超临界二氧化碳(scCO2)作为一种新型“绿色溶剂”,具有无毒、不可燃、易于分离以及来源丰富等特点,有望替代传统的挥发性有机溶剂。但scCO2是很弱的溶剂,大部分极性分子和高分子量聚合物在其中的溶解度都很低,限制了其工业应用。目前,应用scCO2的一个挑战就是寻找有效的适用于scCO2的表面活性剂、配合物和相转移剂等。本文综述了亲二氧化碳聚合物的研究进展,从链段柔顺性和自由体积、溶质/溶质相互作用、溶质/CO2相互作用三个方面介绍了亲二氧化碳碳氢化合物的设计原则,并介绍了亲二氧化碳聚合物在制备表面活性剂、增溶染料和催化剂等方面的相关应用。
Supercritical carbon dioxide (scCO2) is considered to be a new "green solvent", because it is nontoxic, nonflammable, easy separation and readily available in high purity from a number of sources. ScCO2 has been shown to be a promising alternative solvent for conventional volatile organic solvents. A significant technical barrier with using scCO2 is that it is a relatively weak solvent of important classes of materials which tend to exhibit low solubility in scCO2 including polar molecules and high-molecular weight polymers, which limits its industrial applications. Currently, in order to expand its applications, the discovery of inexpensive CO2-soluble materials or "CO2-philes" has been an important challenge. There has been considerable research effort focused on discovering inexpensive CO2-philic polymers from whieh inexpensive CO2-philic surfactants, ligands, and phase transfer agents could be developed. The present paper reviews the recent progress of CO2-philie polymers and their design principles based on the molecular characteristics (flexibility and free volume, weak self-interactions of solutes and powerful interactions between CO2 and solutes). And the applications of CO2-philic polymers such as surfactant preparation, solubilisation of catalysts and dyes will also be discussed.