纳米再生蜘蛛包卵丝的纺制及其结构与性能

Spinning of nano-scale regenerated spider egg-case fiber and its structure and properties

以大腹圆蛛包卵丝的六氟异丙醇(HFIP)溶液为纺丝液,采用静电纺丝的方法制得直径小于100nm的纳米再生蜘蛛包卵丝。研究结果表明,在纺丝液的质量百分比为1%的条件下,电场强度取1.0～2.5kV/㎝时,能纺制得到连续、光滑、均匀的纳米再生包卵丝,并且在研究设定的工艺条件下,电压和喷丝头与接收屏之间的距离(C-SD)对纤维的形态结构没有实质性的影响。虽然与天然包卵丝相比,纳米再生包卵丝中呈规整的β-折叠结构的分子含量较少,纤维的结晶度也较低,但它具有稳定的几何形态,在水中几乎不收缩,并且拉伸强度与天然外层包卵丝相似。

The nano-scale regenerated spider egg-case fibers （ERESF） （average diameter 〈100nm） were obtained by electrospinning egg-case silk HFIP solution. The results show that continuous stain and uniform regenerated spider egg-case fibers can be produced by 1wt% solution with the electric field strength ranging from 1.0kV/cm to 2.5 kV/cm. Meanwhile, the voltage and C-SD have no great effect on the configuration of ERESF. The content of molecules with 13 sheet conformations and crystallity of ERESF are lower than that of natural egg-case silk. However, the ERESF non-woven mat is stable in water and has similar stress to natural out-egg-case silk.