In situ deposition of MnO2 nanoparticles on cellulosic denim via KMnO4 reduction: Parametric optimization and functional assessment
The widespread application of nano-finished fabrics has been limited by high production costs and complex synthesis methods. KMnO4 as a common oxidizing agent for denim discoloration oxidizes indigo dye and cellulosic chains, and turns insoluble MnO2. Here, MnO2 nanoparticles synthesized through an...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-06-01
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| Series: | Carbohydrate Polymer Technologies and Applications |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666893925001847 |
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| Summary: | The widespread application of nano-finished fabrics has been limited by high production costs and complex synthesis methods. KMnO4 as a common oxidizing agent for denim discoloration oxidizes indigo dye and cellulosic chains, and turns insoluble MnO2. Here, MnO2 nanoparticles synthesized through an easy, economical and rapid oxidation–reduction method without other chemical agents using KMnO4 as the precursor. The samples were colored brown after the processing characterized with FTIR, XRD, FESEM, EDX, MAP, TGA/DTGA, and their size was found to be about 50–70 nm. Considering the effect of four variables including temperature, pH, time, and concentration of KMnO4, the photocatalytic properties of the treated fabrics were compared according to MB dye discoloration under the ultraviolet A (UVA) radiation using Central Composite Design (CCD) class of Response Surface Methodology (RSM). The optimal sample showed the highest properties as the finished fabric removed 60 % of the MB solution under UVA light irradiation after 4 h. Also, this sample showed good UV protection, flame retardancy and hydrophobic characteristics, with a water contact angle of 141 ± 0.1°, enhanced breathability but a lower tensile strength. Further, this sample decreased growth of Gram-positive and Gram-negative bacteria about 50 % however the sample treated at boiling and pH=3 shows antibacterial activities of above 99 %. |
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| ISSN: | 2666-8939 |