Development of Production System of High-Performance Wood-Based Materials by Glue-Additive Treatment

胶剂处理法被认为是一种切实可行的方法，可以很容易地推广到从事刨花板和胶合板生产的商业工厂，从而节省成本和能源。在胶粘剂中添加杀虫剂和杀菌剂处理刨花板，能有效地抵抗白蚁的危害，并能有效地抑制褐腐菌和白腐菌的腐朽。断口的SEM观察显示，胶合线失效是由于真菌主动侵入木材颗粒表面所致。在胶合剂中加入杀菌剂，可使有毒物质在胶合线周围存在，并能更好地分布在木材颗粒中，从而更有效地抑制真菌的生长。将五硼酸铵加入胶合剂中，通过热压固化，使单板层积材（LVL）具有阻燃性。并通过X射线光电子能谱（XPS）分析硼在耐火材料中的位置，评价了耐火材料的耐火性能与化学成分分布的关系采用低分子量酚醛树脂和高分子量酚醛树脂的混合物喷涂刨花板，制备了具有高尺寸稳定性和生物抗性的刨花板。通过XPS分析结合在树脂上的Br，检测了低分子量PF树脂的分布。

The glue-additive treatment method is considered to be a practical approach which colud be easily introduced to commercial plants engaged in particleboard and plywood production saving cost and energy. When particleboards were treated by adding insecticides and fungicides to the adhesive-glue, the treated boards resisted effectively against to the virulent termite species, and inhibit effectively the decay by both brown-rot and white-rot fungi. SEM observations of the fractures surfaces presented visible evidence on glue-line failures which were caused by the active fungal invasion onto the surfaces of wood particles. Incorporation of fungicides in the glue was considered to be more effective against fungal growth by existence of toxicants around glue-line as well as their better distribution into the wood particles.Incombustibility of laminated-veneer-lumber (LVL) was attained by mixing ammonium pentaborate to the adhesive and pressing with heat-cure, and the relationship beteween the fire-proofing properties and the distribution of the chemicals was evaluated by analysing the positions of boron with X-ray Photo-Electron Spectroscopy (XPS).The particleboards with high dimensional stability and biological resistance were also produced by spray with a mixture of low molecular-weight phenol-formaldehyde (PF) resin and high molecular-weight PF resin. The distribution of low molecular-weight PF resin was detected by XPS analysis of Br which was bonded to the resin.