苯乙醇微胶囊的稳定性及热释放行为研究

Study on stability of phenethyl alcohol microcapsules and their thermal releasing behavior

以苯乙醇为囊芯材料,以明胶和羧甲基纤维素(CMC)为壁材,采用复凝聚法制备了苯乙醇微胶囊,其包埋率达到92%。考察了温度和时间对苯乙醇微胶囊热释放行为的影响,以及其在卷烟纸上的贮存稳定性。结果表明,苯乙醇微胶囊可粘附在纸张纤维上,120℃加热10 min时微胶囊基本无变化,能够满足卷烟纸生产工艺要求。180℃加热40 min时微胶囊内部芯材基本挥发完全。在常温下密封保存60 d时苯乙醇保留率仍达到65%,稳定性较好。

Phenethyl alcohol microcapsules were prepared by complex coagulation method with phenethyl alcohol as core material as well as gelatin and carboxyl methyl cellulose as wall materials. The mierocapsule embedding rate achieves 92%. Effects of temperature and time on thermal releasing behavior of the phenethyl alcohol microcapsules as well as their storing stability on cigarette paper were examined. Results show that the phenethyl alcohol microcapsules can adhere on the paper fibers, and basically maintain no change at 120 ℃ for 10 min;so it can satisfy the main technological requirement for the cigarette paper. Basically, the core material of the microcapsules can volatilize completely at 180 ℃ for 40 rain;while after storing under close and room temperature for 60 d ,the retention rate of micro -capsulated phenethyl alcohol reaches 65%. It shows that the storing stability of the microcapsules is good.