静电纺定向排列纳米纤维阵列的研究(英文)

Electrospinning well-aligned fiber arrays through a modified collector

借助静电纺工艺,可以获得定向排列纤维,这些纤维具有细胞培养的培养基、组织工程支架、补强材料以及电子材料等较多的潜在用途.利用一种简单的接收装置同时获得了8组定向排列的静电纺纳米纤维阵列,这种接收装置是由8根交于中心的不锈钢棒组成.通过光学显微镜以及电镜观察可以发现,沿单轴定向排列的亚微米纤维横跨于两根临近不锈钢棒中间,整体外观与蜘蛛网相似.研究了电压和接收时间对纤维定向排列的影响,结果发现,随着电压的增加,定向排列的纤维长度会增加,而且,随着收集时间的增加,定向排列纤维产量和纤维的定向排列程度都会增加.实验结果表明,这种方法不仅简单、价廉而且产量高,同时还可以赋予纤维阵列较高的定向排列程度.

Through electrospinning, aligned fiber arrays can be obtained and have many potential applications： substrate of cell culture, tissue engineering scaffold, reinforeenent materials, and electronics. Eight groups of aligned electrospun fiber arrays were simultaneously fabricated by using a rather simple collector composed of eight stainless steel bars intersecting in the center. Under the optical microscope and SEM, uniaxiaUy well-aligned sub-microfibers were observed spanning across two adjacent bars. The overall appearance was like a spider web. Effects of applied voltage and collection time on fiber alignment were preliminarily studied. Longer aligned fibers were obtained with the increase of applied voltage. A larger production and an increased degree of alignment were gained with increased collection time. The experimental results indicate that this method is not only facile, inexpensive, and productive, but can also endow the fibrous array with a high degree of alignment.