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Sodium Lignosulfonate: an Industrial Bio-Waste for the Colouration and UV Protective Finish of Nylon Fabric

Singh Gangwar Arun Kumar, Singh Mukesh Kumar, Vishnoi Prashant, Shakyawar D. B., Maity Subhankar

Fibres & Textiles in Eastern Europe

2022

Vol. 30, no. 1 (151)

77--85

Sodium lignosulfonate (NLS), a biomass waste procured from paper and pulp industries as brown colour water soluble powder, is explored in this article as dye for nylon 6 fabrics in aqueous media by the exhaustion method. The fastness and functional properties of the dyed nylon 6 fabrics were studied. The dyeing process parameters were optimised using Box–Behnken response surface design and the ANOVA technique. The NLS treated dyed nylon fabric exhibited an excellent ultraviolet protection factor (UPF), as high as 62.13. The NLS dyed nylon fabrics were characterised using FTIR, FESEM, EDX and instruments. The ultraviolet protection factor (UPF) and colour strength (K/S) values are significantly increased with an increase in the concentration of NLS without any loss of tensile properties and thermal stability. Moreover, NLS treatment has excellent wash fastness. This dyeing process for synthetic fibre like nylon can be a cleaner and more eco-friendly approach by utilising waste biomass of paper from the pulp industries.

New Approach for Dyeing and UV Protection Properties of Cotton Fabric Using Natural Dye Extracted from Henna Leaves

Omer K. A., Tao Z., Seedahmed A. I.

Fibres & Textiles in Eastern Europe

2015

Vol. 23, no. 5 (113)

60--65

A new approach for the dyeing and UV protection of cotton fabric using Henna extract was investigated. In this study, 3-chloro-2-hydroxy propyl, trimethylammonium chloride was used to substitute metallic mordants (heavy-metal salts) in the pre-treatment of cotton fabric. This will eventually prevent heavy metal pollution as well as facilitate dyeing without the addition of salt. Cationised cotton fabrics were dyed with Henna extract at different dyeing temperatures for different dyeing times. Colour strength, fastness properties (washing, rubbing and light), UV-blocking and tensile strength were investigated. Cationised fabric dyed with Henna extract exhibited outstanding enhancement in UV protection with minimal impact on the tensile strength. Enhancement or decrement in UV protection and colour strength was found to be governed by the dyeing temperature and dyeing time.

W prawadzonych badaniach zastosowano chlorek 3-chloro-2-hydroxypropylo-trimetylooamonowy dla zastąpienia metalicznych zapraw (soli metali ciężkich) do wstępnej obróbki materiałów bawełnianych. Powinno to zapobiec zanieczyszczeniu ciężkimi metalami, jak również ułatwić barwienie bez dodatku soli. Kationizowane materiały bawełniane były barwione ekstraktem henny przy rożnych temperaturach i czasach barwienia. Badano intensywność koloru, odporność na pranie, tarcie i światło, jak również lokowanie promieniowania UV i właściwości wytrzymałościowe. Kationizowane materiały barwione za pomocą ekstraktu henny wykazywały wybitne zwiększenie barierowości UV przy minimalnym wpływie na wytrzymałość mechaniczną. Na zwiększenie lub spadek właściwości zabezpieczających przed UV i intensywność koloru miały wpływ temperatura i czas barwienia.