热塑性聚氨酯/蚕丝蛋白粉体共混膜的制备及性能
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摘要
利用机械粉碎球磨的方法制备了微米级蚕丝蛋白(SF)粉体,并利用红外光谱(FT-IR)及扫描电镜SEM对粉体结构进行表征。将SF粉体与DMAc溶解的热塑性聚氨酯(TPU)溶液共混,制备了一系列不同质量比的TPU/SF共混膜,测试膜的强力及吸水性能。结果表明SF的加入大大提高了TPU膜的杨氏模量、拉伸强力及吸水性能,而断裂伸长率有所下降。
Micron-sized silk fibroin(SF)powder was prepared by mechanical grinding and ball-milling.The structure of SF powder was characterized by FT-IR and SEM.After blend of SF powder and TPU solution dissolved by DMAC,a series of TPU/SF blend films with different blend ratio were prepared.The tensile strength and water absorption capacity of blend films were tested.The results show that the addition of SF powder greatly improves the Young modulus,tensile strength and water absorption capacity of TPU films,while the elongation at break decreases to some extent.
Micron-sized silk fibroin(SF)powder was prepared by mechanical grinding and ball-milling.The structure of SF powder was characterized by FT-IR and SEM.After blend of SF powder and TPU solution dissolved by DMAC,a series of TPU/SF blend films with different blend ratio were prepared.The tensile strength and water absorption capacity of blend films were tested.The results show that the addition of SF powder greatly improves the Young modulus,tensile strength and water absorption capacity of TPU films,while the elongation at break decreases to some extent.
引文
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