Synthesis of paramagnetic polymers based on polyethyleneimine (PEI)

Abstract

Paramagnetic polymers based on PEI have been synthesized and characterized. Studies on the structure and property relationship showed that the magnetic property was affected by the molecular weight, ferric content and linear or branched structures of the resultant magnetic PEIs. Interestingly, the magnetic susceptibility had a linear relationship to the ferric content. The resultant polymers showed a magnetic response to an external magnetic field, and have great potential in magnetic separation, magnetic switching as well as controlled delivery.