基于LF-NMR和ESEM对卷烟吸湿机制研究

obacco are hygroscopic products, and moisture content has a significant impact on its quality. In this article, relaxation time of different cigarette samples were measured by low-field NMR techniques to study the moisture adsorption mechanism and the microstructure difference between different tobacco samples at different water content were observed by ESEM. Distributed exponential analysis of the NMR transverse relaxation date revealed the existence of the three distinct water populations: T21,T22,and T23,in which T21 values are the most sensitive indicators reflected the bonding strength of water. The dominated way of tobacco absorption is through the capillary sorption while after adding a polar group such as a hydroxyl the absorption mechanism steering chemisorptions. Different samples of cigarettes main difference between the epidermal cell structure are the quantity of surface pores and the tightly extent of cells Spongy tissue and palisade tissue is an important organizational form of tobacco, its present state and organizational structure is subjected to the combined effect of moisture and chemicals adding