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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

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2022

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Vol. 30, no. 1 (151)

77--85

EN

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.

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Optimization of Sodium Lignosulfonate Treatment on Nylon Fabric Using Box–Behnken Response Surface Design for UV Protection

Singh Gangwar Arun Kumar, Shakyawar D B, Singh Mukesh Kumar, Vishnoi Prashant, Jose Seiko

Autex Research Journal

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2022

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Vol. 22, no. 2

248--257

EN

The effect of sodium lignosulfonate (LS) treatment on nylon fabric for enhancing its ultraviolet protection ability has been studied. Various concentrations of LS were applied on nylon fabric using the exhaust method and the treatment was optimized using Box–Behnken response surface design. The ultraviolet protection factor (UPF) is achieved, as high as 62.13 with one such LS-treated nylon fabric. The LS-treated nylon fabrics were characterized using FTIR, FESEM, Energy dispersive X-ray (EDX), and Thermo-gravimetric analysis (TGA) instruments. The UPF and color-strength (K/S) values are signifi cantly increased with an increase in the concentration of LS without any loss of tensile properties and thermal stability. The LS treatment has excellent wash fastness.

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Free radical scavenging ability of sodium lignosulfonate and its application in food grade polypropylene

Musajian Dilhumar, Hasan Gvlmira, He Mingyu, Yimit Mamatjan

Polish Journal of Chemical Technology

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2020

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Vol. 22, nr 2

56--66

EN

Sodium lignosulfonate (SL) was prepared from waste of cotton lignin (CL) through hydrothermal reaction method. Orthogonal experiment was designed with value of OIT as objective function. Polypropylene (PP) is a polymer produced by the addition polymerization of propylene. It is a white waxy material with a transparent and light appearance, which is widely used in food and pharmaceutical packaging. The results of GPC and TG analysis revealed that SL has stable thermal properties, which means that SL has the potential to be an antioxidant for PP materials. In addition, the scavenging effects of CL and SL were studied. The obtained results exhibited that the SL can obviously increase the scavenging effect on free radicals and it is a kind of new synthetic antioxidant with antioxidant property, which could effectively delay the oxidation of PP. Subsequent rheological experiments proved that the SL/PP sample can improve the heat-resistant oxygen performance of PP under the thermal oxygen shearing environment. Combined with the effect of SL on the mechanical properties of PP before aging, SL has a stabilizing effect on PP thermal oxygen aging.