二维纳米材料增强加热不燃烧卷烟再造烟叶导热性

【作者】 李典； 刘鸿； 李伟； 陆漓； 王萍娟； 黄忠辉； 许蔼飞； 孟冬玲； 梁俊；

【机构】 广西中烟工业有限责任公司技术中心； 复旦大学化学系；

【摘要】 [目的]当当使用电加热烟具对加热不燃烧卷烟进行加热抽吸时,因烟支中的再造烟叶导热性能不良导致中心加热区的部分碳化而其他大部分区域未得到充分的加热,会降低烟支烟草原料的利用效率。[方法]采用高导热性能的二维纳米材料与加热不燃烧卷烟再造烟叶复合的方法可以制备得到导热型再造烟叶。用浸渍法在再造烟叶表面负载石墨烯纳米片,形成石墨烯/再造烟叶/石墨烯两种复合再造烟叶。通过SEM、DSC、热导仪考察了复合再造烟叶形貌和热性能等,并以薄荷醇作为模拟香味物质考察其对香味成分的负载能力。[结果](1)石墨烯/再造烟叶/石墨烯多层的复合再造烟叶可将再造烟叶的热导率提高为原来的97倍,几乎接近了石墨烯纳米片复合材料的热导率;(2)修饰过后的再造烟叶的基本化学成分没有改变,其对模拟香料薄荷醇的负载能力未受影响,甚至较修饰前略有提高。[结论]采用二维纳米材料修饰再造烟叶能提高其导热性能,且不影响其作为烟草原料的性能。更多还原

【Abstract】 [Objective] When the heat-non-burn cigarette is heated by electrical-heating type appliance for exhaling,the low thermal-conductivity of reconstituted tobacco in cigarette lead to that the carbonization occurs in concern position but most of the other areas are not fully heated,which will reduce the utilization efficiency of the tobacco.[Method] The method that compounds the two-dimensional nano materials with high thermal conductivity and HTP reconstituted tobacco is utilized to prepare the heat-conducting reconstituted tobacco.The impregnation method was used to load the graphene nanosheet onto reconstituted tobacco,which formed the graphene/reconstituted tobacco/graphene multiple-layers structure.The SEM,DSC and thermal conductivity instrument were taken advantage of measuring the morphology and thermal behaviors of reconstituted tobacco,while its capability of loading flavor substance was investigated by the menthol as a simulated matter.[Result] The results showed that;1)the thermal-conductivity of graphene/reconstituted tobacco/graphene multiple-layers structure effectively increased to 97 times than before,which have been close to the thermal-conductivity of graphene nano-sheets twined by nano-cellulose;2) After modification the common chemical components of reconstituted tobacco are not change,and the loading amount of mimic flavor component menthol is not influence,even which increases a little compared with non-modified reconstituted tobacco.[Conclusion] The reconstituted tobacco modified with two dimensional nanomaterials can improve its thermal conductivity without affecting its performance as the tobacco raw material.更多还原