund. The second group will use the results of the first two groups for the development of an industrial cleaning process.