Cheng Jinting, Zhang Yong, Gopalakrishnakone Ponnampalam, Chen Nanguang
Division of Bioengineering, Faculty of Engineering, National University of Singapore, Singapore 117574.
Langmuir. 2009 Jan 6;25(1):51-4. doi: 10.1021/la8035264.
Porous polyurethane films with well-ordered pores were prepared using polystyrene microspheres as a template, and the surface pore sizes were tuned using a new upside-down (USD) method. After polystyrene microspheres were self-assembled on a substrate and the voids between microspheres were infiltrated with a polyurethane prepolymer solution, the samples were placed upside down to allow the prepolymer solution to flow back before it was solidified. The surface pore sizes of the porous films were tuned by changing the time in which the samples were placed upside down. Using microspheres of the same size, we prepared porous polyurethane films with surface pore sizes ranging from 32 to 87% of the templating microsphere size.
以聚苯乙烯微球为模板制备了具有有序孔隙的多孔聚氨酯薄膜，并采用一种新的倒置（USD）方法调节其表面孔径。将聚苯乙烯微球自组装在基底上，并用聚氨酯预聚物溶液填充微球之间的空隙后，将样品倒置，使预聚物溶液在固化前回流。通过改变样品倒置的时间来调节多孔薄膜的表面孔径。使用相同尺寸的微球，我们制备了表面孔径范围为模板微球尺寸的32%至87%的多孔聚氨酯薄膜。
