不同类型烟叶的孔结构表征  

Characterization of Pore Structure of Different Kind Tobacco Leaves

作　　者：刘洋[1] 胡军[2] 刘菲[2] 赵明月[2] 曾世通[2] 张亚涛[3] 

机构地区：[1]国家烟草质量监督检验中心 [2]中国烟草总公司郑州烟草研究院 [3]郑州大学化工与能源学院

出　　处：《烟草科技》2015年第3期84-88,共5页Tobacco Science & Technology

基　　金：中国烟草总公司郑州烟草研究院院长基金项目"烟叶表面润湿性及其影响因素的研究"(422010CA0260)

摘　　要：为量化表征不同类型烟叶的微观孔结构,采用乙醇浸泡前处理结合氮吸附/解吸法,测定了不同类型烟叶的比表面积和孔隙率,并利用扫面电子显微镜观测了烟叶样品的微观形貌。结果表明:3种烟叶均具有多孔介质的明显特征,即较大的比表面积、较小的孔体积;香料烟样品的孔隙率为2.60%,烤烟样品为4.78%,白肋烟样品为10.73%,即相同体积的烟叶,白肋烟的气孔所占比例较高,结构较为疏松,香料烟相对较为致密,烤烟居中;孔的分布特征及孔体积大小与扫描电镜观测结果一致。In order to quantitatively characterize the micro-porous structure of different kind tobacco leaves, the specific surface area and porosity of flue-cured, burley and oriental tobacco leaves were measured by N2-adsorption-desorption-method followed the pretreatment of immersing in ethanol. Meantime, the surface morphology of tobacco samples was observed by a scanning electron microscope（SEM）. The results showed that： all the samples possessed obvious characters of porous medium, i.e. larger specific surface area and smaller pore volume; the porosity of oriental tobacco sample was 2.60%, that of flue-cured and burley tobacco samples was 4.78% and 10.73%, respectively; with a higher proportion of pore in leaf, burley tobacco leaf was open in structure; while oriental leaf was relatively close, and flue-cured tobacco leaf was in-between. The pore distribution characters and pore volume of samples agreed with the observation by scanning electron microscope.

关 键 词：烟叶 比表面积 孔体积 孔隙率 

分 类 号：TS412[农业科学—烟草工业]