传统中药片剂——四物片的表面张力测定

目的:薄膜包衣技术会出现裂片等情况,这影响包衣片的外观,更重要是会影响薄膜的均匀性,从而影响包衣片活性物质的释放。因此需要一种能够反映片剂包衣质量的参数。研究表明,片剂的表面张力对薄膜与片芯之间的粘附性有重要的影响。本文主要通过Zisman外推法测定中药片——四物片的表面张力。方法:通过测定一系列测定液在片芯表面的接触角,采用Zisman外推法得到片芯的表面参数—表面张力。结果:测得四物片芯的表面张力为70 dyne/cm3。结论:四物片具有高表面能、亲水性强及双极性的特性,Zisman外推法能够准确测定中药片剂的表面张力。

The Determination of Surface Tension of Traditional Chinese Medicine Tablet

In this paper we aimed to determine the surface tension of traditional Chinese medicine (TCM) tablet and tried to provide a key reference parameter to control tablet film coating quality. Using contact angle tester, the Chinese medicine tablet, a famous Fufang Danshen tablet CP as a model example, was determined by Zisman critical surface tension method. Our study showed that the critical surface tension of Fufang Danshen tablet CP was determined to be 18.00 dyne/cm. The Zisman method, hence, can determine successfully the critical surface tension of Chinese medicine tablet and will become an effective manner to control tablet film coating quality.