加热卷烟辊压法薄片丝吸湿性影响因素研究
Study on influencing factors of hygroscopic properties of rolled tobacco sheet
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摘要: 为研究加热卷烟烟芯材料的吸湿性,以辊压法薄片丝为研究对象,通过单因素试验考查外部环境相对湿度、甘油质量分数和烟粉粒径对其吸湿性的影响,并对比其与稠浆法和造纸法薄片丝吸湿性的差异;利用一级和二级吸附动力学模型分析薄片丝吸湿动力学特性,同时利用6种常见吸附模型考查辊压法薄片丝的吸湿热力学特性。结果表明,环境相对湿度和甘油质量分数对辊压法薄片丝的吸湿性影响较大,环境相对湿度越大,甘油质量分数越高,吸湿性则越强;烟粉粒径对辊压法薄片丝吸湿性的影响不明显;辊压法薄片丝与稠浆法薄片丝的吸湿性基本接近,均强于造纸法薄片丝;辊压法薄片丝的吸湿时间曲线更符合二级吸附动力学模型,其等温吸湿曲线更符合Peleg模型。Abstract: To study the hygroscopicity of heated tobacco’s core materials, rolled tobacco sheet was taken as the research object, the effects of external environmental relative humidity, glycerol mass fraction and particle size of tobacco powder on its hygroscopicity were investigated through the single factor experiment. The differences in hygroscopicity of tobacco sheets prepared by rolling method, thick pulp method and paper making method were compared. The first-order and second-order adsorption kinetic models were used to fit and analyze the moisture absorption kinetic characteristics of rolled tobacco sheet. Further investigation was conducted on the hygroscopic thermodynamic properties of rolled tobacco sheet using six common adsorption models. The results showed that environmental relative humidity and mass fraction had the greatest impact on hygroscopicity, the higher the environmental relative humidity and the glycerol mass fraction, the stronger the hygroscopicity. The effect of particle size of tobacco powder on hygroscopicity was insignificant. The hygroscopicity of rolled tobacco sheet was comparable to that of tobacco slices produced by thick pulp method, and both were stronger than that of tobacco slices produced by paper making method. The moisture absorption time curve of rolled tobacco sheet was more in line with the second-order adsorption kinetics model, and its moisture absorption isotherm curve was more in line with the Peleg model.
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Key words:
- heated tobacco /
- rolled tobacco sheet /
- hygroscopicity /
- influencing factor /
- dynamics /
- thermodynamics
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