Bio- colouration of nylon fabric using natural dyes and mordants

ABSTRACT

Natural dyes offer a harmless alternative to synthetic counterparts, minimizing the release of toxic chemicals associated with synthetic dyes. In this investigation, nylon fabrics underwent dyeing with neem leaf extract under acidic, neutral and alkaline conditions along with lemon juice mordant. The study revealed that colour strength exhibited an increase with decreasing pH levels, with the mordanted fabric dyed in an acidic medium demonstrating the highest value. Analysis of colour coordinates indicated that the mordanted fabric dyed in an acidic medium exhibited superior colour pickup compared to the other samples. Enhanced fastness properties were achieved under acidic pH conditions when a mordant was used. The FTIR test result ensured the nylon-lemon juice-neem leaves extracted dye interaction. The EDX analysis also confirmed the elemental composition of neem leaves extracted dye in nylon assisted by lemon juice. The SEM test results validated the dyeing process empirically.

KEYWORDS:

• Nylon fabric
• natural dye
• neem leaves
• mordant
• lemon juice

Acknowledgments

The authors would like to thank for the financial support received by the European Commission under the cofounded Erasmus + project REWAFT reference 2022-1-LT01-KA220-HED-000086367. Views and opinions expressed are however those of the authors only and do not necessarily reflect those of the European Union or the European Education and Culture Executive Agency (EACEA). Neither the European Union nor EACEA can be held responsible for them.

Disclosure statement

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

Authors contributions

Tanvir Ahmed Chowdhury has contributed to conceptualisation, methodology, data collection and writing–original draft preparation. Md. Reazuddin Repon has contributed to conceptualisation, methodology, data collection and writing - original draft preparation. Md. Kamrul Islam, Alamgir Hossain and Nadim Khan Shanto have contributed to formal analysis, writing–editing and reviewing. Jahirul Islam Khandaker and Mohammad Abdul Gafur have contributed to resource, supervision of the project and writing-editing and reviewing. All authors have read and agreed to the published final version of this review.

Availability of data and materials

All data presented herein are constant with the published literature.