Research On Novel Porous Solid Control-released Anisole Fragrance Materials

With the improvement of living standards,people's pursuit of health is also getting higher and higher,the development of low hazardous,low-tar and high aromatic cigarettes has been the focus of the tobacco industry.In order to improve the aroma releasing ability of cigarette products,a variety of cigarette flavoring technology has been developed,flavoring technology is including compound flavoring,microcapsule flavoring,ion exchange resin flavoring,microporous polymer flavoring and adsorbent flavoring.In all these flavoring technologies,adsorbent flavoring technology has been a hotspot in the study of tobacco industry in recent years,because it has the advantage of guaranteeing aroma pure,fragrance material storable,and release controllable.In this paper,the desorption kinetics and diffusion mechanism of anisole perfume on various adsorbents were studied by gravimetric method,and the diffusion coefficient estimation model of De(T)-q(T)was deduced.The experimental results showed that desorption process of anisole perfume molecules on adsorbent materials first undergoes general diffusion and then Knudsen diffusion,finally,surface diffusion on some adsorbent materials would also appear.Moreover,the pore structure of adsorbent has an effect on desorption and diffusion mechanism of anisole perfume molecules.The higher the proportion of adsorbent micropores,the higher the proportion of desorption of anisole molecules in the form of surface diffusion.A series of porous glucose-based carbon materials was synthesized by using the glucose and KOH as raw materials,through adjusting the mass ratio of KOH to carbon material,the pore structure changed,micropore ratio decreased from 0.45 down to 0.34,resulting in the ANISOL spices release ratio increased from 44.4% to 79%.In this paper,a high release rate of 86.9% to 91% for the porous material was obtained by introducing hetero atoms(N,B)to the porous material with a slow release rate of 55%.The reason for the increase of the release rate was that the average pore size of the new porous material was larger than that of the original material due to the addition of hetero atoms,and the pore size of the new porous material increased from 2.39 nm to 3.35 nm and 5.34 nm,respectively.The larger the average pore diameter of porous materials,the weaker the adsorption capacity of aromatic molecules,an then the aromatic molecules are easier to be removed from porous materials,leading to a greater release rate of perfume molecules on the porous material.In this paper,glucose,sodium bicarbonate and thiourea were used as raw materials for synthesis of carbon material layers,anisole molecules desorption from three kinds of lamellar carbon materials was mainly in the form of both diffusion and surface diffusion mechanism,and the desorption efficiency for that was approximately in the range of 47.45-74.55%,while the desorption rate reached a maximum of 92%.