Effect of self–assembled iron–tannic nanoparticles on the fastness and antibacterial properties of natural indigo dyed polyester cotton blended fabrics from Strobilanthes cusia (Nees) Kuntze

Abstract

In this study, self–assembled iron (III)–tannic nanoparticles (Fe–TA NPs) were synthesized at room temperature using a simple, low–cost, and reproducible method. The interaction between Fe3+ and TA, and the particle size of Fe–TA NPs with different mole ratios of ferric chloride and tannic acid were characterized by UV–vis spectroscopy and dynamic light scattering (DLS). The modified fabrics were fabricated by one–step depositing Fe–TA NPs onto the surface of natural indigo dyed polyester cotton blended fabrics using the exhaustion dyeing process. SEM, FTIR, Raman spectroscopy, and TGA were used to investigate the surface morphology, chemical structure, and thermal stability of the modified fabrics. According to the results, indigo–dyed fabrics treated with Fe–TA NPs showed an excellent antibacterial activity against both gram–negative (E. coli) and gram–positive (S. aureus) bacteria, improving of thermal stability, light fastness acceptance, washing fastness, and color fastness to heat.

An Observation on Dyeing Techniques of Polyester/Cotton Blended Fabrics Using Various Dyes

“…Because of their substantial endurance, minimal shrinkage, and suitable-care qualities, polyester/cotton (P/C) blended textiles are frequently utilized as fabrics. [22]. Additionally, one of the greatest significant organic dyes, vat blue dye, is obtained by extracting the indigo-rich plant Strobilanthes cusia (Nees) Kuntze.…”

“…Additionally, iron chloride is one of the metal-based mordants that's able to react with organic colorants and ultimately generate compounds of metals that improve durability characteristics. It is believed that a polydentate TA ligand can interact alongside ferric ions to create very stable self-assembling Fe-TA compounds [22].…”

“…The cloth was colored and subsequently airdried and rinsed in purified water to the point there was no shift in color to produce the (I1) cloth. [22].…”

“…On a scale used in laboratories, the liquid proportion between the fabric and the Fe-TA solution was fixed at 1:100. The treated textiles were cleaned with a 2 g/l soap and air-dried [22].…”

“…(Table 6) displays K/S values and material color coordinates. Additionally, the colored specimens' lightfastness, washability, and color permanence were assessed and given grades ranging from ideal (4) to outstanding (5) [22]. The P/C fabric was diagnosed using an assessment of the antibacterial activity of the treated samples using the AATCC 100 standard.…”