Liu Wensheng,Yu Fanjun,Gui Chengsheng,Shen Yunfang,Qiu Zhe,Xiao Zefang,Zhang Tianpeng,Xie Yanjun
Currently, wood dyeing technology plays an important role in its enhancing aesthetics and market competitiveness. However, still facing the dual challenges of insufficient color fastness of dyeing and environmental pollution caused by dye wastes generated during the dyeing process. Herein, an efficient and environmentally friendly dyeing method was proposed to improve color fastness utilizing chemisorption and electrostatic adsorption in low concentration dyeing solution. The chemical modification of Ayous wood using 2,3-epoxypropyltrimethylammonium chloride was carried out by introducing the cationic groups to reduce the dyeing resistance and increase the binding force of dye molecules on the wood. Kinetic and thermodynamic analyses revealed that the adsorption behavior between cation-modified bleached wood (CBW) and acid dyes adheres to the quasi second-order kinetic model (R 2 = 0.98) and Freundlich isothermal model (R 2 = 0.91), suggesting an adsorption process in which chemical adsorption dominated. Therefore, there was a significant increase in color fastness. Compared to the traditional dyeing method, the quantity of dyes consumed in this method can be reduced by 40%, significantly diminishing the environmental load of dyeing waste liquid. This study offers an efficient and environmentally friendly modification strategy for wood dyeing, highlighting a potential of CBW for practical applications.
The continuous basalt fibers (BFs) dyed with cationic dyes (RhB) were prepared through one-step drawing strategy using miscible liquids of phosphorylating starch (PS) cross-linked polyvinyl alcohol (PVA) and sodium silicate (SS) as infiltration agents. The new method of dyeing was relied on the residual temperature of melt drawing, and the dye molecules were lubricated onto fibers firmly. Different means were used to characterize the color fibers, and a compact layer was formed on the fiber surface. The prepared composite fibers (PVA-SS-PS-RhB/BF) exhibited stable color fastness (washing and rubbing fastness achieved to 4–5 grade). The crosslinking significantly improved the water resistance with dissolved residue up to 80%, and the heightened glass transition temperature was observed. The breaking force of dyed fibers was observed to be 50.3% higher than that of raw fibers, and the breaking elongation was 71.8% higher than the original fibers.
危险品化学品经营许可证（带存储）