造纸法薄片料液的微胶囊化及其在加热不燃烧卷烟中的应用

Microencapsulation of papermaking sheet casing solution and its application in HNB cigarette

为了制备造纸法薄片料液微胶囊并研究其在加热不燃烧卷烟中的缓释效果,先对料液的挥发性香味成分进行分析,然后采用复凝聚法制备微胶囊及其理化特性的表征,最后研究微胶囊在加热不燃烧卷烟中不同材料段的缓释效果.结果表明:(1)造纸法薄片料液共有21种香味挥发性物质,其中有13种易挥发性,表明料液具有较强挥发性.(2)红外谱图的峰型表明料液被成功包埋;热重曲线表明,微胶囊中料液快速损失的温度较单独料液提高近170℃,因壁材提高其热稳定性,减少挥发.(3)微胶囊平均粒径240 nm,包埋率34.11%,放置7 d后的水分质量分数为9.37%;外观为淡淡的金黄色粉末,由扫描电子显微镜图可知其结构致密,囊壁表面较为光滑,近似椭球状.(4)加香缓释实验结果表明微胶囊添加在烟草段且添加量为0.015 g/支的效果最好,不仅增加香气量,缓释效果明显,而且刺激性明显降低,劲头提高,余味回甜,为微胶囊技术在加热不燃烧卷烟中的应用提供了理论基础.

In order to prepare for the microcapsules of paper-making sheet casing solution and investigate their sustained-release effect in heat-not-burn(HNB)cigarettes,the volatile flavor components of the casing solution were analyzed,and the microcapsules were prepared by complex coagulation method,then their physical and chemical properties were characterized.Finally,the sustained-release effect of microcapsules in different sections of HNB cigarettes were studied.The results showed are as follows:(1)There were 21 kinds of aroma volatile components in the papermaking casing solution,including 13 kinds of volatile components,indicating that the casing solution had strong volatility.(2)The peak shape of infrared spectrum indicated the casing solution was successfully embedded and thermogravimetric curve showed that the temperature for rapid loss of casing solution in microcapsule was nearly 170℃ higher than that of the casing solution,because the wall material improves its thermal stability and reduces volatilization.(3)The average particle size of microcapsules was 240 nm,the embedding rate was 34.11%,and the moisture content after 7 days was 9.37%.The appearance is light golden yellow powder.According to the scanning electron microscope,its structure was dense,and the surface of the capsule wall was relatively smooth and approximately ellipsoidal.(4)The results of flavoring and sustained-release experiment showed that the effect of microcapsule added in tobacco section and the amount of 0.015 g was optimal.It not only increased the amount of aroma,the sustained-release effect was obvious,but also significantly reduced the irritation,improved the strength,and the aftertaste returned to sweet,which provided a theoretical basis for the application of microcapsule technology in HNB cigarettes.