PDMS真空紫外光表面亲水改性研究

Research on hydrophilizition of polydimethylsiloxane(PDMS) surface by vacuum ultroviolet radiation

PDMS用作人体植入材料和医疗制品已获得广泛应用,但疏水性表面会降低其生物相容性并引起并发症,而亲水改性后的表面,亲水性也会逐渐变差.采用172 nm真空紫外光对PDMS进行表面亲水改性处理后,亲水性在较长时间内得以保持.用红外光谱、X射线光电子能谱和水接触角测试对改性前后材料表面化学组成和亲水性变化进行检测,结果表明:真空紫外光照后,PDMS表面由疏水性转变为亲水性,且表面形成的类玻璃物质大大延缓了其疏水性的恢复.

PDMS has been widely used as embedded and medical materials,but the hydrophibic surface,which could turn back to hydrophobic one even after the hydrophilic modification,could reduce the biocompatibility and cause complication in the body.In this paper,hydrophilic surface was fabricated on PDMS using 172 nm vacuum ultraviolet（VUV） light.The results tested by Fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy and water contact angle test apparatus were shown that the irradiated surface became hydrophilic after the irradiation.The glass-like substance,which formed on the irradiated area,slowed the hydrophobic recovery greatly.