Nanofibers have raising increasing interest for a wide class of applications due to the excellent properties, ranging from life science and water treatment to energy conversion. In this study results of the cold pad batch dyeing, a well-known ecofriendly method of dyeing, of Cellulose Nanofiber webs with reactive dye, CI Reactive Violet 5, by using ultrasonic and conventional method presented. In order to prepare cellulose nanofibers, the electrospinning and subsequent deacetylation of cellulose acetate (CA) has been done. The color strength (K/S) and color fastness of dyed cellulose nanofibers assessed. Scanning electron microscopy and Fourier transform infrared spectroscopy were applied to investigate morphology and chemical structure of nanofibers respectively. The results indicates that K/S value increased around 5-8% with utilizing ultrasonic method for dyeing in same condition. In addition the samples dyed with ultrasonic show more washing fastness. The cellulose nanofiber in both method show nearly the same light fastness.
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