CAJ | 학술논문

利用飞秒激光在316L不锈钢表面诱导制备血液相容性微结构，并从微结构的润湿性角度分析血液相容性改善的机理。随着激光能量密度的增加，在样品表面分别制备了单一的亚微米级典型激光诱导周期性波纹(LIPSS)，以及两种双尺度结构，即覆盖了LIPSS的微米级波纹结构和锥状钉结构。硅烷化后的微结构样品表观接触角都超过150°，达到了超疏水性能要求，并且随着所采用激光能量密度的增强而增大，尤其是锥状钉双尺度结构的接触角达到了163.8°。采用了3种常规评价方法对微结构表面的血液相容性进行了评价，结果表明微结构表面的血液相容性显著优于光滑表面，且随着表面的表观接触角的增大而改善。
이용비초격광재316L불수강표면유도제비혈액상용성미결구，병종미결구적윤습성각도분석혈액상용성개선적궤리。수착격광능량밀도적증가，재양품표면분별제비료단일적아미미급전형격광유도주기성파문(LIPSS)，이급량충쌍척도결구，즉복개료LIPSS적미미급파문결구화추상정결구。규완화후적미결구양품표관접촉각도초과150°，체도료초소수성능요구，병차수착소채용격광능량밀도적증강이증대，우기시추상정쌍척도결구적접촉각체도료163.8°。채용료3충상규평개방법대미결구표면적혈액상용성진행료평개，결과표명미결구표면적혈액상용성현저우우광활표면，차수착표면적표관접촉각적증대이개선。
Microstructures with a good blood compatibility on the surface of stainless steel were prepared by using a femtosecond laser.The mechanism of the blood compatibility improvement was analyzed from the wet-tability of the microstructure perspective.With laser fluence increasing,we fabricated single typical laser-in-duced periodic surface structures (LIPSS)on the submicron scale and double-scale structure:periodic ripples and periodic cone-shaped spikes on the micron scale,both covered with LIPSS.After silanized,the apparent contact angles of these microstructures become larger than 150°,which meets the superhydrophobic perform-ance requirements.With the laser fluence increasing,the apparent contact angles increase,and especially the contact angle of the cone-shaped double-scale structure reaches as high as 163.8°.The blood compatibility of the microstructures was evaluated with 3 conventional evaluation methods.The results show that the blood com-patibility of the microstructures was significantly better than that of the polished surface,and that with the con-tact angles of the surface increasing,the blood compatibility can be further improved.