[关键词]
[摘要]
目的 采用动态水分吸附法研究金银花喷干粉的水分吸附-解吸附动力学特性。方法 在温度为20、30、40℃,相对湿度为0~85%条件下,利用动态水分吸附仪测定金银花喷干粉的水分吸附与解吸附数据,并基于6种常用的吸湿模型对实验数据进行拟合及评价。结果 温度越高,达到吸湿平衡所需的时间越短。在相对湿度65%~85%时,金银花喷干粉的质量发生明显变化;相对湿度越大,达到平衡时的质量变化越大。Peleg模型是描述金银花喷干粉水分吸附-解吸附特性的最佳数学模型。结论 动态水分吸附法可以缩短测试时间和减少人为误差,适用于金银花喷干粉的吸湿特性研究。
[Key word]
[Abstract]
Objective To study the kinetic characteristics of moisture adsorption-desorption characteristics of honeysuckle spray powder by dynamic vapour sorption method. Methods The moisture adsorption and desorption data of honeysuckle spray powder were determined by dynamic vapour sorption instrument under the conditions of temperature of 20, 30, and 40℃ and relative humidity of 0-85%. Based on the six kinds of moisture absorption models commonly used, the experimental data were fitted and evaluated. Results The higher the temperature, the shorter the time required to reach the moisture balance. When the relative humidity was 65%-85%, the quality of honeysuckle powder was obviously changed. The greater the relative humidity, the greater the quality change when the equilibrium was reached. Peleg model was the best mathematical model to describe the moisture adsorption-desorption characteristics of honeysuckle spray powder. Conclusion The dynamic vapour sorption method can shorten the test time and reduce the human error. It is suitable for the study of moisture absorption characteristics of honeysuckle spray powder.
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[基金项目]
国家自然科学基金资助项目(81260644);“赣鄱555”工程领军人才培养计划项目