Abstract:

In irder to improve the cytocomtatibility of polyester (PET) materials, polypyrrole (PPY) with good biocompatibility was coated on PET fabric.  in situ polymerization using different solvents was used to prepared polypyrrole coating with different surface performances. The performance of dynamic blood clotting test was carried out to characterize anticoagulant properties of composited materials. The reaults show that defferent surface morphologies and K/S values can be acquired using different solvents and different ratiosfor the mixed solvents. The K/S value is smallest in the water as the solvent. For ACN/water solvent, with the increase of ACN/water ratio, the K/S value increases and the surface of PPy/PET is smoother when ACN/water ratio is smaller. BCI is the best when CTAB/Py is 1：2, improvwes about 140% at 5 min compared to the uncoated PET fabrics. Anticoagrlant peoperties are related to micromorphology and surface properties of PPy. 

Key words: anticoagulant property, polyester, polypyrrole, in-situ polymerization