Synthesis and Characterization of Polyurethane with Pendant Fluorinated Bis-Ammonium Salts Attached on the Hard Segment

Polyurethanes with pedant quaternary ammonium salts (QAS) have been shown potent antimicrobial properties against gram-positive bacteria but less sensitive to gram-negative ones. Besides, due to using a large amount of QAS chain extenders, Polyurethanes with pedant QAS have been proven to be high water adsorption and even water soluble. In order to solve the two problems mentioned above, Novel polyurethanes with Fluorinated Bis-ammonium Salts attached on the hard segment was synthesized and characterized by GPC and ¹HNMR. In order to study the surface and anti-bacterial properties of the novel materials, the degree of bulk microphase separation of synthesized polyurethanes was firstly characterized by FTIR and DSC in this study. It was found that the degree of microphase separation decrease with the increasing amounts of Fluorinated Bis-ammonium Salts chain extender (EDF).