摘要
应用热重分析法(TGA)和裂解气相色谱/质谱联用仪(Py-GC/MS)对天然香料琥珀酸单薄荷酯的热失重和热裂解行为及其产物进行了研究。用热重分析法建立了琥珀酸单薄荷酯主反应区热失重过程的动力学模型,并计算出相应的动力学参数。通过Py-GC/MS,分别在300,400,500,600,700,800和900℃下对琥珀酸单薄荷酯进行热裂解,对裂解产物进行了定性和半定量分析。共鉴定出薄荷醇、薄荷烯和琥珀酸等75种裂解产物,并研究了其相对含量随温度升高而变化的规律。结果表明,琥珀酸单薄荷酯在700℃以下裂解出薄荷醇、p-薄荷-3-烯和3-甲基-6-异丙基环己烯等具有致香和清凉作用的物质,而700℃以上没有释放出致香物质。随着裂解温度的升高,裂解产物越来越复杂,有害物质如苯、甲苯、蒽和荧蒽等的含量也逐渐增加。此研究为该化合物在卷烟燃烧过程中的转移行为提供了例证,并为烟草制品加香技术提供了一定的理论依据,有利于琥珀酸单薄荷酯在卷烟产品的应用。
The thermal decomposition and pyrolysis behavior of monomenthyl succinate, a natural essence, were investigated by thermogravimetry （TGA） and pyrolysis gas chromatography/mass spectrometry （Py-GC/MS）. The kinetic model of mono menthyl suecinate in the main reaction zone of the thermal decomposition process was established and kinetic parameters Ea, A and n were obtained. The qualitative and semi-quantitative analyses of the pyrolysis products of monomenthyl succinate were performed by PyGC/MS at 300, 400, 500, 600, 700, 800 and 900 ℃. Seventy-five pyrolysis products, including menthol, menthene, and succinic acid were identified. Results indicated that flavoring and refreshing substances, such as menthol, p- menth-3-ene, and 3-methyl-6-isopropyl-cyclohexene, were released from monomenthyl succinate below 700℃, while no fla- vors were found above 700℃. Moreover, with the increase of pyrolysis temperature, complicated products were generated and the relative content of harmful substances, such as benzene, anthracene, and fluoranthene were also increased. This investigation gave an exemplification for the transfer behavior of monomenthyl succinate in the cigarette burning process, and provided a conceivable theoretical foundation for the perfume reinforcement technology in tobacco products, which contributes to the application of monomenthyl succinate in cigarette products.
出处
《中国烟草学报》
EI
CAS
CSCD
2008年第4期1-7,共7页
Acta Tabacaria Sinica
基金
红塔集团科研开发项目(K-07003.01.03)
