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<p>Colored textiles with antibacterial properties are highly sought in the healthcare sector for surgical gowns and baby aprons. The study developed a novel, environmentally friendly process for producing dyed cellulose fabric with antibacterial properties. We investigated the use of <i>Aloe vera</i> leaf extract as an ecologically friendly reductant for vat-dyeing and the in situ synthesis and application of silver nanoparticles (SNPs) on cellulose fabric. The vat-dyed/SNP-finished cellulose fabric exhibited good color fastness, antibacterial, and UV protection performance, along with acceptable tensile strength, elongation, wettability, air permeability, crease recovery angle, and thermal stability. The SNPs expressed a narrow <i>z</i>-average size distribution. Surface chemical analysis expressed the successful application of nano-silver and vat dye on the cellulose fabric. DSC analysis revealed that the crystallization temperature of the cellulose fabric increased after nano-silver treatment. The enhanced crystallinity of the vat-dyed/SNP-treated cellulose fabric is also evident in its diffraction pattern, which exhibits crystalline peaks at 2<i>θ</i> angles of 17.6°, 22.3°, 26.0°, 35.3°, and 53.0°. The untreated cellulose showed a tensile strength of 250 N, while the vat-dyed/SNP-treated cellulose fabric had a tensile strength of 231 N. The treated cellulose fabrics expressed good antibacterial and UV protection properties. The vat-dyed/SNP-treated cellulose fabric expressed notable stability at pH 7. Overall, the <i>A. vera</i> leaf extract was qualified as the bio-based reductant for the co-reductive silver nano-finishing and vat-dyeing of cellulose fabric, making the process viable and sustainable.</p>

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Co-reductive Vat Dyeing and Silver Nano-finishing of Cellulose Fabric Using Aloe vera Leaf Extract as a Bio-based Reductant

  • 期刊论文

  • 发表日期：

    2025年11月10日

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  • Muhammad Riaz Khan,
  • Zulfiqar Ali Raza,
  • Amjed Javid,
  • Hafiz Shahzad Maqsood

摘要

Colored textiles with antibacterial properties are highly sought in the healthcare sector for surgical gowns and baby aprons. The study developed a novel, environmentally friendly process for producing dyed cellulose fabric with antibacterial properties. We investigated the use of Aloe vera leaf extract as an ecologically friendly reductant for vat-dyeing and the in situ synthesis and application of silver nanoparticles (SNPs) on cellulose fabric. The vat-dyed/SNP-finished cellulose fabric exhibited good color fastness, antibacterial, and UV protection performance, along with acceptable tensile strength, elongation, wettability, air permeability, crease recovery angle, and thermal stability. The SNPs expressed a narrow z-average size distribution. Surface chemical analysis expressed the successful application of nano-silver and vat dye on the cellulose fabric. DSC analysis revealed that the crystallization temperature of the cellulose fabric increased after nano-silver treatment. The enhanced crystallinity of the vat-dyed/SNP-treated cellulose fabric is also evident in its diffraction pattern, which exhibits crystalline peaks at 2θ angles of 17.6°, 22.3°, 26.0°, 35.3°, and 53.0°. The untreated cellulose showed a tensile strength of 250 N, while the vat-dyed/SNP-treated cellulose fabric had a tensile strength of 231 N. The treated cellulose fabrics expressed good antibacterial and UV protection properties. The vat-dyed/SNP-treated cellulose fabric expressed notable stability at pH 7. Overall, the A. vera leaf extract was qualified as the bio-based reductant for the co-reductive silver nano-finishing and vat-dyeing of cellulose fabric, making the process viable and sustainable.