中文摘要：

为了研究木质素改性产物（GCL1-JB）的结构对其分散稳定性及吸附特性的影响,通过向GCL1-JB水溶液中添加二氧六环制备一系列不同构象的GCL1-JB.利用分散稳定仪和逐层自组装技术研究不同构象GCL1-JB对水泥的分散稳定性及吸附特性,发现GCL1-JB的构象越伸展,吸附量越小,但对水泥的分散稳定性更好.GCL1-JB构象较伸展时,能平坦地吸附在固体表面,形成致密平整的吸附膜,有效阻止水泥颗粒间的相互凝聚.这也是GCL1-JB分散稳定性优于木质素磺酸钠的重要原因.

英文摘要：

In order to reveal the influence of the structure of the modified lignin GCL1-JB on its adsorption charac- teristics and dispersion stability, a series of GCL1-JB of different conformations were prepared by adding dioxane in- to the aqueous solution of GCL1-JB. Then, the dispersion stability of cement/GCL1-JB suspension and the adsorp- tion characteristics of GCL1-JB of different conformations were determined by using a TurbiscanLab analyzer and by means of the sequential adsorption process. The results show that with the increase of the stretch conformation of GCL1-JB, the amount of GCL1-JB adsorbed on a solid surface decreases while the dispersion stability of GCL1-JB for cement particles increases. In addition, the GCL1-JB of more stretch conformation can adsorb flat and form a compact and smooth film, thus effectively preventing cement particles from agglomerating. This is why the disper- sion stability of GCL1-JB is superior to that of sodium lignosulfonate.