静电纺再生加工对横纹金珠丝微观结构的影响

 蜘蛛丝因其优异的力学性能和良好的生物相容性引起了学者的广泛关注。为此在研究横纹金珠丝在六氟异丙醇（HFIP）中溶解性能的基础上，采用静电纺丝的方法制备再生横纹金珠丝（框丝、卵袋内层丝、卵袋外层丝），分析比较再生横纹金蛛丝和天然横纹金蛛丝在形态结构、分子构象、结晶结构以及热稳定性方面的差异。结果发现：静电纺再生框丝呈扁平带状，带宽为(751±196)nm，卵袋内层丝和卵袋外层丝直径分别为(141±46)nm和(105±37)nm。X衍射图谱和TG-DTA测定结果表明，静电纺再生加工后，横纹金珠丝结构由silkⅡ向silkⅠ转变、结晶度下降、主要热分解温度降低。

Influence of electrospinning on microstructure of regenerated Argiope bruennichi silk

Spider silk has attracted wide attentions of scholars and researchers due to its excellent mechanical properties and good biocompatibility in recent years.The regenerated Argiope bruennichi silk(scaffolding silk,egg case inner cover silk,egg case outer cover silk) was prepared by electrospinning on the basis of studying the solubility of Argiope bruennichi silk in 1,1,1,3,3,3-hexafluoro-2-propanol(HFIP).The morphology,molecular conformation,crystallinity and thermal property of the natural Argiope bruennichi silk and the electrospun Argiope bruennichi silk were compared.The results indicated the electrospun regenerated Argiope bruennichi silk was flat ribbon with the bandwidth(751±196) nm and a diameter of egg case inner cover silk and egg case outer cover silk(141±46) nm and(105±37) nm,respectively.The XRD and TG-DTA analysis showed that the crystal structure of electrospun Argiope bruennichi silk has changed from silkⅡ to silkⅠ,and the crystallinity and main thermal decomposition temperature decreased.