سال انتشار: ۱۳۹۰

محل انتشار: کنفرانس بین المللی فرآورش پلیمرها

تعداد صفحات: ۴

نویسنده(ها):

m Salehi Esfandarani – Textile Engineering Department, Amirkabir University of Technology, Tehran, Iran
ms Johari – Textile Engineering Department, Amirkabir University of Technology, Tehran, Iran
r Amrollahi – Faculty of Physics, Amirkabir University of Technology, Tehran, Iran
m Karimi – Textile Engineering Department, Amirkabir University of Technology, Tehran, Iran

چکیده:

Among different polymeric material, the surface of fibrous materials could be effectively modified using laser assisted treatment methods. But there is a surprising lack of research on the surface modification of polymeric nanofibers by lasers. The application of nanofibers could be greatly enhanced by producing uniform fibers with novel compositions and morphologies such as increasing surface area and porosity of the fibers. The purpose of the work presented here is, therefore, to analyze the effect of laser pulse number and pulse fluence on the surface area of nanofibers with a new selective laser etching method, without any side effect to the bulk polymer of nanofibers. In order to understand clearly any correlation between surface modification and the number of pulses, the surface morphology of samples prepared by varying the pulse number and compared. Efficient multi-photon absorption sites was observed to increase with increased the number of laser pulses, and etching takes place all over the surface illuminated with laser light and increases the surface roughness. Changes on the surface morphology have been analyzed as a function of pulse fluence. So with keeping two pulse number fixed, nanofibers irradiated with different fluence. It is observed that frequency of modified sites on the nanofibers are directly affected by laser pulse fluence. Laser surface modification of nanofibers shows great potential for the future widespread uses of lasers to develop nanofibers applications.