3种电加热卷烟专用再造烟叶的甘油饱和吸附特性

为探究电加热卷烟专用再造烟叶（简称再造烟叶）甘油饱和吸附量的吸附规律和主要影响因素，使用化学吸附仪测定了不同类型再造烟叶对甘油的饱和吸附量及在程序升温条件（30~350 ℃）下甘油的脱附量。通过分析甘油在再造烟叶上的吸附量和吸附类型，结合再造烟叶材料的比表面积、孔径分布、表面官能团等表面性质，阐释不同再造烟叶材料的表面性质与甘油饱和吸附量之间的相互关系。结果表明:①再造烟叶的比表面积和孔结构越大越有利于提高甘油表面的吸附量；此外，再造烟叶丰富的表面含氧官能团可与甘油形成多重氢键作用，不仅可以提高甘油在再造烟叶表面的吸附量，还能提高甘油在再造烟叶表面的吸附强度。②再造烟叶的含水率越高，其表面的含氧官能团的量越高，越有利于甘油在再造烟叶表面的吸附。 

Saturated glycerol adsorption characteristics of three reconstituted tobacco samples for electrically heated tobacco products

In order to study the adsorption characteristics and key factors for saturated glycerol adsorption by reconstituted tobacco samples for electrically heated tobacco products (hereinafter referred to as reconstituted tobacco products), the saturated adsorption capacities and desorption capacities of different reconstituted tobacco materials to glycerol in programmed temperature range (30-350 ℃) were measured by chemisorption. The relationships between the surface properties of reconstituted tobacco materials and the saturated glycerol adsorption were characterized through the amounts and adsorption mechanisms of glycerol and the specific surface areas, pore size distribution and surface functional groups of reconstituted tobacco materials. The results showed that: 1)Higher specific surface areas and larger pore sizes facilitated the glycerol adsorption by the reconstituted tobacco materials. Besides, the abundant surface oxygen-containing functional groups increased the strength of hydrogen bond between functional groups and glycerol, which was beneficial to glycerol adsorption. The formation of hydrogen bonds not only improved the adsorption capacities but also enhanced the glycerol' s adsorption strength. 2) Higher moisture contents in reconstituted tobacco materials resulted in higher amounts of surface oxygen-containing functional group, and thereby improved glycerol adsorption by the reconstituted tobacco materials.