不同类型的加热卷烟原料性能比较

  目的  为开发适用于加热卷烟烟支用原料，掌握不同制造工艺原料的物理化学特性的区别。  方法  通过收集不同的加热卷烟原料样品，采用光学显微镜法、差示扫描量热法（Differential Scanning Calorimetry, DSC）、热重红外联用（TG-IR）和裂解气相色谱质谱联用（Py/GC-MS）分析了加热卷烟原料叶丝结构及热性能。  结果  ① 光学显微镜照片显示加热卷烟用原料烟叶叶丝表面湿润，辊压法和稠浆法再造烟叶丝结构紧密，干法造纸法造纸法叶丝结构呈多孔疏松，湿法造纸法再造烟叶丝纤维结构明显，结构略疏松；②热性能分析表明叶丝、辊压法和稠浆法再造烟叶丝在50℃~400℃温度区间吸热量为（1023±150）J/g、（1280±200）J/g和（1190±180）J/g，较其它再造烟叶丝样品低，吸热量小反映了样品需要较少的外源能量即可达到目标温度；③热重红外联用和裂解气相色谱质谱联用结果表明不同工艺下的加热卷烟原料逸出气体的主要成分差别不大，主要为甘油、二氧化碳和烟碱等，稠浆法样品相较其它样品而言，在200℃~400℃下物质释放更稳定。  结论  烟丝、辊压法和稠浆法再造烟叶丝较干法和湿法再造烟叶丝结构更为致密，单位质量升高相同温度时吸热量更低，在烟支制造过程中提高发烟段原料填充量及节约加热烟具能量等方面具有优势。 

Performance comparison of different types of cut tobacco materials for heated tobacco products

To develop the raw materials suitable for heated tobacco products, the difference in physicochemical properties of different raw materials should be mastered. In this paper, the optical microscopy and multiple analytical approaches, including differential scanning calorimetry (DSC), thermogravimetry-infrared spectroscopy (TG-IR) and pyrolysis-gas chromatography-mass spectrometry (Py/GC-MS), were used to investigate the thermal properties of cut tobacco and reconstituted tobacco materials structure of heated tobacco products. The results are as follows: ①The optical microscope images showed that the surface of cut tobacco of heated tobacco products was wet, the rolling process reconstituted tobacco samples and slurry process reconstituted tobacco samples had relatively tight microstructures, while the dry paper-making reconstituted tobacco samples had porous and loose structure, and the wet paper-making process reconstituted tobacco had obvious fibre structure; ②Thermal performance analysis showed that the heat capacity of tobacco cut, rolling/slurry process reconstituted tobacco samples within temperature range of 50-400℃ was (1023±150)J/g, (1280±200) J/g and (1190±180) J/g, respectively. The lower heat capacity of rolling/slurry process reconstituted tobacco samples comparing with other reconstituted tobacco samples indicated that these two type of reconstituted tobacco samples required less external energy to reach the target temperature. ③TGIR and Py/GC-MS results showed that different heated tobacco product materials released the similar main components including glycerol, CO₂ and nicotine et al. The slurry process reconstituted tobacco sample had more releasing stability between 200℃ and 400℃compared with other samples. It can be concluded that tobacco cut sample, rolling process reconstituted tobacco sample and slurry process reconstituted tobacco sample had more dense structures in comparison with dry and wet paper-making process reconstituted tobacco samples, which reflected that less adsorbed heat was required to increase the same temperature per unit mass, so it is helpful to increase the filling amount of tobacco material in the process of manufacturing heated tobacco products and save the supply of energy by the heating device.