MWNTs改性再生丝素蛋白/聚乳酸复合纳米纤维膜的制备及性能

surface modified Multi-walled carbon nanotubes was made into Regenerated Silk Fibroin/poly-L-lactide Composite Nanofibrous Membranes via electrospinning, using a rotating mandrel. The effects of three means of the orientation、MWNTs reinforcement and Methanol treatment on the mechanical properties of Regenerated Silk Fibroin/poly-L-lactide blend system. The morphology、structure、thermal properties and mechanical properties of Composite Nanofibrous Membranes were characterized and tested by use of FE-SEM,TEM, FT-IR, TGA and tensile tester. The results show that the fiber is significantly aligned and the diameters of the fibers decrease with the collector speed increases from 1000rpm to 2000rpm. The diameters of the fibers with 0.1%MWNTs decrease under the same speed and the diameters increase after the Methanol treatment. Alignment of MWNTs can be visualized along the fiber axis. The add of MWNTs or fiber orientation both have no influcement on the molecular structure of each agent, but that of Silk will change into β-sheet conformation. The thermal properties and mechanical properties of Composite Nanofibrous Membranes both are improved with the alignment of the fibers and MWNTs contents changing from 0.1% to 1.0%.