球磨法制备超微细蒽醌及其表征

Preparation of Ultra-fine Anthraquinone by Ball Milling

介绍了超微细蒽醌制备方法和表征手段。该法首先是利用球磨机将商品蒽醌球磨成细小蒽醌;然后,在十二烷基苯磺酸钠的作用下使制得的蒽醌颗粒悬浮液通过物理沉降,将较大颗粒的蒽醌分离,从而获得了超微细蒽醌的悬浮液;最后分别用可见分光光度计及马尔文粒度分析仪对超微细蒽醌悬浮液中蒽醌含量及粒度分布进行测定与表征。结果表明,用本实验的球磨机制备超微细蒽醌的适宜条件为:球磨时间12 h、十二烷基苯磺酸钠用量10%。对超微细蒽醌悬浮液中蒽醌含量及粒度分布进行测定时应充分搅拌后将悬浮液静置30 min时取样为宜。本方法可制备含量高、粒径小、粒度分布均一的超微细蒽醌悬浮液。

The preparation of ultra-fine anthraquinone （AQ） from commercial AQ by using ball milling and the characteristic of the ultra-ffne AQ were introduced in this paper. It was found that in the presence of a surfactant, i. e. , dodecyl benzene sulphonic acid （LAS）, the larger AQ particles can be separated from the ultra-fine AQ suspension through physical settlement. The amount of such ultra-fine AQ can be quantiffed by a spectroscopic method and its particle size distribution can be determined by Malvern particle size analyzer. The results indicated that the optimal conditions for ultra-fine AQ preparation at the given ball milling device should be that the milling time is 12 h with 10% of LAS, the suspension sample for analysis should be collected after 30 min＇ s settlement. The present method can provide the ultra-fine AQ suspension with higher consistency and better uniformity.