State of the Art of Polysulfone Microcapsules

The applications of polysulfone (PSf) microcapsules have been increasing in the last years. The main reason for using PSf as a capsule shell is due to the high chemical and physical stability that this material possesses. In addition, it is a well-known polymer, broadly used by industries and moreover, it is a non-toxic and biocompatible functional material that may be employed for medical and biological applications. Polysulfone microcapsules preparation may be carried out easily by phase inversion precipitation technique that is a well-established technique in which capsule formation takes place in few seconds. Phase inversion precipitation allows obtaining different polymer shapes, it does not produce toxic products and it does not require high temperatures. The present review collects and describes several investigations focused on the use of PSf as polymer system for microencapsulation and its applications.