摘要
聚乳酸具有良好的生物相容性以及可降解性能,但其强疏水性能一定程度上限制了其在可降解支架领域的应用。本研究利用氩气(Ar)低温等离子技术在PDLLA血管支架表面接枝亲水性的聚合物聚乙烯吡咯烷酮(PVP)以及聚醋酸乙烯酯(PVAc)。接触角测试表明,经等离子接枝的材料表面接触角由原来的105°~110°可降至22°,由强疏水性变为亲水性。体外细胞粘附性实验表明:等离子处理后的材料表面表现出亲水性质,其细胞的粘附性也得以明显提高,更加有利于细胞在其表面的生长。
Polylactic acid has good biological compatibility and biodegradable properties, but to some extent, its strong hydrophobicity limits its development in the field of biodegradable stents. In this work, Ar low temperature plasma technology was applied to graft hydrophilic polymer polyvinylpyrrolidone （PVP） and polyvinyl acetate （PVAc） on the surface of PDLLA stent. Contact angle test showed that surface contact angle of the plasma grafted stent can fall from 105°--110° to 22°, implying a change from strong hydrophobicity to hydrophilicity. In vitro cell adhesion experiments showed that, after plasma treatment, the surface of the material is hydrophilic and the cell adhesion were significantly improved, facilitating the cellgrowth.
出处
《青岛科技大学学报（自然科学版）》
CAS
2017年第2期54-58,共5页
Journal of Qingdao University of Science and Technology:Natural Science Edition
基金
国家自然科学基金资助项目(50390090)
关键词
聚乳酸血管支架
低温等离子接枝
聚乙烯吡咯烷酮
聚醋酸乙烯酯
亲水性
细胞粘附性
PDLLA vascular stent
low-temperature plasma grafting
polyvinylpyrrolidone （PVP）
polyvinyl acetate （PVAc）
hydrophilic
cell adhesion
