中文摘要：

采用溶液浇铸法和熔融法制备丙酰氧丙基纤维素/聚碳酸酯聚氨酯（PPC/PCU）液晶复合膜。通过SEM、AFM、表面能量参数测定、溶血和动态凝血试验,研究了复合膜的表面形貌特征和血液相容性,考察了复合膜的制备方法和液晶含量对其性能的影响。结果表明,复合膜表面呈现微相分离结构,PPC液晶能明显改善PCU材料的血液相容性,改善的程度与复合膜中液晶的含量相关。由不同方法制备的复合膜,其表面的形态结构和表面能量参数不一样,采用溶液浇铸法制备的复合膜,其接触玻璃板的表面可见明显的海岛状微相分离结构,复合膜的血液相容性最好。

英文摘要：

The propoxypropyl cellulose/polycarbonate urethane （PPC/PCU） liquid crystal composite membranes were prepared by solution casting and melting methods. By means of SEM, AFM, contact angle measurement, hemolysis and dynamic blood clotting test, the surface morphology, hydrophilicity and blood compatibility of the composite membranes were studied. The effects of preparation technology and content of liquid crystal on the properties of the composite membranes were also discussed. Results indicated that micro-phase separation structure was formed on the composite membrane surface, PPC liquid crystal obviously improved the blood compatibility of PCU material, and the degree of improvement were related with the content of PPC liquid crystal. Different preparation methods can control the membrane surface morphology and surface energy parameter. In the case of the solution casting method was used, the membrane surface that contact to the glass presented an evident island-sea micro-phase separation structure, and the blood compatibility was better than that of the others.