卷烟纸用麻浆热解行为研究

Investigation of the pyrolysis behavior of hemp pulp used in cigarette paper

采用热分析以及热裂解气相色谱/质谱联用仪研究了卷烟纸用麻浆的热解行为。在空气氛围中,将麻浆分别在350,400,466和500℃下进行热裂解,并以GC/MS对其裂解产物进行定性和半定量分析。结果发现,麻浆可裂解出3-戊烯-2-酮、糠醛、2-甲基-苯酚和庚酸等32种产物。低温(350℃)下,裂解产物组分主要为醛类和呋喃类化合物,且随着裂解温度的增加,醛类和呋喃类的相对含量逐渐下降。466℃时开始出现酚类,500℃时开始出现1-甲基萘等有害物质,酚类的种类和含量都增加了,但同样增加了酸类和醇类。致香成分的减少和有害物质的增加主要是高温纤维素芳环化的结果。

The pyrolysis behavior of hemp pulp used in cigarette paper was investigated using thermal analysis and pyrolysis gas chromatography-mass spectrumetry. In the air atmosphere, the hemp pulp was pyrolyzed at 350,400,466 and 500 ℃, respectively. The pyrolysis products were qualitatively and semi- quantitatively analyzed. At the four pyrolysis temperatures mentioned above, complex pyrolysis products were formed and 32 products were detected altogether, including 3-pentene-2-one, furol, 2-methylphenol and heptanoic acid. At low temperature （350 ℃ ）, pyrolysis products were mainly aldehydes and funans, and with the elevation of the pyrolysis temperature, the contents of aldehydes and funans decreased. Phe- nols starts to present at 466 ℃, and at 500 ℃, harmful pyrolysis products such as 1-methylnaphthalenes started to present, the phenols＇ type and content increased, but acids and alcohols increased similarly. The results of the decreasing of the fragrant ingredient and the increasing of the harmful pyrolysis products is mainly cellulose benzannulation at high temperature.