磷系两性表面活性剂类离子液体作为水泥助磨剂的研究

首次以磷系表面活性剂制备出离子液体并研究其作为水泥助磨剂的性能.利用烷基三苯基溴化膦等四种阳离子表面活性剂与十二烷基苯磺酸钠阴离子表面活性剂(SDBS)反应制备出了四种离子液体型磷系两性表面活性剂.水泥助磨效果显示,单纯的阴、阳离子表面活性剂都没有明显助磨效果,但由磷系表面活性剂与SDBS反应制备的离子液体都表现出卓越的助磨效果.其中,甲、乙、丙、丁基四种磷系离子液体的80μm筛余量减小率都超过了80%,四种添加剂最佳掺量均为0.23%.从整体看,四种离子液体随烷基链长的增加其助磨效果有增大趋势.对同种化合物,球磨时间大于50 min时,45μm筛余量减小率增加,80μm筛余量减小率却变小.通过实验表明,其休止角均小于粉体工业上规定的最大值40°,这4种助磨剂降低了水泥标准稠度.由此可见,新制备出的四种离子液体都具有较优异的助磨性能.

Phosphorous Amphoteric Surfactant as Ionic Liquid Cement Grinding Aids

Ionic liquid prepared by phosphorus surfactant was used as cement grinding aids to study its properties for the first time .Using four kinds of three alkyl phosphonium bromide of cationic surfactants and twelve sodium alkylbenzene sulfonate anionic surfactant , fore kinds of ionic liquid type of phosphorous amphoteric surfactants were prepared .The effect of cement grinding shows that pure anionic and cationic surfactants do not have obvious grinding aid effect , but the ionic liquids prepared by the reaction of phosphorus surfactant and SDBS have outstanding grinding effect .Among them, the reduction ratio on the residueon 80 μm sieve in four kinds of phosphorus ionic liquid with different alkyl residue of methyl, ethylene, propyl, butyl were over 80%and the optimum dosage of four additives was 0.23%. On the whole , the grinding effect of fore kinds of ionic liquid compounds was increase with the increase of alkyl chain length .When the grinding time is more than 50 min, the reduction ratio on the residueon on 45 μm sieve is increased but the reduction ratio on the residueon on 80 μm sieve is smaller .The experiments show that the repose angle is less than the maximum value 40 °of powder industry regulation and the ionic liquid grinding aids reduce the standard consistency of cement .Thus, the freshly prepared four kinds of ionic liquids have excellent grinding properties .