烟用改性壳聚糖的制备及其降苯酚效果

Preparation of tobacco flavor-modified chitosan materials and application of reducing phenol in cigarette smoke

为了选择性降低主流烟气中苯酚含量,选用常见烟用香料,分别与壳聚糖(CS)通过希夫碱反应制备得到了香兰素化学改性的壳聚糖(CS-Va)、柠檬醛化学改性的壳聚糖(CSCi)。利用傅里叶变换红外光谱(FTIR)、热重分析(TGA)和扫描电子显微镜(SEM)对材料结构进行表征。利用烟气模拟评价装置,评价了改性材料添加剂的减害效果。结果表明:(1)添加有CS-Va的5种卷烟样品中(3R4F,CM6,市售A、B、C卷烟),与相应的对照样相比,苯酚最大降低率为28.94%,添加CS-Ci的5种卷烟样品中,苯酚最大降低率为22.04%;(2)随着添加剂含量的增加,对苯酚的截留量增加;(3)CS-Va具有奶甜香气,CS-Ci具有清新果香气息,为卷烟减害材料领域提供了新的选择。

In order to reduce phenol in main stream cigarette smoke common-used tobacco flavor（vanillin and citral）were chosen to modify chitosan（CS）via schiff base reaction to prepare vanillin-modified chitosan（CA-Va）and citral-modified chitosan（CS-Ci）.The synthesized products were characterized by Fourier transform infrared spectroscopy（FTIR）,thermal gravimetric analysis（TGA）and scanning electron microscopy（SEM）.The phenol reduction performance of modified chitosan was evaluated with a simulation device.The results showed that：（1） When CS-Va was added infive cigarettes,the biggest reducing rate was 28.94%,whereas the biggest reducing rate was 22.04% when CS-Va was added in these five samples;（2） The phenol retention increased with the increase of the additive contents;（3） CS-Va had specific milk flavor and CS-Ci had fresh fruit flavor.The research provided new options for reducedtoxicant cigarette material field.