聚乳酸–活性炭–异戊酸乙酯复合膜的制备及其缓释性能  

The preparation of composite film of ethyl isovalerate-active carbon-polylactic acid and its slow-release property

作　　者：崔雨琪 邓婷 丁莎 杨华武 郑聪慧 周建良[2] 尹双凤[3] CUI Yuqi;DENG Ting;DING Sha;YANG Huawu;ZHENG Conghui;ZHOU Jianliang;YIN Shuangfeng(Technology Center,China Tobacco Hunan Industrial Co.Ltd,Changsha,Hunan 410007,China;School of Chemistry and Chemical Engineering,Central South University,Changsha,Hunan 410083,China;College of Chemistry and Chemical Engineering,Hunan University,Changsha,Hunan 410082,China)

机构地区：[1]湖南中烟工业有限责任公司技术中心,湖南长沙410007 [2]中南大学化学化工学院,湖南长沙410083 [3]湖南大学化学化工学院,湖南长沙410082

出　　处：《湖南农业大学学报（自然科学版）》2020年第6期664-669,共6页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：中国烟草总公司重大专项(110201601009)。

摘　　要：为解决低沸点酯类香料异戊酸乙酯应用于加热卷烟时极易挥发散失的问题,以活性炭为吸附剂、聚乳酸(PLA)为膜包覆材料,制备了聚乳酸–活性炭–异戊酸乙酯复合膜。通过扫描电镜(SEM)表征结构、利用热重分析、Py–GC/MS考察复合膜中异戊酸乙酯的受热释放特性,采用烟气实时在线分析系统对添加复合膜的加热卷烟进行逐口烟气分析,考察烟气中异戊酸乙酯的逐口释放均匀性。结果表明:聚乳酸–活性炭–异戊酸乙酯复合膜中活性炭表面被聚乳酸膜包裹,这样的结构能帮助阻挡活性炭孔道中吸附的香精香料的挥发;与异戊酸乙酯香原料对比,复合膜中香料的起始释放温度可提升至100℃,并能在100~300℃时缓慢释放异戊酸乙酯香气;与直接加香相比,含复合膜的加热卷烟烟气中异戊酸乙酯的丰度提高了近90倍,且能持续、均匀释放至第8口。To prevent the rapid release of volatile flavor ethyl isovalerate which was applied in the heated tobacco product(HTPs),a slow-release composite film of ethyl isovalerate was prepared with activated carbon as adsorbent and polylactic acid as coating material.The surface structure of the composite film was observed by scanning electron microscope(SEM),the release property of ethyl isovalerate within the film during heating was evaluated by thermogravimetric analyzer and pyrolysis-GC/MS,and the puff-by-puff release uniformity of ethyl isovalerate from HTPs with the composite film was analyzed using mainstream aerosol online analysis system.Results indicated that the structure of the composite film can prevent the ethyl isovalerate from rapid volatilization.The TG curves showed that the ethyl isovalerate in the composite film could maintain stable till 100℃,and can be continuously and uniformly released from the composite film at temperature from 100℃to 300℃.Compared to HTPs with directly spraying ethyl isovalerate,the intensity of ethyl isovalerate in the smoke of HTPs with the composite film increased by nearly 90 times,and the ethyl isovalerate can be consistently released till the eighth puff of smoke.

关 键 词：加热卷烟 缓释 复合膜 异戊酸乙酯 聚乳酸 活性炭 

分 类 号：TS426[农业科学—烟草工业]