草本类木素的化学与热化学性质表征

以草本类植物中稻草和毛竹为代表，采用元素分析、FTIR和31P-NMR等手段对分离得到的两种EMAL进行化学结构、性质的表征，同时运用TG-FTIR和Py-GC/MS技术对其热裂解特性进行研究。在原料的化学组成中，稻草的聚戊糖和抽出物含量较高，而毛竹的纤维素和木素含量较高。研究结果显示稻草EMAL含有丰富的G-型结构单元，毛竹EMAL主要以S-型结构单元为主，两种木素结构的差异将影响和决定热解性质和热解产物。此研究为木素在新的应用研究领域更有价值地利用提供重要的基础和理论支持。

Chemical and Thermochemical Characterizations of Lignin from Herbaceous Plants

With rice straw and bamboo as the representative of herbaceous plants, the EMAL isolated from them are characterised by elemental analysis, FTIR, and 31P-NMR to gain a deeper insight into chemical structures, properties, and TG-FTIR and Py-GC/MS technology are used to research the thermal decomposition characteristics of EMAL. In the chemical composition of raw materials, the contents of pentosan and the extract in rice straw are higher than that of moso bamboo, but the contents of cellulose and lignin are rich in moso bamboo. The results showed that G-type structure units are abundant in the rice straw EMAL and moso bamboo EMAL mainly has more S-type structure units, the differences of inherent structure can affect and determine the thermal decomposition behaviors and pyrolysis products between rice straw EMAL and moso bamboo EMAL. This study provides an important basis and more valuable information for the application of lignin in new research field.