丝素粉体与医用聚氨酯溶胶共混-热压共混膜的制备及性能

Preparation and Properties of the Blended Films of Polyurethane and Silk Fibroin Powder by the Method of Sol Mixing-Hot Pressure

采用溶胶共混-热压法成功制备出一系列丝素粉体/聚氨酯共混膜。利用扫描电子显微镜、红外光谱、X射线衍射、动态力学分析和拉伸实验对共混膜的形貌、结构和性能进行了表征,详细研究了丝素含量对共混膜形貌、结构及性能的影响。结果表明,聚氨酯和丝素粉体间存在一定的氢键相互作用,丝素小颗粒均匀分散在聚氨酯中,形成结构较致密的共混膜。溶胶共混-热压成膜法能够较好地提高二者的共混相容性,其工作提供了一种制备丝素粉体/聚氨酯生物医用材料的新途径。

The blended films of polyurethane and Silk fibroin powder（PU/SF） were successfully prepared by sol mixture-hot pressure method.The effects of the Silk fibroin ratio on the morphology、structure and properties of the blends were studied by scanning electron microscopy,infrared spectroscopy,wide-angle X-ray diffraction,dynamic mechanical thermal analysis,and tensile testing.The results reveal that intermolecular hydrogen bonding exists between Silk fibroin and polyurethane,leading to a homogeneous dispersion of Silk powder into polyurethane and a denser structure of blends.The method of sol mixture-hot pressure can better increase the compatibility of Silk fibroin and polyurethane in the blended films.This work provided a new pathway to prepare biomaterials made of polyurethane and Silk fibroin powder.