【摘要】 为提高水性液体磁性磨具的稳定性,制备以六偏磷酸钠与聚丙烯酸(PAA)为表面活性剂、纳米二氧化硅为辅助剂的复合分散剂。通过Minitab软件的DOE实验设计模块,以水基液体磁性磨具的沉淀率和零场黏度为评价指标,采用极端形顶点设计复合分散剂的配方并实验研究复合分散剂各组分对沉淀率和零场黏度的影响。结果表明:六偏磷酸钠与PAA之间存在协同作用,纳米二氧化硅对水基液体磁性磨具的零场黏度起到重要作用,三者能够很好地提高水基液体磁性磨具的稳定性。综合考虑沉降率和零场黏度,确定复合分散剂的最佳配比,并通过实验验证了预测值的准确性。更多还原

【Abstract】 To improve the stability of water-based fluid magnetic abrasives,the compound dispersant was prepared with sodium hexametaphosphate and polyacrylic acid( PAA) as surfactants,and nano-Si O2 as the auxiliary. Through the DOE experimental design module of Minitab software,using sedimentation rate and off-state viscosity of water-based fluid magnetic abrasives as evaluating index,the ingredient of the compound dispersant was studied by extreme vertex design,the effects of the components of composite dispersant on sedimentation rate and off-state viscosity were studied. The results show that there is synergistic effect between sodium hexametaphosphate and PAA,nano-Si O2 plays an important role in the off-state viscosity of water-based fluid magnetic abrasives. The stability of water-based fluid magnetic abrasives is improved by the three kinds of additives. Comprehensive consideration of the sedimentation rate and off-state viscosity,the optimum mixing ratio of the composite dispersant was determined,and the accuracy of the predicted value was verified by experiments.更多还原