草浆废液制备生物质固沙材料及其在植被恢复上的应用(系列报道之一)生物质固沙材料的合成

以禾草纤维制浆废液为主要原料，在一定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（BSSM）。对制浆废液、纯化碱木质素和分离半纤维素的改性合成研究表明，随着尿素质量分数的增加，制浆废液和纯化碱木质素合成产物的粘度均有不同程度下降，但半纤维素合成产物的粘度却略有上升。纯化碱木质素与脲醛呈现出良好的交联反应性能，其合成产物用于固沙的抗压强度较好，而植物原料中的碳水化合物对脲醛改性合成固沙材料则有不利的作用。在利用制浆废液合成固沙材料时，应将尿素质量分数控制在10％～20％之间。

Preparation of biomass sand stabilization material from straw pulp effluent and its application on vegetation restorationii I Synthesis of biomass sand stabilization material

A brand new biomass sand stabilization material (BSSM) was prepared by the modification reaction of methylolation and cross-link etc. with wheat straw pulping effluent as the major raw material. The analysis of the results of modification and synthesis of pulping effluent, purified soda lignin and hemicellulose isolated from wheat straw shows that, with the increase of urea mass fraction, the viscosity of the synthetic product from either pulping effluent or purified soda lignin dropped down to different degree whereas that from hemicellulose syn- thetic product went up slightly. There exits a desirable cross linking reaction between purified soda lignin and urea-formaldehyde, and their synthetic product has a preferable compression strength of sand fixation, whereas the carbohydrate in the plant raw material has an unfavorable effect on the modified synthetic urea-formaldehyde sand stabilization material. The fraction of urea should be within 10% to 20% in synthesized sand stabilization material with pulping effluent.