Biotechnology Research Institute, National Research Council of Canada , 6100 Royalmount Avenue, Montréal, Québec, Canada H4P 2R2.
J Agric Food Chem. 2011 Oct 12;59(19):10505-16. doi: 10.1021/jf202452m. Epub 2011 Sep 12.
Wheat straw soda lignin was modified and characterized by several qualitative and quantitative methods such as (31)P NMR spectroscopy to evaluate its potential as a substitute for polyols in view of polyurethane applications. Chemical modification of the lignin was achieved with propylene oxide to form lignopolyol derivatives. This was performed by a two-step reaction of lignin with maleic anhydride followed by propylene oxide and by direct oxyalkylation under acidic and alkaline conditions. The physical and chemical properties of lignopolyols from each method and the subsequent chain-extended hydroxyl groups were evaluated. Direct oxyalkylation of lignin under alkaline conditions was found to be more efficient than acidic conditions and more effective than the two-step process for preparing lignopolyol with higher aliphatic hydroxyl contents.
麦草碱木素通过（31）P 核磁共振波谱等多种定性和定量方法进行了改性和表征，以评估其作为多元醇替代品用于聚氨酯应用的潜力。用环氧丙烷对木质素进行化学改性，形成木质素聚醇衍生物。这是通过木质素与马来酸酐的两步反应，然后是环氧丙烷，以及在酸性和碱性条件下的直接烷氧基化来完成的。从每种方法得到的木质素聚醇的物理化学性质以及随后的扩链羟基基团都进行了评估。在碱性条件下直接烷氧基化木质素比在酸性条件下更有效，并且比两步法制备具有更高脂肪族羟基含量的木质素聚醇更有效。
