聚氨酯表面性能对其生物相容性的影响

特殊的微相分离结构,赋予聚氨酯弹性体良好的稳定性、优异的力学性能以及较好的生物相容性,已被广泛应用于生物医学领域.但其生物相容性仍不够理想.由于材料的生物相容性与材料表面的性质密切相关,对材料表面进行改性成为改善相容性的重要方法和途径,其研究受到广泛关注.对聚氨酯进行改性的诸多方法中,在材料表面进行化学接枝生物活性物质以提高生物相容性的方法是目前研究的热点.本文在对聚氨酯进行改性以提高其生物相容性的各种方法和途径进行评述的基础上,对聚氨酯表面结构性能与生物相容性的关系进行讨论,并重点对该研究领域的最新进展进行总结.

Effect of Surface Properties on the Biocompatibility of Polyurethane

Polyurethane(PU) has been widely used biomedical material with good stability,excellent mechanical properties and reasonable biocompatibility due to its specific micro-phase separation structure.However,its unsatisfactory blood compatibility results in limitation of application in the biomaterial fields.As far as the dependence of biocompatibility on surface properties of materials is concerned,surface modification has been recognized a preferable way to improve the biocompatibility for biomaterials.In view of many methods applied to modify the surface of polyurethane,the bioactive molecules modified surface through chemical modification has attracted a great of interest.In the present article the approaches of modification to improve the biocompatibility of polyurethane were briefly summarized,and the relationship between polyurethane surface properties and biocompatibility was also discussed.