摘要
以阳离子聚合物聚环氧氯丙烷二甲胺(EPI-DMA)为纳米复合材料插层剂,对膨润土进行改性,系统考察了聚环氧氯丙烷二甲胺在膨润土纳米层间插层过程中反应体系的聚合物用量、反应时间、温度、pH值等工艺条件对插层效果的影响,并通过比表面积测定、Zeta电位测定、X射线衍射和透射电镜分析,对插层复合材料的结构和性能进行了研究,在此基础上初步探讨了其脱色性能.结果表明,最佳制备工艺为EPI-DMA的加入浓度7.0%,反应时间2.0h,温度75℃,体系pH值7.0.经聚环氧氯丙烷二甲胺插层复合后的膨润土比表面积增大,表面电性由负值变为正值,层间距、层间缔合结构和聚集程度增加,对红色染料废水具有较强的脱色效果.
A new cationic polymer epichlorohydrin-dimethylamine （EPI-DMA） as intercalary reagent is used to prepare a series of cationic polymer/bentonite composites. The influences of the quantity of cationic polymer, reaction time, temperature and pH value on the formation of cationic polymer/bentonite are investigated. The optimum conditions for synthesis of the polymer/bentonite are also obtained, which are 7.0% initial polymer concentration, 2 h reaction time, 75 ＊C reaction temperature and system pH 7.0. This composite structure is characterized by specific surface area, （electric potential, XRD and TEM. The results indicate that the specific surface area of EPI-DMA/bentonite is increased, the bentonite surface charge is changed to positive, both the layer space and particle aggregation degree of the polymer/bentonite are enhanced. The decolorizing property of the cationic polymer/bentonite for orchil wastewater is also examined, indicating its excellent ability for dyeing water treatment.
出处
《过程工程学报》
EI
CAS
CSCD
北大核心
2007年第3期598-603,共6页
The Chinese Journal of Process Engineering
基金
山东省自然科学基金资助项目(编号:Y2003B03)
