Studying the effect of beta-cyclodextrin natural polymer for improving dyeing condition and reduction of environmental pollution

environmental and economic limitations that are imposed dramatically on textile and dyeing industry leads to the development of environmentally friendly processes for modifying the properties of fibers and improving the existing traditional processes. Many efforts have been done for decreasing costs and disposed contaminants which one of them is using natural polymers. The purpose of this study is applying beta-cyclodextrin natural polymer as an appropriate alternative with favorable environmental effects for other chemical additives in dyeing.

In this study, wool fiber amended/treated by β-Cyclodextrin biocompatible polymer and its dyeing features such as the effect of β-Cyclodextrin composition (%20-0/5), dyeing pH (3-7) and density of the dye (%5-75) on the dyeing capabilities of wool with madder dye color was evaluated and compared. And finally, physical changes of crude fiber and amended fiber after dyeing was amended/treated using SEM analysis.

According to the results, as the β-Cyclodextrin amount increased, the color strength of the samples are considerably enhanced and dye ability (K/S) is better in the case of modified wool rather than aluminium-mordanted wool and pristine wool. Besides, exhaustion of modified wool in neutral pH rather than acidic pH has been increased dramatically while no appreciable changes was observed in pristine wool dye ability with pH changes. Color strength (K/S) data were in the following order of the β-Cyclodextrin modified wool>.

In general, according to the conditions of modifying wool with β-Cyclodextrin biocompatible polymer and changes in dyeing conditions, not only removing chemical compounds from the wastewater of textile industrial can beapplied, but also the amount of consumed dye and unabsorbed dye remaining in wastewater can be reduced which is environmentally very important.