Eco-friendly sustainable adsorption dyeing of MOF-modified carboxymethyl cellulose fiber fabric using acid dyes

Abstract

The development of green processes for sustainable recycled dyeing is key to reducing the energy consumption and environmental harm caused by traditional textile dyeing. In this study, an easy fabrication process was used to obtain ZIF-8-modified cotton fabrics with a more uniform nanoparticle distribution. Furthermore, from the view point of green and clean dyeing and finishing, acid dyes could be adsorbed to modified cotton fabrics without consuming water, heat and discharging residual dyeing liquid, and it could also be used in batik to depict specific patterns. At the same time, the modified cotton fabrics had excellent UV protection and antibacterial effect while maintaining air and moisture permeability. During the adsorption of acid dyes, the modified fabric showed greater adsorption properties for the larger and more hydrophobic acid dye molecules during the adsorption of acid dyes,. The equilibrium adsorption capacity of the fabrics for acid red G and weak acid purple 4BNS were 6.21 mg·g-1 and 9.26 mg·g-1, respectively. The residual dyeing solution could be recycled to reduce wastewater discharge and environmental pressure. The prepared fabric had a UPF value of 44.695, indicating a good UV protection effect. The antibacterial activity of the modified fabrics was 94.11% against Escherichia coli and 94.30% against Staphylococcus aureus. This study provided a good idea for textile cleaning and dyeing. It not only increased the scope of the dyes used for dyeing cotton fabrics, but also provided a new strategy for the green and sustainable development of cellulosic fiber fabric dyeing.