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.
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.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第10期63-69,共7页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(21374032
21376100)
国家"973"计划项目(2012CB215302)
关键词
木质素改性产物
构象
伸展结构
分散稳定性
吸附特性
modified lignin
conformations
stretch structure
dispersion stability
adsorption characteristic
