聚酰胺含量对静电纺丝素纤维结构和性能的影响

Effect of polyamide on the structure and property of electrospun fibroin fiber

将质量分数分别为9%和12%的再生丝素甲酸溶液和聚酰胺6/66共聚物的甲酸溶液混合,在喷丝头到接收屏之间的距离(C-SD)为15 cm、电压为15 kV的条件下进行静电纺丝得到丝素/聚酰胺复合纤维。研究了聚酰胺的含量和纤维直径、结晶结构以及纤维毡的力学性能之间的关系,探讨了产品在乙醇处理后结构和性能的变化。研究发现,聚酰胺的加入不仅可以降低纤维直径,而且提高了纤维的结晶度和纤维毡的断裂强度;乙醇处理后纤维发生均匀溶胀,结晶度提高,纤维毡的断裂强度和在水中的尺寸稳定性增加。

Fibroin/polyamide blend fibers were electrospun with the mixture of 9% fibroin and 12% polyamide 6/66 copolymer formic acid solutions at 15 kV voltage and 15 cm distance from the tip of capillary to collecting screen （C-SD）. The effects of polyamide content on the diameter and crystal of fiber and the mechanical properties of fiber mat were investigated. After being treated by ethanol, the morphology and performance of electrospun fibroin/polyamide fibers were analyzed. The results indicated that addition of polyamide in the fibroin formic acid solution not only decreased the diameter of fiber, but also improved its crystal and breaking strength of fiber mat. Electrospun fibroin/polyamide fibers treated by ethanol exhibited even swelling and higher crystallinity than as-spun ones, and the fiber mat was stronger and more stable in water.