白松木成型燃料热解焦油用于合成酚醛树脂胶黏剂的研究

STUDY ON PYROLYSIS TAR OF WHITE PINE MOLDING FUEL FOR SYNTHESIS OF PHENOL-FORM ALDEHYDE RESIN ADHESIVE

采用简单蒸馏法获得木焦油中170～220℃的馏分。采用气质联用仪（GC／MS）对馏分成分进行分析，确定32种化合物，约占总木焦油量的97％，其中酚类化合物的总相对含量为79．57％。用木焦油部分替代苯酚合成酚醛树脂胶粘剂，采用Na0H催化法，对焦油替代量、反应温度、反应时间等工艺参数进行正交试验，确定最佳工艺条件，制得的酚醛树脂胶的性能符合GB／T14732--2006要求，胶合强度为1．79MPa。在实验条件下，随着焦油替代量的增加酚醛树脂中的游离酚逐渐下降，游离醛随之增高。

The distillates of wood tar from 170 ℃ to 220 ℃ were obtained by the distillation method. 32 compounds in the distillates were identified by GC/MS and the weight of these compounds was over 97% of the weight of wood tar, meanwhile, total relative content of phenolic compounds was up to 79.57%. The synthesis of phenol-formaldehyde resin （PF） adhesive used wood tar to replace phenol partly, the orthogonal experiment of wood tar amount, reaction temperature and reaction time was carried out by NaOH catalysis method to confirm the best synthesis condition. The performance of produced PF adhesive satisfied the demands of GB/T 14732--2006 and the bonding strength reached 1.79 MPa. In the experimental conditions, the content of free phenol gradually decreased and content of free formaldehyde increased with the increase of content of wood tar.