Han D K, Jeong S Y, Ahn K D, Kim Y H, Min B G
Polymer Chemistry Laboratory, Korea Institute of Science and Technology, Cheongryang, Seoul.
J Biomater Sci Polym Ed. 1993;4(6):579-89. doi: 10.1163/156856293x00221.
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.
为了提高商用聚氨酯（PU）的抗血栓性，通过三种不同的新方法对其表面进行了改性，并使用衰减全反射傅里叶变换红外光谱（ATR-FTIR）、光电子能谱（ESCA）、扫描电子显微镜（SEM）和动态接触角测量等手段对其表面特性进行了研究。使用丙烷磺酸内酯进行的磺化反应直接在PU上进行，或者在接枝了疏水性十二烷二醇（DDO）的PU上进行，或者在接枝了亲水性聚环氧乙烷（PEO）的PU上进行。ESCA数据与ATR-IR结果吻合良好，这表明接枝了PEO的PU中氧原子的原子百分比更高，且磺化后的PU中存在硫元素。在SEM观察中，PU-DDO和PU-PEO的表面相对光滑，而所有磺化后的PU表面都表现出优异的光滑度和均匀性。在接枝PEO或进行磺化后，表面的亲水性显著增加。此外，所有磺化后的PU表面，特别是具有更高亲水性的PU-PEO-SO3，由于带负电荷的SO3基团而表现出完全的润湿行为。
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