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目的筛选可以准确描述中药浸膏粉体吸湿过程的动力学模型,科学量化吸湿过程,为进一步研究通过中药浸膏粉体改变物理性质来控制吸湿性提供理论基础。方法选择5种模型分别对51种代表性中药浸膏粉体在低、中、高3种相对湿度(33%、57%、73.5%)环境下的吸湿速率曲线进行拟合,以拟合度相关系数(R2)、残差平方(RSS)、信息准则(AIC)值为评价指标,初步筛选拟合较优的动力学模型。结果双指数模型和威布尔模型均能较好地反映中药浸膏粉体吸湿的动力学过程,但双指数模型在不同湿度条件下的适用性较威布尔模型好。结论双指数模型能较好地反映中药浸膏粉体的吸湿动力学过程。
Objective Screening can accurately describe the dynamic model of the moisture absorption process of traditional Chinese medicine extract powder and quantify the hygroscopic process scientifically to provide a theoretical basis for further study on controlling the hygroscopicity by changing the physical properties of traditional Chinese medicine extract powder. Methods Five models were selected to fit the curves of moisture absorption rate of 51 kinds of traditional Chinese medicine extract powder under low, medium and high relative humidity (33%, 57%, 73.5%) respectively. The fitting rate Correlation coefficient (R2), residual squared (RSS) and information criterion (AIC) were used as evaluation indexes to screen the optimal kinetic model. Results Both the double exponential model and the Weibull model can well reflect the dynamic process of Chinese herbal extract powder moisture absorption, but the applicability of double exponential model under different humidity conditions is better than that of Weibull model. Conclusion The double exponential model can better reflect the hygroscopic kinetics of Chinese medicine extract powder.