Laboratory of Physical Chemistry, Materials and Catalyse (LCPMC), Faculty of Sciences Ben M'Sick, University of Hassan II -, Casablanca, Morocco.
Laboratory of Physical Chemistry, Materials and Catalyse (LCPMC), Faculty of Sciences Ben M'Sick, University of Hassan II -, Casablanca, Morocco; Department of Traditional Weaving, Academy of Traditional Arts, Foundation of Hassan II Mosque, Casablanca, Morocco.
Int J Biol Macromol. 2024 May;268(Pt 2):131624. doi: 10.1016/j.ijbiomac.2024.131624. Epub 2024 Apr 18.
Lignin is an abundant natural biopolymer found in plant cell walls. Lignin can come from tinctorial plants, whose residual biomass after dye extraction was typically discarded as waste. The main objective of this study was to extract lignin from the residual biomass of Reseda luteola L. using an organosolv process and to optimize the extraction conditions. The extracted lignin was characterized, and its potential applications as an antimicrobial, anti-oxidant, and anti-UV agent were investigated. Response surface methodology based on a Box-Behnken design was employed to optimize the lignin extraction conditions (organic acid concentration, material-to-liquid ratio, extraction time). The extracted lignin was comprehensively characterized using NMR, FTIR, XRD, SEM-EDX, TGA, DSC, and UV-Vis techniques. The optimal extraction conditions yielded a remarkably high lignin recovery of 62.41 % from the plant waste, which was rarely achieved for non-wood plants in previous works. The extracted lignin exhibited excellent thermal stability and radical scavenging anti-oxidant activity but no significant antimicrobial effects. Treating wool fabrics with lignin nanoparticles substantially enhanced UV protection from the "good" to "excellent" category based on the UPF rating. This sustainable valorization approach converted abundant tinctorial plant waste into high-purity lignin with promising anti-oxidant and UV-blocking properties suitable for various applications.
木质素是一种丰富的天然生物聚合物，存在于植物细胞壁中。木质素可以来自于媒染植物，这些植物在提取染料后，其剩余的生物质通常被当作废物丢弃。本研究的主要目的是使用有机溶剂法从染料植物瑞香狼毒的剩余生物质中提取木质素，并优化提取条件。对提取的木质素进行了表征，并研究了其作为抗菌、抗氧化和抗 UV 剂的潜在应用。采用基于 Box-Behnken 设计的响应面法优化了木质素提取条件（有机酸浓度、固液比、提取时间）。采用 NMR、FTIR、XRD、SEM-EDX、TGA、DSC 和 UV-Vis 技术对提取的木质素进行了全面表征。最优提取条件下，从植物废料中获得了高达 62.41%的木质素回收，这在以前的非木质植物工作中很少达到。提取的木质素表现出优异的热稳定性和自由基清除抗氧化活性，但没有显著的抗菌效果。用木质素纳米粒子处理羊毛织物，根据 UPF 等级，将其紫外线防护从“良好”提高到“优秀”类别。这种可持续的增值方法将丰富的媒染植物废物转化为具有高纯度、抗氧化和抗紫外线性能的木质素，适用于各种应用。
