改善聚醚醚酮表面润湿性的研究

Study on Improving the Surface Wettability of Poly(ether-ether-ketone)

采用飞秒激光微纳加工和磁控溅射技术在聚醚醚酮表面制备了一个亲水钽表面,研究了飞秒激光处理和钽膜对聚醚醚酮表面形貌及润湿性的影响。结果表明,飞秒激光处理使聚醚醚酮光滑的表面形貌转变为粗糙的多孔结构表面,而且沉积的钽膜未掩盖表面的微纳结构。此外,飞秒激光处理使聚醚醚酮表面接触角降低,垂直于凹槽观测的接触角由82.8°降低到43°,平行于于凹槽观测的接触角由96.5°降低到69°。进一步在表面沉积钽膜后,垂直于凹槽观测的接触角由69°降低到11.2°。然而,只沉积钽膜的表面,垂直于凹槽观测的接触角由96.5°降低到54.4°。由此表明,表面的微纳结构和钽膜协同改善了聚醚醚酮表面润湿性。该方法解决了聚醚醚酮表面疏水性问题,在植入体表面改性中具有重要应用价值。

A hydrophilic tantalum surface is fabricated on poly(ether-ether-ketone) surface by femtosecond laser micro-nano machining and magnetron sputtering technology, and the effect of femtosecond laser treatment and tantalum film on the surface morphology and wettability of poly(ether-ether-ketone) are studied. The results show that femtosecond laser treatment transforms the smooth surface of poly(ether-ether-ketone) into a rough porous surface, and the deposited tantalum film does not cover the micro-nanostructure of the surface. In addition, the femtosecond laser treatment reduces the surface contact angle of poly(ether-ether-ketone), the contact angle observed perpendicular to the groove decreases from 82.8° to 43°, and the contact angle observed parallel to the groove decreases from 96.5° to 69°. After further depositing the tantalum film on the surface, the contact angle observed perpendicular to the groove decreases from 69° to 11.2°. However, by depositing only the surface of the tantalum film, the contact angle observed perpendicular to the groove decreases from 96.5° to 54.4°. It shows that the micro-nanostructure of the surface and the tantalum film synergistically improve the surface wettability of poly(ether-ether-ketone). This method solves the problem of surface hydrophobicity of poly(ether-ether-ketone) and has significance in the surface modification of implants.