This study presents a sustainable approach to the fabrication of multifunctional polyester fabric with bioactive natural colourant curcumin through a water free supercritical CO₂ dyeing technique. A simple dyeing process was carried out in which curcumin powder dye was directly applied to polyester fabric in scCO₂ medium without involving mordant chemicals and fabric pre-treatment procedures. The colour, bioactivity, and durability properties of the dyed samples were characterized. Results showed that the colour strength increases when the dye concentration increases and higher colour strength (K/S value above 17) could be achieved using low curcumin concentration (ca. 0.75 % owf). Moreover, the dyed fabrics displayed desirable antimicrobial, antioxidant, and UV-protection activities with acceptable colour fastness to washing and rubbing. This study opens a new view towards the sustainable fabrication of coloured and bioactive polyester fabric using curcumin via a resource-efficient and eco-friendly scCO₂ dyeing technique.

这项研究提出了一种通过无水超临界CO ₂染色技术，用生物活性天然着色剂姜黄素生产多功能聚酯织物的可持续方法。进行了简单的染色过程，其中姜黄素粉末染料在scCO _2中直接应用于聚酯织物介质，不涉及有害化学物质和织物预处理程序。表征了染色样品的颜色，生物活性和耐久性。结果表明，当染料浓度增加时，色强度增加，而使用低姜黄素浓度（约0.75％owf）可以实现更高的色强度（K / S值高于17）。此外，染色的织物显示出所需的抗微生物，抗氧化剂和紫外线保护活性，并且具有耐洗和摩擦的可接受的色牢度。这项研究为利用姜黄素通过资源节约型和生态友好型scCO ₂染色技术可持续制造有色和生物活性聚酯织物开辟了新的视野。