New-Type Sulphonated Polymer Surfaces for Improving Blood Compatibility

摘要

A new-type sulphonated polymer surface obtained by the solution tech-nique is reported.The surface properties of the modified polymer surfaces are charac-terized by SEM and ESCA,and their in vitro blood compatibility is evaluated in terms of TT,PRT,PTT,and platelet adhesion.The modified polymer surface is found to be the least thrombogenic when the modifying polymer molecule contains hydrophilic PEO chains.The PEO chains can serve as"spacers"inserted into the film surface and SO_3~(-) group.This kind of polymer surface is easily mobile for reconstructing to carry out the function of the SO_3~(-) group and PEO chains.