溶剂散逸自组装制备高分子有序微透镜阵列

Fabrication of Regular Polyvinyl Alcohol Microlens Arrays by Solvent Evaporation Self-organization

利用水珠为模板制备了聚苯乙烯有序多孔膜。在溶剂挥发的制冷作用下,水珠能够在冷的高分子溶液表面凝结形成有序的阵列,溶剂蒸发完毕后,高分子材料按照水珠排列形貌空隙形成有序多孔膜,一种两性共聚物被加入到溶液中稳定水珠而获得有序的多孔结构。将聚乙烯醇水溶液填充入多孔膜中,蒸干后用氯仿洗去聚苯乙烯,得到聚乙烯醇的整球微透镜阵列。聚苯乙烯有序针垫阵列是由有序多孔膜撕掉上层制备的,这种针垫结构内部具有半球结构的空间,并以此为模板制备了聚乙烯醇半球微透镜阵列。2种微透镜阵列均具有微观显影功能。通过2种微透镜的显像对比证实,半球微透镜阵列比整球微透镜阵列具有更为清晰的多重显像效果。

Polystyrene （PS） mesh was prepared with water drops as template. Water drops formed regular patterns under the refrigeration of solvent evaporation. After solvent evaporation, the regular patterns of polymer form mesh structures. An amphiphilic copolymer was added to stabilize the water drops to form a regular mesh. Water solution of polyvinyl alcohol（PVA） was filled into the mesh, and PVA spherical micro-lens arrays were obtained after drying and washing with chloroform. Peeling off the surface of PS mesh gave a PS pincushion structure, which had semi-spherical structure interspaces. PVA semi-spherical microlenses were prepared by PS pincushion structures as templates. Both the spherical and semi-spherical microlenses have a function of imaging. The result shows that semi-spherical has better imaging effect.