疏水性聚丙烯酸酯人工晶状体的低温等离子体改性

通过低温等离子体表面改性技术对疏水性聚丙烯酸酯人工晶状体进行表面改性, 并对改性前后材料的表面结构、形貌和光学性能进行了表征. 静态水接触角结果显示, 经过氨等离子体处理后的人工晶状体亲水性效果最好, 同时最佳的改性时间为120 s, 改性功率为150 W. XPS分析结果进一步证实, 经等离子体处理后, 在人工晶状体表面引入了极性基团. 原子显微镜观察结果显示, 改性后材料表面更加凹凸不平, 粗糙度显著增加而透光率变化很小, 但过大功率改性的样品透光率明显下降. 时效性测试结果表明, 人工晶状体在改性14 d后疏水性恢复趋于稳定.

Surface Modification of Hydrophobic Acrylic Intraocular Lens by Ammonia Low-temperature Plasma

Hydrophobic acrylic intraocular lens is a novel soft material, which is different from the traditional polymethyl methacrylate(PMMA) lens. Surface modification of the lens surface with ammonia low-temperature plasma treatment was performed and characterized in order to enhance the hydrophilicity and biocompatibility. The results show that NH₃ plasma treatment produce the most hydrophilic surface among O₂, Ar and NH₃ gases. The optimal modification time and power were 120 s and 150 W, respectively. XPS analyses further verified that the polar groups were immobilized on the lens surfaces. The AFM images of the treated samples show rougher surfaces with a significant increase in root mean square roughness(RMS). Transmittance exhibited small changes after modification in general. However, a larger power led to a sharp drop in the transmittance. According to the aging effect test, hydrophobic recovery occurred following the modification and tended to be stable after 14 d.