HAN, DK JEONG, SY AHN, KD KIM, YH MIN, BG 2024-01-21T23:02:28Z 2024-01-21T23:02:28Z 2022-01-10 1993-01 0920-5063 https://pubs.kist.re.kr/handle/201004/146320 In order to improve the thromboresistance of the commercial polyurethane(PU), its surface modification was accomplished by three new different Methods and their surface characteristics were investigated using ATR-FTIR, ESCA, SEM, and dynamic contact angle measurements. Sulfonations using propane sultone were performed directly onto PU or onto hydrophobic dodecanediol (DDO) grafted PU or onto hydrophilic poly(ethyleneoxide) (PEO) grafted PU. ESCA data coincided well with ATR-IR results, as more 0 at. % for PEO grafted PUs and the presence of S for the sulfonated PUs were revealed. At SEM observation the surfaces of PU-DDO and PU-PEO were relatively smooth, whereas all the sulfonated PU surfaces showed excellent smoothness and homogeneity. The hydrophilicity of the surfaces was considerably increased after PEO grafting or sulfonation. In addition, all the sulfonated PU surfaces, particularly PU-PEO-SO3, which has further hydrophilicity, exhibited complete wetting behavior due to the negatively charged SO3 groups. English VSP BV HEPARIN-IMMOBILIZED POLYURETHANES CHAINS PREPARATION AND SURFACE-PROPERTIES OF PEO-SULFONATE GRAFTED POLYURETHANES FOR ENHANCED BLOOD COMPATIBILITY Article 1 JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION, v.4, no.6, pp.579 - 589 JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 4 6 579 589 scie scopus A1993MA27700002 2-s2.0-0027751092 Engineering, Biomedical Materials Science, Biomaterials Polymer Science Engineering Materials Science Polymer Science Article HEPARIN-IMMOBILIZED POLYURETHANES CHAINS POLYURETHANES SURFACE MODIFICATION POLYETHYLENEOXIDE SULFONATION SURFACE CHARACTERISTICS SURFACE SMOOTHNESS HYDROPHILIZATION