Structure and morphology of electrospun silk nanofibers
Structure and morphology of electrospun silk nanofibers
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DOI：
10.1016/j.polymer.2003.10.102
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发表时间：
2004-05
期刊：
影响因子：
4.6
通讯作者：
S. Zarkoob;R. Eby;D. Reneker;S. D. Hudson;Dale Ertley;W. W. Adams-W.
中科院分区：
文献类型：
--
作者：
S. Zarkoob;R. Eby;D. Reneker;S. D. Hudson;Dale Ertley;W. W. Adams-W.
用六氟-2-丙醇溶液生产家蚕和棒络新妇天然丝的纳米级纤维。通过光学、扫描电子显微镜和透射电子显微镜观察电纺纤维。这些纳米纤维表现出光学延迟，似乎具有圆形横截面，并且在氮气下热稳定至 280 °C (N. clavipes) 和 245 °C (B. mori)。纤维的直径约为 6.5-200 nm，比大多数蚕和蜘蛛纺出的天然丝小几个数量级。最小的纤维直径对应于棒猪笼草纤维横截面中的 200 个分子和家蚕纤维横截面中的 150 个分子。 B. mori 和 N. clavipes 的退火电纺纤维的电子衍射图显示出与自然纺丝相当的取向和晶序的衍射峰。
Nanoscale fibers of natural silks of Bombyx mori and Nephila clavipes were produced from solutions in hexafluoro-2-propanol. The electrospun fibers were observed by optical, scanning electron, and transmission electron microscopy. These nanofibers showed optical retardation, appeared to have a circular cross-section, and were thermally stable under nitrogen to 280 °C (N. clavipes) and to 245 °C (B. mori). The diameter of the fibers ranged from approximately 6.5–200 nm making them orders of magnitudes smaller than the natural silks spun by most silkworms and spiders. The smallest fiber diameters correspond to 200 molecules in the cross section of the N. clavipes fibers and 150 in B. mori. Electron diffraction patterns of annealed electrospun fibers of B. mori and N. clavipes exhibit diffraction peaks demonstrating orientational and crystalline order comparable to that of naturally spun silks.