张峻松　李强　崔凯　霍现宽　侯鹏娟　马骥　李皓

摘要：为研究不同烟草原料物理保润性能的差异性，以国内具有代表性的烤烟、薄片、膨胀梗丝、白肋烟、香料烟为研究对象，以含水率测试手套箱法为检测手段，以Weibull 模型拟合失水过程水分比随失水时间变化曲线、模型中特征时间参数α值大小，作为物理保润性能差异性的评价指标.结果表明：

Weibull模型能够较好地用于表征烟草样品干燥动力学；

不同部位烟草物理保润性能顺序为：中部>上部>下部；不同品种烟草物理保润性能顺序为：K326>红大>云烟87；不同类型烟草物理保润性能顺序为：云烟87 C3F>膨胀梗丝>香料烟>薄片>白肋烟；冻干后的烟草样品比平衡水分样品物理保润性能要好.

Abstract：In order to investigate moisture retention of different leaf tobacco materials，the moisture retention of flue＼|cured tobacco， tobacco sheet expanded stem burley tobacco and oriental tobacco were detected by the moisture content testing glove box.With water losing time fitting curve in water losing process by Weibull model and characterization time parameter α as indicators of material mositure retentivity.The results showed that： Weibull model could be well used for characterization of tobacco samples drying dynamics； The moisture retentivity in different stalk positions of tobacco： middle>upper>bottom；The moisture retentivity in different varieties were as follows： K326>Hongda>Yun87；The moisture retentivity in different types of tobacco were as follows： Yun87 C3F>expanded stem >oriental tobacco >tobacco stem >burley tobacco；The material moisture retentivity of freeze＼|dried sample was better than that of the equilibrium sample.

0引言

烟草是一种胶质毛细状多孔材料，多孔结构决定了烟草结构的孔隙率较高，这为水分凝聚提供了较大的物理空间，对水分有较高的吸附能力.另外，烟草内部还有较多的多糖、果胶、蛋白质等亲水基质，可以通过羟基等极性基团与水分子结合[1-4].烟草原料的物理保润性能是指在不同的环境条件下，烟草维持自身正常水分含量的能力[5-6].原料保润性能的优劣与卷烟水分散失的速度和多少有密切关系[7].近年来，文献报道的测试烟草物理保润性能的方法主要有常规烘箱法[8-10]、静态差量法[11]和硫酸干燥器取样法[12-13]等，但这些方法一般存在实验周期较长、步骤繁多、准确度不高等问题.本文拟利用操作简单、准确度高的烟草含水率……