【摘要】 在两种W/O微乳液体系中制备了Ag₂S纳米颗粒,用透射电子显微镜（TEM）、X射线粉末衍射仪（XRD）对其形貌和结构进行了表征.结果表明,在异辛烷/油酸钠/正戊醇/水溶液和液体石蜡/Span 80-Tween 80/正丁醇/水溶液两种微乳液体系中所制备的Ag₂S纳米颗粒均具有单斜晶型结构,颗粒粒度分布均匀,无团聚现象,平均粒径分别为18和5nm.在四球长时抗磨损试验机上考察了分散于液体石蜡中Ag₂S纳米颗粒的抗磨性能,通过扫描电子显微镜（SEM）对钢球磨斑表面进行了形貌观测.结果显示,在液体石蜡/Span80-Tween80/正丁醇/水溶液体系中制备的Ag₂S纳米颗粒可以稳定分散在液体石蜡中,具有较好的抗磨性能,并且能显著提高基础油的承载力.更多还原

【Abstract】 Ag₂S nanoparticles were prepared in two different W/O microemulsions,the structure and morphologies of as-prepared Ag₂S nanoparticles were characterized by means of X-ray powder diffraction （XRD）,transmission electron microscope（TEM）.The tribological propcrties of liquid paraffin containing Ag₂S nanoparticles were evaluated on a four-ball test machine,the worn steel surface morphology were analyzed by using of scanning electron microscope（SEM）.Results show that Ag₂S nanoparticles synthesized in two microemulsions,i.e.isooctane/sodium oleate/n-pentanol/water solution（sampleⅠ） and liquid paraffin/Span 80-Tween 80/n-butanol/water solution（sampleⅡ）both possess monocline crystal structure,and exhibit an even grain distribution.They have average particle size of 18nm and 5nm,respectively.The antiwear tests show that Ag₂S nanoparticles dispersed in liquid paraffin processed from liquid paraffin/Span 80-Tween 80/n-butanol/water solution microemulsion exhibit good antiwear properties which can improve load carrying capacity of the base oil remarkably.更多还原