title: Platelet adhesive resistance of segmented polyurethane film surface-grafted with vinyl benzyl sulfo monomer of ammonium zwitterions.
abstract: Platelet from human plasma adhered on the segmented poly(ether urethane) (SPEU) film grafted with N,N-dimethyl-N-(p-vinylbenyl)-N-(3-sulfopropyl) ammonium (DMVSA) was studied. SPEU films were hydroxylated by potassium peroxosulfate (KPS) and then grafted with DMVSA using ceric ammonium nitrate (CAN) as initiator. The mixing time of hydroxylated SPEU/CAN and the monomer concentration effect on graft polymerization yield were determined by ATR-FTIR. Surface analysis of the grafted films by ATR-FTIR and ESCA confirmed that DMVSA was successfully grafted onto the SPEU film surface. The grafted film possessed a relatively hydrophilic surface, as revealed by water contact angle measurement. The improved blood compatibility of the grafted films was preliminarily evaluated by a platelet-rich plasma adhesion study and scanning electron microscopy, using original SPEU and hydroxylated SPEU films as the controls. The results showed that platelet attachment was decreased greatly on the segmented polyurethane films grafted with DMVSA. This kind of new biomaterials grafted with sulfo ammonium zwitterionic monomers might have potential for biomedical applications.
authors.affiliation: Research Center of Surface and Interface Chemistry and Engineering Technology, Nanjing University, 210093, Nanjing, People's Republic of China. zhang-gun@yahoo.com
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.forename: Jiang
authors.initials: J
authors.lastname: Yuan
authors.forename: Youling
authors.initials: Y
authors.lastname: Yuan
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Zang
authors.forename: Jian
authors.initials: J
authors.lastname: Shen
authors.forename: Sicong
authors.initials: S
authors.lastname: Lin
mesh_terms: D001792:Blood Platelets / Q000378:metabolism; D006801:Humans; D006860:Hydrogen Bonding; D006900:Hydroxylation; D007477:Ions; D008956:Models, Chemical; D010949:Plasma / Q000378:metabolism; D010973:Platelet Adhesiveness; D011140:Polyurethanes / Q000737:chemistry*; D017680:Potassium Compounds / Q000737:chemistry; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D017550:Spectroscopy, Fourier Transform Infrared; D013431:Sulfates / Q000737:chemistry; D014753:Vinyl Compounds / Q000737:chemistry*
chemical_list: D007477:Ions; C484075:N,N-dimethyl-N-(p-vinylbenyl)-N-(3-sulfopropyl)ammonium; D011140:Polyurethanes; D017680:Potassium Compounds; D000644:Quaternary Ammonium Compounds; D013431:Sulfates; D014753:Vinyl Compounds; C115016:polyetherurethane; C009007:potassium persulfate