Reactive modified curcumin for high-fastness nonaqueous SC-CO2 dyeing of cotton fabric
Reactive modified curcumin for high-fastness nonaqueous SC-CO2 dyeing of cotton fabric
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DOI：
10.1007/s10570-020-03504-z
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发表时间：
2020-10
期刊：
影响因子：
5.7
通讯作者：
Mingyue Wang;M. Liu;Hongjuan Zhao;Xiaoqing Xiong;Laijiu Zheng
中科院分区：
文献类型：
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作者：
Mingyue Wang;M. Liu;Hongjuan Zhao;Xiaoqing Xiong;Laijiu Zheng
改性姜黄素具有毒性低、溶解度高、改性后变色小等优点，非常适合于非水超临界二氧化碳棉染色。然而，现有的姜黄素修饰技术主要集中在改善其溶解性上。改性姜黄素直接吸附在棉织物上，主要作用力为范德华力，导致改性姜黄素对棉织物的染色牢度较差。在本研究中，将活性基团(羟基烷基)引入到姜黄素中，以提高其对棉织物的牢度。结果表明，与烷基类似，羟基烷基能提高改性姜黄素在超临界二氧化碳中的溶解度，从而提高染色后棉织物的色深。改性姜黄素在超临界二氧化碳中的溶解度越高，染色后棉织物的K/S值越高。此外，改性后的姜黄素表面的羟基可以与棉织物上的羟基形成醚键。因此，羟基姜黄素染色棉织物的耐洗牢度和摩擦牢度均好于烷基姜黄素染色棉织物。
AbstractModified curcumin, which has the advantages of low toxicity, high solubility, and little color change after modification, is very suitable for nonaqueous supercritical carbon dioxide cotton dyeing. However, the existing curcumin modification technology focuses on improving its solubility. Modified curcumin is directly adsorbed onto cotton fabrics, and the main interaction forces are van der Waals forces, which causes the poor fastness of modified curcumin to dyed cotton fabrics. In this study, reactive groups (hydroxyalkyls) were introduced into curcumin to enhance its fastness to cotton fabrics. The results showed that, similar to alkyl groups, hydroxyalkyl groups can enhance the color depth of dyed cotton fabrics by elevating the solubility of modified curcumin in supercritical carbon dioxide. The higher the solubility of modified curcumin in supercritical carbon dioxide was, the higher the K/S value of the dyed cotton fabric. Furthermore, the hydroxyl groups on the modified curcumin could form ether bonds with the hydroxyl groups on cotton fabrics. Therefore, the washing and rubbing fastness of hydroxyalkyl-curcumin-dyed cotton fabric was better than that of alkyl-curcumin-dyed cotton fabric.Graphic abstract