木质素活化及在木材胶粘剂中的应用进展

木质素是相对分子量较高的天然聚合物,由于具有苯酚结构利于制备木材胶粘剂,但是木质素本身反应活性低,一般都将其活化后再利用.而且,除了以往利用最多的造纸工业产生的木质素外,研究发现木材经过褐腐菌降解后残留主要成分是结构部分发生变化的木质素,这种可再生生物质资源以其自身的结构特点在合成胶粘剂上也有很大的优势,本文结合木质素胶粘剂应用中的问题,重点概述了活化木质素的各种方法及褐腐木质素在木材胶粘剂中的应用.

Progress on Activation and Application to Wood Adhesives of Lignin

As a natural polymeric organic substance,lignin is usually used to synthesize wood adhesives because of its phenolic structures.However,it is often activated before utilization with the demerit of low reaction activities.Except for the large amount of lignin from pulp and paper,the research shows that during wood degradation the brown-rotters leave a residue that consists mainly of modified lignin,which has great merits in synthesizing wood adhesives due to its special structure.Based on the problems in application of lignin adhesives,this paper summarizes the methods of activating the lignin,and the application of brownrotted lignin in wood adhesives.