中文摘要：

以禾草纤维制浆废液为主要原料，在合适的条件下经羟甲基化和交联等改性反应后合成新型生物质固沙材料。对生物质固沙材料在反应过程中结构特性变化的研究表明，麦草碱木质素与尿素、甲醛发生了相当程度的缩合，交联产物的大分子量组分有较大幅度提高，而半纤维素与脲醛不能发生交联反应。合成固沙材料的交联反应主要发生在木质素的愈创木基和对-羟基苯基结构上，并且愈创木基结构和对-羟基苯基结构发生交联反应的概率基本相同。生物质固沙材料的固沙强度与木质素C5位交联程度呈现良好的线性关系。

英文摘要：

New biomass sand stabilization material （BSSM） was prepared by modification reactions such as methylolation and cross-link reaction under suitable condition with wheat straw soda pulping effluent as the major raw material. The study on the structural property changes shows that a condensation took place between wheat straw alkali lignin and urea formaldehyde, the large molecular weight composition by cross link improves obviously and no cross linking reaction took place between hemicellulose and urea-formaldehyde. Guaiacyl and p-hydroxy phenyl structure of the lignin are the main positions for sand stabilization material synthesis cross-link reaction, and the reaction probability of guaiacyl and p-hydroxy phenyl structure in lignin is almost the same. It shows a good linear relationship between the sand stabilization strength of the biomass sand stabilization material and the cross-link degree of lignin C5 position.