脲醛树脂及三聚氰胺改性脲醛树脂对桉木热解液组分的影响

为了有效利用热解技术处理废弃人造板,采用气质联用技术对比分析桉木、添加质量分数10% 脲醛(UF)树 脂的桉木、添加质量分数10%三聚氰胺改性脲醛(MUF)树脂的桉木、UF 树脂、MUF 树脂的热解液组分。结果表 明:桉木热解液成分复杂,其中2,5-二甲基呋喃的相对含量达到27.56%,3-甲基-2-羟基-2-环戊烯-1-酮和4-(2-氧 代)-2-环己烯-1-酮的相对含量分别为7.04%和7.02%,2,6-二甲氧基苯酚的相对含量为9.48%。添加UF 树脂的 桉木热解液检测到含氮物质的相对含量比桉木热解液增加22.93%,该热解液有望用于肥料生产和土壤改良;添加 MUF 树脂的桉木热解液出现了木糖、丁内酯等桉木热解液中未检测到的产物。 

Effects of urea formaldehyde resin and melamine urea formaldehyde resin on eucalyptus pyrolysis liquid

In order to effectively process wood-based panel waste by pyrolysis technology process, the effects of adhesives on wood pyrolysis liquid products was studied in this paper. GC/ MS technique was used to analyze the pyrolysis liquids of eucalyptus, eucalyptus with 10% UF resin, eucalyptus with 10% MUF resin, UF resin and MUF resin. The results showed that the composition of eucalyptus pyrolysis liquid was complex, in which the relative content of 2,5-dimethylfuran reached 27.54%, and that of 2-hydroxy- 3-methyl-2-cyclopenten-1-one and 4-( 2-oxopropyl )-2-cyclohexen-1-one were 7.03% and 7.01% respectively, and 2,6-dimethoxy-phenol was 9.47%. The relative amount of nitrogenous substance in the pyrolysis liquids of eucalyptus with UF resin was 22.92% more than that in the pyrolysis liquid of eucalyptus wood. The pyrolysis liquid could be utilized in the production of fertilizer and soil amendment. The composition in the pyrolysis liquid of eucalyptus with MUF resin contained xylose and butyrrolactone which could not be detected in the pyrolysis liquid of eucalyptus. This study could provide theoretical foundation for utilization of the abandoned wood-based panel rationally.