Study the dyeing behavior of wool fabric using henna extract in decamethyl cyclopentasiloxane (D5) medium

Abstract

In this study, an eco-friendly dyeing method of wool fabric was adopted using natural dye extracted from henna leaves in the Decamethyl Cyclopentasiloxane (D5) medium. D5 was used to reduce the consumption of the high amount of water and salt needed in traditional dyeing. Wool fabric dyed with different amounts of Henna extract/Decamethyl Cyclopentasiloxane at different dyeing temperatures (40 $°\mathrm{C},\mathrm{ }60$ $°\mathrm{C},\mathrm{ }80°\mathrm{C}\mathrm{ }$ and$\mathrm{ }90°\mathrm{C}).$ Scanning electron microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDX) were used to study the effect of the D5 on the morphology and elemental composition of the fiber surface. The dyeing and fastness properties of the dyed fabric were also investigated. The results showed that the dye uptake, fixation rate, and color strength of the samples dyed in this system were higher than water-based dyed samples. The dye uptake rates of the samples dyed in this system were 77–83% as compared with 64–71% for the water-based dyed samples. SEM and EDX results illustrated that dyeing in the D5 medium did not show any adverse effect on the morphology and elemental composition of the fiber surface.

Keywords:

• Non-aqueous dyeing
• water conservation
• wool fabric
• Henna extract
• decamethyl cyclopentasiloxane (D5)

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the National Key Research and Development Program of China (2017YFB0309600), Key Technology Research and Development Project of Zhejiang Province (2017C03016) and Key Research and Development Program of Xinjiang Production and Construction Corps (2019AA001).