Li Zhan-Chao, Li Wei, Wang Rui, Wang Dong-Xia, Tang An-Na, Wang Xiao-Peng, Gao Xiao-Ping, Zhao Gai-Ming, Kong De-Ming
Henan Key Laboratory of Meat Processing and Quality Safety Control, College of Food Science and Technology, Henan Agricultural University, Zhengzhou 450002, People's Republic of China; State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Research Centre for Analytical Sciences, College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China.
State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Research Centre for Analytical Sciences, College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China.
J Hazard Mater. 2023 Apr 15;448:130821. doi: 10.1016/j.jhazmat.2023.130821. Epub 2023 Jan 18.
Lignin, the most abundant source of renewable aromatic compounds derived from natural lignocellulosic biomass, has great potential for various applications as green materials due to its abundant active groups. However, it is still challenging to quickly construct green polymers with a certain crystallinity by utilizing lignin as a building block. Herein, new green lignin-based covalent organic polymers (LIGOPD-COPs) were one-pot fabricated with water as the reaction solvent and natural lignin as the raw material. Furthermore, by using paraformaldehyde as a protector and modulator, the LIGOPD-COPs prepared under optimized conditions displayed better crystallinity than reported lignin-based polymers, demonstrating the feasibility of preparing lignin-based polymers with improved crystallinity. The improved crystallinity confers LIGOPD-COPs with enhanced application performance, which was demonstrated by their excellent performances in sample treatment of non-targeted food safety analysis. Under optimized conditions, phytochromes, the main interfering matrices, were almost completely removed from different phytochromes-rich vegetables by LIGOPD-COPs, accompanied by "full recovery" of 90 chemical hazards. Green, low-cost, and reusable properties, together with improved crystallinity, will accelerate the industrialization and marketization of lignin-based COPs, and promote their applications in many fields.
木质素是天然木质纤维素生物质中最丰富的可再生芳香族化合物来源，由于其含有丰富的活性基团，作为绿色材料具有多种应用潜力。然而，利用木质素作为构建单元快速构建具有一定结晶度的绿色聚合物仍然具有挑战性。在此，以水为反应溶剂，天然木质素为原料，一锅法制备了新型绿色木质素基共价有机聚合物（LIGOPD-COPs）。此外，通过使用多聚甲醛作为保护剂和调节剂，在优化条件下制备的LIGOPD-COPs表现出比已报道的木质素基聚合物更好的结晶度，证明了制备具有更高结晶度的木质素基聚合物的可行性。结晶度的提高赋予了LIGOPD-COPs增强的应用性能，这在其用于非靶向食品安全分析的样品处理中的优异性能中得到了证明。在优化条件下，LIGOPD-COPs几乎完全去除了不同富含植物色素的蔬菜中的主要干扰基质——植物色素，同时90种化学危害实现了“完全回收”。绿色、低成本和可重复使用的特性，以及提高的结晶度，将加速木质素基COPs的工业化和市场化，并促进其在许多领域的应用。
