Dyeing Ramie Fabrics With Curcumin in NaOH/Urea Solution at Low Temperature

Abstract

To improve dyeing properties of ramie fabrics, sodium hydroxide/urea (NaOH/urea) was used as curcumin solvent and ramie-fiber swelling solvent. Ramie fabrics were dyed with curcumin in NaOH/ urea aqueous solution at low temperature without using any mordants. The color depth (K/S) value, washing fastness, ultraviolet-visible spectrophotometry were measured to investigate dyeing properties of the ramie with curcumin in NaOH/urea solution at low temperature. Meanwhile, X-ray diffraction and breaking strength were used to determine the structure of the ramie in NaOH/ urea solution. Curcumin could be dissolved completely in NaOH/urea solution, and crystallinity of ramie fiber was decreased a little. The K/S value of dyed ramie fabrics in NaOH/urea solution increased around 4-fold compared to dyed ramie fabrics in water. The dyed ramie fabrics in NaOH/ urea solution displayed good washing fastness. In addition, dyed ramie fabrics in NaOH/urea solution revealed anti-ultraviolet properties. Keywords curcumin, ramie fabric, NaOH/urea, anti-ultraviolet properties, mordant-free coloring Ramie, which feels cool to the touch and has high tensile strength and moisture absorption, is primarily used in fabric production (Cheek, 1990; Goda, Sreekala, Gomes, Kaji, & Ohgi, 2006). The environmental coloration process of ramie is crucial for adding value to the resulting textile production materials. Natural dyestuffs are very popular because of their long history, abundant availability, biocompatibility, low toxicity, biodegradability, and eco-friendliness (Zhou & Tang, 2016). In recent years, there has been growing interest in the revival of natural dyestuffs from plants, such as rubican, carthamin, hematin, gardenia yellow pigment, laccaic acid, tea pigment,

A study on the antibacterial property and biocompatibility of ramie fiber

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Optical Behavior of Curcuminoid Hybrid Systems as Coatings Deposited on Polyester Fibers

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