木材的苯酚及多羟基醇液化

为拓展新的木材加工领域 ,使木材液化这一先进的木材化学加工技术尽早地应用于我国的木材行业 ,提高木材的综合利用率 .该文系统归纳了高温高压法、溶剂分解法、催化剂法及无催化剂法等木材液化方法 ,高温高压法是最早的木材液化方法 ,而采用硫酸、盐酸、磷酸和草酸等作为酸性催化剂的催化剂法是目前研究最多、最具实用价值的木材液化方法 .该方法进一步系统深入地讨论了木材的苯酚液化和多羟基醇液化 ,以及木材主成分 (纤维素与木素 )的液化反应路径 ,并对木材液化生成物的用途进行了探讨。作者认为有必要深入研究木材的液化机理 ,开发新的环保型液化剂和“绿色化”液化方法 ,开展液化产物与其他材料复合的研究 ,研制具有优异性能的新型复合材料 ,如酚化木材 蒙脱土纳米插层复合材料等

Liquefaction of wood by using phenol or polyhydric alcohols

To improve the new technique of effective utilization of wood resources, several methods of wood liquefaction, such as high_temperature and high_pressure method, dissolution method, acid_catalyzed method and non_catalysis method, are systematically described in this review. In these methods, the first one is the most primitive, and the last one taking sulfuric acid, hydrochloric acid, phosphoric acid or oxalic acid etc. as catalyst is the most promising and applicable method. Furthermore, this paper systematically and deeply discussed wood liquefaction in the presence of phenol or polyhydric alcohols. Moreover, some reaction behaviors and pathways of the major components of wood, and the utilization of liquefied wood are discussed. At the last, the author indicates that:first, the mechanism of wood liquefaction needs to be further explored; second, the new environment_friendly liquefaction solution and \!green\" nontoxic liquefaction method should been developed; meanwhile, the compounding of liquefied wood and other materials should be studied to obtain new composites with prominent properties such as liquefied_wood/montmorillonite intercalative nanocomposites.