Hamid Akbarpour - Department of Sewing and Garment Design Technology Engineering, Technical and Vocational University (Tohid), Amol, Iran.

In this paper was investigated dyeability cotton fabric sample using surface modification to corona discharged method. At first ,In accordance with the design of experiments, We exposed the samples to Corona conditions with power of ۱۰۰ (w) and the main current was ۴A applied, at ۶۰ and ۳۰۰ secs and then dyed with Reactive Yellow K-RN Dyes. Then, scanning electronic microscope(SEM) was used to determine the effects of this operation on the surface morphology and also, a reflective spectrophotometer was employed to evaluate K/S , %R and L* a* b* values. Experiments indicated that dye stability of the samples were good and but with increased time of Corona after washing it was decline. Also, results showed that greater time of Corona operation at a constant pressure, enhanced cracks and pores on the surface morphology of the samples. As, Fourier transform infrared (FTIR) spectroscopy test displayed the effects of the Corona operation on the determination of Surface changes as well as changes in the existing functional groups in fabric after being wash and finally, the optimal conditions of the experiment were determined using the statistical method of Central Composite Design. In fact, aim of this study was to investigate the dyeing properties of cotton fabric and surface morphology changes using corona operation and to obtain optimal dyeing conditions. The results obtained in this research illustrated that optimize condition of cotton fabric samples dyed with the Reactive Yelow۳ dye for K/S۱ and K/S۲ at F-value ,respectively, equal to ۲۹۸۷۹.۵۳ and ۱۵۹۴۰.۱۰,

Cotton fabric, Corona discharge, Reactive Yellow KRN, FTIR, Reflective Spectrophotometer