复合材料滤嘴棒与醋酸纤维滤嘴棒减害效果差异的机理分析

Mechanism of Different Removal Rate of Deleterious Compounds in Mainstream Cigarette Smoke of CAPF and Cellulose Acetate Filter Rods

关键词:  木浆纤维  醋酸纤维  复合材料滤嘴棒  氨气  苯并芘  CAPF

Key Words:wood fibre  cellulose acetate  filter rods  ammonia  benzopyrene  CAPF

摘要:从理论上探究复合材料滤嘴棒（CAPF）和普通醋酸纤维滤嘴棒对烟气中氨气、苯并芘去除效果差异的主要原因，对比分析木浆纤维和醋酸纤维对这两种物质的物理吸附和化学吸附的差异及其原因。研究结果表明，木浆纤维的吸水能力较醋酸纤维更好，氨气由于易溶在木浆纤维吸收的水分中而更多地被截留，说明了CAPF滤嘴棒对降低氨气含量效果更好的原因；CAPF滤嘴棒对苯并芘的物理吸附能力较醋酸纤维滤嘴棒强，且均不存在化学吸附，说明了CAPF滤嘴棒对降低苯并芘含量效果更好的原因。

Abstract:The main materials of CAPF rod filler are wood fibres, and they are acetate fibres in cellulose acetate filter rods. These two kinds of filter rods exist in differences in removing rate of ammonia and benzopyrene in mainstream cigarette smoke. The purpose of this paper was to analyze the reasons causing the aforementioned differences, to find out the differences of physical and chemistry adsorption capacities for ammonia and benzopyzene of those wood fibre and acetate fiber. The results showed that wood fiber has better hydrophilicity than the acetate fibre, and ammonia is soluble in water so it’s easier to be absorbed by wood fibre. The pore structure investigation indicated that, the section composed of wood fibres in CAPF rods has smaller mean pore size and large amount of pore with small size therefore it absorbs more small granular substance easily such as benzopyzene. Benzopyzene can’t start chemical reaction with wood fibre and acetate fibre when it goes with smoke through cigarette filter rods.