模仿蚕丝的成分、结构和成丝方法,通过同轴干法纺丝初步制备了以添加有金属钙离子（Ca2＋）并调节了pH值的再生丝素蛋白（RSF）为芯层、丝胶蛋白（SS）为皮层的RSF/SS纤维。采用荧光显微镜、扫描电镜、拉曼光谱和材料试验机研究了所得纤维的微观形貌、二级结构和力学性能,并与纯RSF纤维和蚕丝进行了对比。研究结果表明同轴干法纺RSF/SS纤维具有清晰的皮-芯层结构,直径较粗且表面略有皱痕;与纯RSF纤维相比,该初生纤维具有更多的β-折叠构象,力学性能也相对较好,但与天然蚕丝相比尚有较大差距。
To biomimick the composition,core-shell structure and spinning process of the natural Bombyx mori silk,regenerated silk fibroin/sericin（RSF/SS） fiber with a core（RSF）-shell（SS） structure was preliminarily prepared by coaxial dry-spinning process.The morphology,secondary structure and mechanical property of the resultant fiber were characterized by fluorescence microscope,scanning electron microscope,Raman spectroscopy and material test machine,respectively.It was found that the coaxial dry-spun RSF/SS fiber had a clear core-shell structure,wrinkled surface and greater diameter.Although its properties were not yet good enough as those of natural silk,RSF/SS fiber had much superiority in the secondary structure and the mechanical property compared with the RSF fiber.
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