静电纺定向排列纳米纤维阵列的研究

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.     

The Influences of Ultrasonic on Embedding Nano Particles into Porous Fabric Materials

The feasibility of embedding 40 nm ZnO particles into porous textile material by using ultrasonic and its influence factors were studied. Through investigations, it is proved that the higher the concentration of nanoparticle suspension is, the higher the weight of embedding percentage （EPW） is. However, the increasing trend of EPW will minish quickly when the concentration exceeds 1%. In addition, the longer the process time of ultrasonic is, the higher EPW is. EPW is always higher when the distance between film and ultrasonic transducer is 1/2λ and 3/2λ, and lower when the distance is 1λ, and 2λ,. For 40 nm ZnO particles, EPW of the film effected by ultrasonic with the frequency of 42 kHz reaches the maximum.