| 摘要: |
| 【目的】采用接触角法测量不同类型烟叶的表面自由能，为烟叶表面润湿性的量化表征和加香加料生产工艺的改进提供理论依据。【方法】以2010年云南产的白肋烟、烤烟和香料烟为试验对象，利用视频光学接触角测量仪测定不同探测液与3种云南烟叶表面的接触角，计算烟叶的表面自由能及其分量。【结果】云南产的白肋烟、烤烟和香料烟的表面自由能比较接近，分别为25.21， 25.77和 27.15 mN/m；极性分量和色散分量所占比例差别显著，对色散分量而言，香料烟高达92.3%，而烤烟仅为41.1%，白肋烟居中，为65.5%。【结论】3种云南烟叶的表面自由能较低，属于低能表面，较难被水润湿，较易被一些特定表面张力的液体润湿。 |
| 关键词: 烟草 接触角 表面自由能 色散分量 极性分量 |
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| 基金项目:中国烟草总公司郑州烟草研究院院长基金项目（422010CA0540） |
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| Surface free energies and their fractions of different tobacco leaves in Yunnan |
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| Abstract: |
| 【Objective】The aim of this paper was to characterizing the surface free energies (SFE) of different tobacco leaves using contact angle method to improve tobacco flavoring and casing.【Method】SFEs of three tobaccos (Burley,Flue-cured,and Oriental tobaccos) were obtained by measuring the contact angles between probe liquids and tobacco leaves.【Result】The results indicated that the SFEs of Burley,Flue-cured,and Oriental tobacco leaves were 25.21,25.77,and 27.15 mN/m,respectively.There were distinct differences in the proportion of polar and disperse fractions.The disperse fraction of Oriental tobacco leaves was as high as 92.3%,while that of Flue-cured and Burley tobacco leaves were 41.1% and 65.5% only.【Conclusion】Three Yunnan tobacco samples were low-energy surface with low SFEs.The samples could be easily wetted by liquids with certain surface tensions rather than distilled water. |
| Key words: tobacco contact angle surface free energy disperse components polar components |
