Synthesis and Application of Azo Dyes Derived From the Methanolic Extract of Cissus Populnea as the Coupling Component on Nylon 6, 6

International Journal of Research and Scientific Innovation (IJRSI) | Volume VII, Issue XII, December 2020 | ISSN 2321–2705

Synthesis and Application of Azo Dyes Derived From the Methanolic Extract of Cissus Populnea as the Coupling Component on Nylon 6, 6

Agho, O.B.*, Obadahun J., Feka D.P., Magaji I.Y., Susanna A.O., Enyeribe C.C
Nigerian Institute of Leather and Science Technology (Nilest), Zaria Department of Science Laboratory Technology,  P.M.B1034, Samaru, Zaria. Kaduna state
Corresponding Author*

ABSTRACT:- Three different dyes derived from the methanolic extract of Cissus populnea as the coupling component with Sulphanilic acid, 4-aminophenol and 4-chloroaniline was successfully synthesized. The identity of the plant extract and dyes were investigated using spectroscopic analysis such as Uv-visible spectrometry and Fourier Transform Infra-red Spectrometry. The dyes absorbed within the visible region of the electromagnetic spectrum DMSO, methanol and acetone but the Uv-visible of the dyes in DMSO was more bathochromic with wavelength range of 605-607 nm as compared to that of methanol (498-500 nm) and acetone (397-403 nm). The infra-red spectra of the extract and dyes confirmed the presence of chromophores such as OH, C=O, N-H, -C-H, C=C and N=N in the dyes, which account for the colored nature of the extract and dyes. The dyes gave brown shades on nylon 6, 6 and exhibited good to very good fastness properties on the dyed fabric. For wash fastness, it was between 3 (good) and 4 (very good), while for light fastness it was between 6 (good) and 4 (moderate).

Keywords: Azo dyes, Nylon 6, 6, Fastness Properties, Diazotization and coupling.

1.0 INTRODUCTION

The art and science of dyes began more than 10,000 years ago. The very first dyes may have been crude components made from plants mixed with water by early uncivilized man for the purpose of tribal rituals, to identify or differentiate class of status group or simply amuse children with colours (Shore, 1990).
Dyes from natural resources especially from plants are increasingly becoming important alternatives to synthetic dyes for use in the textile industry (Samanta et al., 2007). Unlike synthetic dyes which have been found to be toxic and harmful to the environment, natural dyes are biodegradable, non-toxic and generally have higher compatibility with the environment when comparable to synthetic counterparts. The use of non-allergic, non-toxic, eco-friendly and biodegradable natural coupling components in dye synthesis has become a matter of importance. Thus synthetic dyes however produce skin allergy, toxic wastes and other harmfulness to humans and environment and therefore there is need to synthesize dyes that are less toxic, biodegradable and with good colouristic properties by using a natural coupling component (Ozan, 2011).
Some synthetic dyes are toxic to humans and not biodegradable. Therefore, the need to synthesized eco-friendly dyes by incorporating natural coupler from plant origin into the synthetic process in order to reduce the toxicity and harms they cause to humans and to make it biodegradable becomes of paramount important.

Read More