Yuhan Zhu,Fei Guo,Jing Li,Zhen Wang,Zihui Liang,Changhai Yi
Warp sizing is a key process in textile production. However, before the yarn/fabric finishing, such as dyeing, the paste adhering to the warp must be eliminated to ensure optimal dyeing properties and the flexibility of the fabric. Therefore, the sizing will often consume a lot of energy and produce a lot of industrial wastewater, which will cause serious harm to the environment. In this study, we have developed an energy saving and environmentally friendly starch-based slurry by modifying natural starch with acrylamide. The paste has excellent viscosity stability and fiber adhesion, and exhibits excellent performance during warp sizing. In addition, the slurry has good water solubility at 60–70 °C, so it is easy to desize at low temperatures. Because of this, the sizing of the warp can be deslimed directly from the yarn during subsequent washing processes. This work can not only reduce some costs for the textile industry, but also achieve the purpose of energy conservation and emission reduction.
The development of green and reversible yarn coatings is essential for addressing the intelligent and sustainable weaving demands of the global textile industry. However, current sizing agents, primarily reliant on non-covalent interfacial interactions, encounter significant challenges, including insufficient mechanical properties, substantial desizing effluent production, and non-biodegradability. Herein, a green, smart, redox-responsive keratin-based sizing agent has been developed, inspired by the natural dynamic covalent behavior of disulfide bonds. By enhancing covalent disulfide switches at the size/yarn interface and within the sizing films while reducing random coil conformations, this keratin sizes demonstrates markedly improved adhesion to cotton fibers and increased film fracture energy, with enhancements of approximately 47% and 550%, respectively. Its reductive responsiveness facilitates easy removal, achieving up to 99.9% desizing efficiency at a bath ratio of 1:10 under ambient temperature conditions. The sulfhydryl-enrichment modification of feather keratins promotes reversible protein conformational changes and controllable covalent bonding during both sizing and desizing processes. Life cycle analysis (LCA) indicates an 87.3% reduction in CO2 emissions compared to conventional petroleum-based polyvinyl alcohol (PVA) sizes, alongside additional energy and water savings attributable to the simplified desizing process and mild operating conditions associated with the keratin-based agents.
危险品化学品经营许可证（带存储）