超声波以及分散剂对纳米金刚石在水性介质中分散行为的影响

摘要

研究了不同的超声波时间和分散剂对纳米金刚石颗粒分散性能的影响。分别使用相同的超声波功率不同的超声波时间,以及在相同的超声波时间及功率下使用不同的分散剂对纳米金刚石的分散行为进行研究。实验结果表明：随着超声波时间的延长,纳米金刚石抛光液中磨料平均粒径有明显下降趋势。不同的分散剂对纳米金刚石分散的效果不同。实现纳米金刚石颗粒的分散需要机械力和化学力的双重作用。在超声波功率为650 W,超声时间240 min,加入分散剂 STH 可以得到一个平均粒径为167.4 nm的稳定的纳米金刚石分散体系。%Effect of ultrasonic treatment and dispersants on dispersion property of nanodiamond was studied.Experiments were conducted with different ultrasonic power for a constant period,and with different dispersants but the same ultrasonic treatment.Results showed that average grit size in nanodiamond polishing slurry tended to decrease as ultrasonic treatment prolonged,and that different dispersants had different influence on diamond dispersion.To achieve a uniform dispersion,both mechanical force and chemical force were required.The optimal parameters were ultrasonic power 650 W for 240 min with STH as dispersant,which resulted in a stable diamond dispersion system with average grit size of 1 67.4 nm.