再生丝素蛋白/聚乳酸共混纳米纤维膜的制备及性能

Regenerated Silk Fibroin/poly-L-lactide blend nanofibrous membranes were successfully prepared via electrospinning, and it was treated with Methanol then. The morphology、structure、thermal properties and mechanical properties of blend nanofibrous membranes were characterized and tested by use of FE-SEM, FT-IR, TGA, and tensile tester. The results show that the morphology of the blend nanofibrous membranes is fine and the diameters of the fibers increase with the addition of poly-L-lactide. The addition of poly-L-lactide have no influcement on the molecular structure of Regenerated Silk Fibroin, but improves the thermal properties and mechanical properties effectively. The diameters of blend nanofibrous membranes with 50/50 mass ratio increase after treatment with Methanol. The secondary structure of Regenerated Silk Fibroin will change from random to order after treatment of Methanol. The mechanical properties of blend nanofibrous membranes improve significantly, and the Young modulus、tensile strength、failure strain increases from 114MPa、27.4MPa、107.6% to 153MPa、35.2MPa、180.1% respectively.