分散剂对有机蒙脱土悬浮液分散稳定性的影响  

EFFECT OF DIFFERENT DISPERSANTS ON THE DISPERSION STABILITY OF ORGANIC MONTMORILLONITE(OMMT) SUSPENSION

作　　者：姜卸宏[1] 曹金珍[1] 罗冠群[1] 

机构地区：[1]北京林业大学材料科学与技术学院,北京100083

出　　处：《中国陶瓷》2010年第8期32-35,47,共5页China Ceramics

基　　金：人事部回国人员启动项目"纳米技术在木材的水基防腐处理中的应用"

摘　　要：研究通过重力沉降法、Zeta电位分析法以及粘度分析,研究了二癸基二甲基氯化铵(DDAC)以及不同复配分散剂对有机蒙脱土在水溶液中的分散行为,以及pH值对有机蒙脱土分散稳定性的影响。结果表明:有机蒙脱土悬浮液的分散稳定性随着DDAC浓度的增加呈现先增后减的趋势;不同高分子分散剂与DDAC复配后,降低了悬浮液的Zeta电位,但却提高了体系的空间位阻效应,当悬浮液体系的pH值为8～11范围内时,体系的稳定性提高。The dispersion stability of organic montmorillonite （OMMT） suspension with DDAC and its compound with other dispersants was characterized through gravity sedimentation and Zeta-potential methods, and the effect of different pH value on OMMT suspension was also studied. The results showed that with the increasing DDAC content, the stability of OMMT suspension was first increased and then decreased the Zetapotential of OMMT suspension with compound dispersants was reduced, while the dispersibility of OMMT particles was improved by the extra steric effect besides, the stability of OMMT suspension was strongly influenced by pH value, and the best dispersion was obtained when the pH value was within 8 - 11.

关 键 词：有机蒙脱土 分散剂 稳定性 

分 类 号：TQ174.4[化学工程—陶瓷工业]