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.