Method and device for assisting PDMS surface crack growth by laser stress

The invention belongs to the field of laser surface modification, and discloses a method and a device for assisting PDMS surface crack growth by laser stress. According to the method, the laser is directly radiated on the surface of the PDMS, the surface of the PDMS is modified or surface microcracks are formed through stress control and control of various parameters (laser energy, pulse repetition frequency, focal plane and the like) of the laser, so that the biological adhesiveness of the surface of the PDMS can be improved to different degrees, moreover, by controlling the stress direction of a working platform, the crack growth direction can be controlled in a local area with a complicated surface, the patterning is finer, and compared with the prior art, the machining quality is improved, and the machining efficiency is higher. 本发明属于激光表面改性领域，公开了一种激光应力辅助PDMS表面裂纹生长的方法及装置。本发明利用激光直接辐射在PDMS表面，通过应力控制和激光的各参数(激光能量、脉冲重复频率以及焦平面等)控制使其表面改性或形成表面微裂纹，可以不同程度提升PDMS表面生物附着性；并且，通过工作平台的应力方向控制，可以在表面复杂的局部区域进行裂纹生长方向的控制，使图案化更细致；