Wang Ruochun, Sun Siwen, Wang Bijia, Mao Zhiping, Xu Hong, Feng Xueling, Sui Xiaofeng
Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, P. R. China.
Innovation Center for Textile Science and Technology of DHU, Donghua University, Shanghai, 201620, P. R. China.
Macromol Rapid Commun. 2021 Mar;42(6):e2000496. doi: 10.1002/marc.202000496. Epub 2020 Nov 16.
Hantzsch reaction is one of the typical multicomponent reactions (MCRs), and it is employed herein to endow cellulosic materials with fluorescent properties. For example, acetoacetyl (ACAC)-bearing cotton fabric prepared via transesterification with tert-butyl acetoacetate is subjected to an aqueous Hantzsch reaction with formaldehyde and ammonium acetate at ambient temperature. A strong fluorescent emission around 460 nm is achieved within 10 min. XPS, fluorescent spectroscopy, and elemental analysis are used to confirm the presence of 1,4-dihydropyridine (DHP) rings on the surface of the fabric. TGA, SEM, XRD, and mechanical testing results show that the modification process has minimum impact on intrinsic properties of the fabric. The strategy is also shown to be generally applicable to various forms of cellulosic materials and different aldehydes. This fast and simple approach enriches the application of MCR in modification of cellulose and cellulose derivatives.
汉茨希反应是典型的多组分反应（MCRs）之一，本文采用该反应赋予纤维素材料荧光特性。例如，通过与乙酰乙酸叔丁酯进行酯交换反应制备的含乙酰乙酰基（ACAC）的棉织物，在室温下与甲醛和醋酸铵进行水相汉茨希反应。在10分钟内即可实现460nm左右的强荧光发射。利用X射线光电子能谱（XPS）、荧光光谱和元素分析来确认织物表面存在1,4 - 二氢吡啶（DHP）环。热重分析（TGA）、扫描电子显微镜（SEM）、X射线衍射（XRD）和力学测试结果表明，改性过程对织物的固有性能影响最小。该策略还被证明普遍适用于各种形式的纤维素材料和不同的醛类。这种快速简单的方法丰富了多组分反应在纤维素和纤维素衍生物改性中的应用。
