Researchers from Key Laboratory of Chemistry of Northwestern Plant Resources, Chinese Academy of Sciences (CAS), have invented a method for preparing nano natural medicinal material particles by liquid-phase ultrasonic technology. They have received a Chinese invention patent for the technique on June 27. The patent number is ZL200910117753.X.

In the method, natural medicinal materials serving as raw materials are subjected to primary grinding, liquid-phase ultrasonic grinding, vacuum drying and the like to prepare the nano-level particles.

The method has the advantages of fully grinding the natural medicinal materials and preparing the nano-level natural medicinal material particles. In this way, it not only ensures that the medicinal material particles keep main characteristics of the natural medicinal materials, but also makes the medicinal material particles have nano-level in size.

Nanomaterials are materials with morphological features on the nanoscale, and especially those that have special properties stemming from their nanoscale dimensions.Important aspects of nanomaterials are high dispersivity and the vastly increased ratio of surface area to volume present, which endows nanomaterials with special physical and chemical characteristics.

Grinding natural medicinal materials by liquid-phase ultrasonic technology can not only ensure that the medicinal material particles keep main characteristics of the natural medicinal materials, but also makes the medicinal material particles have nano-level in size. Thus, it is a key technology in the modernization of Chinese Traditional Medicine.