Traditional cotton fiber dyeing requires an abundance of salt, which leads to environmental pollution. Consequently, decreasing or eliminating the use of salt has become the primary focus of current research. In this study, Crocein Orange G was used to dye carboxymethyl cotton. Carboxymethyl cotton has better color shades than raw cotton and it is used along with a mordant in a simultaneous-mordant dyeing process, at a pH of 7, Al 2 (SO 4 ) 3 ·18H 2 O as the mordant. In addition, it was found that the adsorption kinetics of carboxymethyl cotton followed a pseudo-second-order kinetic model. The equilibrium adsorption capacity increased as the temperature increased from 30 to 50 °C, and the maximum equilibrium adsorption was 8.21 mg g −1 at 50 °C. Furthermore, the adsorption isotherm data exhibited good agreement with the Freundlich isotherm. These results will help achieve salt-free dyeing of cotton fabric in the textile industry.
The use of auxiliaries for textile dyeing and printing and the release of residual dyeing liquor cause enormous harm to the environment, while the single function of dyed fabrics hinders their development in more advanced fields. In this work, zeolitic imidazolate framework-8 (ZIF-8) nanocrystals were grown in situ on carboxymethyl cotton fabric to absorb acid dyes without auxiliaries. To further improve its durability and color fastness, polymethylhydrosiloxane (PMHS) hydrophobic coating was used to protect its surface. The as-prepared cotton fabrics exhibited a K/S value of 21.78, a hydrophobic angle of 160.2° and a UPF value close to 50+. They showed high stability under various environmental conditions, which provided a simple and enviromental way to prepare multifunctional dyed textiles. The high hydrophobic angle of the fabric offered excellent adsorption of oil agent in the oil–water mixture, and the oil–water separation efficiency can still reach more than 95% even after 20 cycles, indicating that the fabric also had promising applications in the treatment of oiled wastewater.
Diabetic wounds management remains a significant global challenge due to impaired wounds healing, bleeding, and infection. Oxidative stress (OS), resulting from dysregulated mitochondrial reactive oxygen species (mtROS), plays a crucial role in the diabetic wounds pathogenesis. Furthermore, diabetic infected wounds can induce excessive ROS production and an acidic microenvironment due to the accumulation of bacterial metabolic products. Thus, a pH-sensitive intelligent dressing could serve as an ideal carrier for precise regulation of mtROS and promote faster diabetic wounds healing. In this study, we fabricated a pH-sensitive and mitochondria-modulating intelligent multilayered dressing system. We synthesized mesoporous silica-coated selenium particles (SS) for mtROS regulation and infection resistance. These SS were then loaded into a polyvinyl alcohol (PVA)/(N-[(2-hydroxy-3-trimethylamine) propyl] chitosan chloride, HTCC) hydrogel for pH-sensitive controlled release, blood coagulation, and antibacterial treatment. Finally, the resulting system was cross-linked with carboxymethyl cotton gauze (CG) to enhance hemostatic ability and reduce adhesiveness. Experimental results from cellular and animal models of diabetic wounds demonstrated that HTCC/PVA/SS-CG dressing promotes faster hemostasis, protects against microbial infection, and accelerates diabetic wounds healing through its mitochondria-modulating action, which offers a comprehensive treatment strategy for diabetic wounds and shows promising prospects for clinical transformation.
危险品化学品经营许可证（带存储）