药用干燥剂(SiO_(2))吸湿特性及动力学研究

Hygroscopic Properties and Moisture Absorption Kinetics of Medicinal Desiccant

采用吸附的方法研究药用干燥剂(SiO_(2))在不同温度(25,40,60℃)和相对湿度(35%,45%,60%,75%,90%)下放置48 h时的吸湿特性。结果表明,温度一定时,吸湿量随相对湿度的增加而增加。相对湿度一定时,随着温度升高,吸湿量有一定变化。从动力学角度分析药用干燥剂的吸湿特性,采用一阶模型和Peleg模型进行拟合,结果显示拟合性良好。

Hygroscopic properties of medicinal desiccant silica dioxide at 48h were studied using the method of adsorption at different temperatures(25,40,60℃)and relative humidity(35%,45%,60%,75%,90%).The results showed that when the temperature is constant,the moisture absorption increases with the increase of the relative humidity.When the relative humidity is constant,as the temperature increases,the moisture absorption will change to a certain extent.Analyze hygroscopic properties of medicinal desiccant silica from view of dynamics,Peleg model were adopted to simulate water absorption kinetics,and the results show that the fitting effect is good.