PEO辅助助剂对胶体悬浮液絮凝作用影响

Effects of PEO cofactor on the flocculation of colloidal suspensions

以PEO/辅助助剂系统为絮凝系统,对PCC、瓷土和TiO2等三种胶体悬浮液进行絮凝实验,探讨了辅助助剂对胶体悬浮液絮凝作用的影响。结果表明,开环结构的辅助助剂的絮凝效果好,闭环结构的絮凝效果差。由于辅助助剂DEA和ACS带有阴电荷,因此呈阳电性的PCC絮凝最好。使用高阳电性的辅助助剂VBT1时,TiO2的絮凝效果最好。使用PEO/VBT2对三种胶体悬浮液进行絮凝,对瓷土的絮凝效果最好。总体上,瓷土胶体悬浮液最易絮凝。说明辅助剂的电荷密度和酚羟基的密度对胶体悬浮液的絮凝的重要性。

In this paper, the PEO cofactor system is used as the flocculation system in the flocculation trial of the three colloidal suspensionsPCC, Clay and TiO2. The effect of PEO cofactors on the flocculation of the three suspensions is studied. The results show that the open ringcofactor is superior in effect while the close ring cofactor inferior in flocculation. Anionic cofactors DEA and ACS enable the positronic PCC tohave the best flocculation result. When cationic cofactor VBT1 is used, TiO2 exhibits the optimal effect. The employment of PEO/VBT2 in thethree suspensions presents the best flocculation effect on the clay suspension. In general, the clay suspension is most accessible to flocculation.So the charge density and phenolic hydroxyl density are important in the flocculation of colloidal suspensions.