取向再生丝素蛋白/聚乳酸皮芯结构复合纳米纤维膜的制备及性能

ligned Regenerated Silk Fibroin/poly-L-lactide shell-core structured composite nanofibrous membranes were prepared by coaxial electrospinning, using a rotating mandrel. The morphology and mechanical properties of composite nanofibrous membranes were characterized and tested by use of FE-SEM,TEM and tensile tester. The results show that the diameters of the fibers increase with the increase of single core or shell spinning solution content. The fiber is significantly aligned and the diameters of the fibers decrease with the collector speed becoming 2000rpm. The typical shell-core structure of composite nanofibrous membranes can be found by observing the images of TEM and fracture surface SEM. With the fibers becoming aligned, the tensile strength of composite nanofibrous membranes increases from 24.4MPa to 32.6MPa, and the failure strain decreases from 57.4% to 22.9%.