阴离子分散剂对酸化膨润土流变性的影响  

Effect of Anionic Dispersant on Rheological Properties of Acid-bentonite

作　　者：梁虎南[1,2,3] 龙柱[1] 皮成忠[2] 杨淑蕙[1] 周小凡[2] 

机构地区：[1]江南大学生态纺织教育部重点实验室,无锡214122 [2]南京林业大学江苏省制浆造纸科学与技术重点实验室,南京210037 [3]东北电力大学应用技术学院,吉林132012

出　　处：《高等学校化学学报》2009年第3期549-552,共4页Chemical Journal of Chinese Universities

基　　金：南京林业大学江苏省制浆造纸科学与技术重点实验室开放基金(批准号:200803)资助

摘　　要：研究了阴离子分散剂聚丙烯酸钠对质量分数为10%的酸化膨润土分散体系流变性的影响.结果表明,添加0.4%分散剂的分散体系的剪切应力、表观黏度和屈服应力最低.其它体系流体均表现为从假塑型到胀流型流体的转变,而含0.4%分散剂的体系始终表现为胀流型流体.采用Herschel-Bulkley模型对各体系的流变曲线进行了拟合,得到较好的拟合曲线,同时探讨了酸化膨润土分散体系的流变机理.The effect of anionic dispersant （sodium polyacrylate） on rheological properties for 10% （mass fraction） aeid-bentonite dispersion were studied. The results show that, among dispersion containing disper- sant dosage of 0.2%, 0.4%, 0.6% and 0. 8%, respectively, the dispersion containing 0.4% dispersant has the lowest shear stress, apparent viscosity and yield stress. In range of studying shear rate, dispersion eontai- ning 0.4% dispersant exhibited dilatant characteristic and others transformed rheology from pseudoplastie to dilatant eharacteristic. The result also show that the rheograms fitting Hersehel-Bulkley model are well. The mechanism of rheological properties on acid-bentonite dispersion was also diseussed.

关 键 词：阴离子分散剂 酸化膨润土 流变性 Herschel-Bulkley模型 

分 类 号：O648.2[理学—物理化学]