空间电场作用下聚合物形貌演变及光学性能研究

Morphological Evolutions and Optical Properties of Polymers in the Space Electric Field

聚合物薄膜表面的微纳结构具有独特的光学性能,在柔性电子和显示器件中有潜在的应用前景。而空间电场是构建表面形貌的有效手段。本研究以光固化聚氨酯(PU)为对象,用comsol软件模拟了空间电场作用下PU预聚体的介电常数、黏度、表面张力、电压对形貌的影响。进一步通过实验,在600 V空间电场制备出高度为327μm的柱状阵列微结构PU透明薄膜。该薄膜在380~750 nm波段,其出光效率提升了18%,且微结构对色温没有影响。

The micro-nano structures of the polymer film surfaces have unique optical properties,which have potential applications in flexible electronics and display devices.The space electric field is an effective method to construct the surface morphology.The object of this study was photocurable polyurethane(PU),the comsol software was used to simulate the effects of dielectric constant,viscosity,surface tension,and voltage on the morphology of PU prepolymer in the space electric field.The results show that the PU transparent film containing columnar array microstructures with a height of 327μm is prepared in a space electric field of 600 V.In the band of 380-750 nm,the luminous efficiency of the film is 18%higher than that before the film is placed,and the microstructures have no effect on the color temperature.